Pub Date : 2024-09-26DOI: 10.1016/j.ceramint.2024.09.307
Alaa Hammoud , B. Alshahrani , Elena V. Stroganova , Valeriy A. Klimenko , Norah Alomayrah , Z.A. Alrowaili , I.O. Olarinoye , Chahkrit Sriwunkum , M.S. Al-Buriahi
Sodium borate glasses doped with Nd3+ ions and having the molar formulations 75B2O3 – 15Na2O – 9.5x – 0.5Nd2O3, where x = Bi2O3; SrO and Li2O were prepared by employing the melt quenching technique. The glasses were coded as BiNd, SrNd, and LiNd for x = Bi2O3; SrO and Li2O, respectively. The prepared glasses were characterized for their physical and optical attributes. The influence of the glass composition on the photoluminescence and fast neutron (FN) and charged radiation (CR) transmission efficiencies were also investigated. The density of BiNd, SrNd, and LiNd is 3.32, 2.43, and 3.32 g/cm3, respectively. Optical constants of the glasses showed variations with glass composition. The FTIR study of the glass also revealed the structure of the glasses. The BiNd glass has the most intense PL of all the samples, followed by SrNd glass, while LiNd had the weakest PL emission. The value of for BiNd, SiNd, and LiNd is 0.1029 cm−1, 0.1009 cm−1, and 0.0987 cm−1, respectively. The projected ranges of electrons, protons, helium ions, and carbon ions were generally lower for denser XNd glass. The XNd glasses are potentially useful of optical, shielding and dosimetry applications.
{"title":"Synthesis, photoluminescence, judd-ofelt parameters, and high energy neutron/charged particle transmission efficiencies of Nd3+ ion-activated sodium-borate glasses","authors":"Alaa Hammoud , B. Alshahrani , Elena V. Stroganova , Valeriy A. Klimenko , Norah Alomayrah , Z.A. Alrowaili , I.O. Olarinoye , Chahkrit Sriwunkum , M.S. Al-Buriahi","doi":"10.1016/j.ceramint.2024.09.307","DOIUrl":"10.1016/j.ceramint.2024.09.307","url":null,"abstract":"<div><div>Sodium borate glasses doped with Nd<sup>3+</sup> ions and having the molar formulations 75B<sub>2</sub>O<sub>3</sub> – 15Na<sub>2</sub>O – 9.5x – 0.5Nd<sub>2</sub>O<sub>3</sub>, where <em>x</em> = Bi<sub>2</sub>O<sub>3</sub>; SrO and Li<sub>2</sub>O were prepared by employing the melt quenching technique. The glasses were coded as BiNd, SrNd, and LiNd for <em>x</em> = Bi<sub>2</sub>O<sub>3</sub>; SrO and Li<sub>2</sub>O, respectively. The prepared glasses were characterized for their physical and optical attributes. The influence of the glass composition on the photoluminescence and fast neutron (FN) and charged radiation (CR) transmission efficiencies were also investigated. The density of BiNd, SrNd, and LiNd is 3.32, 2.43, and 3.32 g/cm<sup>3</sup>, respectively. Optical constants of the glasses showed variations with glass composition. The FTIR study of the glass also revealed the structure of the glasses. The BiNd glass has the most intense PL of all the samples, followed by SrNd glass, while LiNd had the weakest PL emission. The value of <span><math><mrow><msub><mi>Σ</mi><mi>R</mi></msub></mrow></math></span> for BiNd, SiNd, and LiNd is 0.1029 cm<sup>−1</sup>, 0.1009 cm<sup>−1</sup>, and 0.0987 cm<sup>−1</sup>, respectively. The projected ranges of electrons, protons, helium ions, and carbon ions were generally lower for denser XNd glass. The XNd glasses are potentially useful of optical, shielding and dosimetry applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49624-49633"},"PeriodicalIF":5.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664336","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
The advancement of laser lighting is moving towards high-power and high-brightness applications. However, traditional phosphor-in-silicone (PiS) are unable to maintain good performance under intense optical-thermal stresses. Therefore, there is a growing focus on finding color conversion material with high thermal stability and resistance to high incident laser power (Pin). Here, we have developed a low-temperature sintered phosphor-in-glass (PiG) based on a lithium-aluminium-silicate glass system. The sintered Ce3+:Y3Al5O12 phosphor-in-glass (Ce:YAG-PiG) retains the original luminescent properties of the phosphor, exhibiting a high internal quantum efficiency (IQE = 88.3 %) and high thermal conductivity (3.33 W/(m K)). At a Pin of 6.87 W, Ce:YAG-PiG achieves a luminous flux of 1481.7 lm and luminous efficiency of 221.7 lm/W. Ce:YAG-PiG shows best illumination performance in dynamic reflective module. Furthermore, the conversion efficiency and stability of the Ce:YAG-PiG color wheel surpass those of PiS color wheel, and a Ce:YAG/Ce3+:LuAG/Eu2+:CaAlSiN3 composite PiG color wheel can produce high color rendering index white light. This work is expected to find new application prospects for PiG and further promote the development of high-power dynamic laser lighting.
{"title":"Advancing laser lighting: High-brightness and high-stability Ce:YAG phosphor-in-glass","authors":"Xiangjia Sun , Yanrong Liang , Jiaying Zheng , Cong Zhao , Ziyi Fang , Tengfei Tian , Xiaojuan Liang , Weiwei Huan , Weidong Xiang","doi":"10.1016/j.ceramint.2024.09.341","DOIUrl":"10.1016/j.ceramint.2024.09.341","url":null,"abstract":"<div><div>The advancement of laser lighting is moving towards high-power and high-brightness applications. However, traditional phosphor-in-silicone (PiS) are unable to maintain good performance under intense optical-thermal stresses. Therefore, there is a growing focus on finding color conversion material with high thermal stability and resistance to high incident laser power (<em>P</em><sub>in</sub>). Here, we have developed a low-temperature sintered phosphor-in-glass (PiG) based on a lithium-aluminium-silicate glass system. The sintered Ce<sup>3+</sup>:Y<sub>3</sub>Al<sub>5</sub>O<sub>12</sub> phosphor-in-glass (Ce:YAG-PiG) retains the original luminescent properties of the phosphor, exhibiting a high internal quantum efficiency (IQE = 88.3 %) and high thermal conductivity (3.33 W/(m K)). At a <em>P</em><sub>in</sub> of 6.87 W, Ce:YAG-PiG achieves a luminous flux of 1481.7 lm and luminous efficiency of 221.7 lm/W. Ce:YAG-PiG shows best illumination performance in dynamic reflective module. Furthermore, the conversion efficiency and stability of the Ce:YAG-PiG color wheel surpass those of PiS color wheel, and a Ce:YAG/Ce<sup>3+</sup>:LuAG/Eu<sup>2+</sup>:CaAlSiN<sub>3</sub> composite PiG color wheel can produce high color rendering index white light. This work is expected to find new application prospects for PiG and further promote the development of high-power dynamic laser lighting.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 48909-48917"},"PeriodicalIF":5.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664296","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-26DOI: 10.1016/j.ceramint.2024.09.337
S. Das , D. Alagarasan , R. Ganesan , S.K. Samal , R. Naik
Bi-doped metal chalcogenides have important applications as thermoelectric and good optoelectronic devices. The present investigation is based on the optimization of various optical, structural, and electrical behaviours of quaternary Bi30Sb10Se30Te30 thin films via thermal annealing at different temperatures. The increased crystallite size and decreased dislocation density upon annealing were probed from the structural study. The contribution from the vibrational bonds in the sample with annealing was checked by Raman analysis. X-ray diffraction and high-resolution transmission electron microscopy studies confirmed the existence of the Sb2Te and Bi2Te3 phases in the film. The granular structure of the compound was seen from the surface morphology. The X-ray photoelectron spectroscopy infers the chemical states of the elements in the sample. The reduction of optical bandgap from 0.94 eV to 0.52 eV upon annealing induced an increase in refractive index from 3.44 to 4.70, while the non-linear refractive index was found to be increased by three times, and the nonlinear susceptibility was increased by four times from the un-annealed condition. The hydrophilicity nature was sustained with annealing and also increased. An increase in photocurrent and a decrease in resistivity of the films with annealing were found from the I-V measurement, which is good for electronic devices. The optimized optical and electrical parameters make the annealed films suitable for various optoelectronic applications.
{"title":"New quaternary Bi30Sb10Se30Te30 thin films with enhanced photo current and surface wettability for optoelectronic applications","authors":"S. Das , D. Alagarasan , R. Ganesan , S.K. Samal , R. Naik","doi":"10.1016/j.ceramint.2024.09.337","DOIUrl":"10.1016/j.ceramint.2024.09.337","url":null,"abstract":"<div><div>Bi-doped metal chalcogenides have important applications as thermoelectric and good optoelectronic devices. The present investigation is based on the optimization of various optical, structural, and electrical behaviours of quaternary Bi<sub>30</sub>Sb<sub>10</sub>Se<sub>30</sub>Te<sub>30</sub> thin films via thermal annealing at different temperatures. The increased crystallite size and decreased dislocation density upon annealing were probed from the structural study. The contribution from the vibrational bonds in the sample with annealing was checked by Raman analysis. X-ray diffraction and high-resolution transmission electron microscopy studies confirmed the existence of the Sb<sub>2</sub>Te and Bi<sub>2</sub>Te<sub>3</sub> phases in the film. The granular structure of the compound was seen from the surface morphology. The X-ray photoelectron spectroscopy infers the chemical states of the elements in the sample. The reduction of optical bandgap from 0.94 eV to 0.52 eV upon annealing induced an increase in refractive index from 3.44 to 4.70, while the non-linear refractive index was found to be increased by three times, and the nonlinear susceptibility was increased by four times from the un-annealed condition. The hydrophilicity nature was sustained with annealing and also increased. An increase in photocurrent and a decrease in resistivity of the films with annealing were found from the I-V measurement, which is good for electronic devices. The optimized optical and electrical parameters make the annealed films suitable for various optoelectronic applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49923-49935"},"PeriodicalIF":5.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664319","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Nanocomposites of SrBi(2-X)(CF)XNb2O9 (SBNCF) (CF=CoFe2O4 for X = 0.0 to 0.5 with a step increment of 0.1) were synthesized using the hydrothermal method and characterized for their structural, morphological, elastic, and optical properties. The incorporation of CF into SrBi2Nb2O9 (SBN) resulted in hybrid composites with tailored properties. X-ray Diffraction (XRD) with Rietveld refinement analysis confirmed the formation of orthorhombic SBN and spinel CF phases. Field Emission Gun Scanning Electron Microscopy (FEG-SEM) revealed that SBN exhibits a plate-like morphology, with the incorporation of CF into the SBN matrix resulting in both plate-like and octahedral-shaped grains. The Brunauer–Emmett–Teller (BET) method was used to determine the pore radius and surface area, both of which were found to have increased, indicating an enhancement in photocatalytic performance. The presence of the constituent elements in the prepared compositions was confirmed by Energy Dispersive Spectroscopy (EDS). Fourier Transform Infrared Spectroscopy (FTIR) spectra were used to determine elastic properties, suggesting potential applications in electronic noise filtering. From Diffuse Reflectance Spectroscopy (DRS), a recognizable semiconducting behavior and band gap bowing were noticed in SBNCF nanocomposites on the obtained energy band gap values (2.20 eV–1.56 eV) compared to the SBN host matrix (3.16 eV). The materials exhibited strong emission peaks at 470 nm, 528 nm, 584 nm, and 703 nm upon the excitation of 425 nm light using Photoluminescence (PL) spectroscopy. The white emission was predominant at room temperature in all the produced samples and the corresponding color temperature values range from 5865.93 K to 7599.05 K from the CIE diagram. The SBNCF materials are promising candidates in photocatalytic reactions and white light-emitting diodes (w-LEDs) based on their enhanced optical properties.
{"title":"Exploring the multifunctional aspects of SrBi2-X(CoFe2O4)XNb2O9 nanocomposite materials emphasizing the structural, elastic, and optical properties","authors":"Vijaya Lakshmi Garlapati, Nitchal Kiran Jaladi, Nagamani Sangula","doi":"10.1016/j.ceramint.2024.09.310","DOIUrl":"10.1016/j.ceramint.2024.09.310","url":null,"abstract":"<div><div>Nanocomposites of SrBi<sub>(2-X)</sub>(CF)<sub>X</sub>Nb<sub>2</sub>O<sub>9</sub> (SBNCF) (CF=CoFe<sub>2</sub>O<sub>4</sub> for X = 0.0 to 0.5 with a step increment of 0.1) were synthesized using the hydrothermal method and characterized for their structural, morphological, elastic, and optical properties. The incorporation of CF into SrBi<sub>2</sub>Nb<sub>2</sub>O<sub>9</sub> (SBN) resulted in hybrid composites with tailored properties. X-ray Diffraction (XRD) with Rietveld refinement analysis confirmed the formation of orthorhombic SBN and spinel CF phases. Field Emission Gun Scanning Electron Microscopy (FEG-SEM) revealed that SBN exhibits a plate-like morphology, with the incorporation of CF into the SBN matrix resulting in both plate-like and octahedral-shaped grains. The Brunauer–Emmett–Teller (BET) method was used to determine the pore radius and surface area, both of which were found to have increased, indicating an enhancement in photocatalytic performance. The presence of the constituent elements in the prepared compositions was confirmed by Energy Dispersive Spectroscopy (EDS). Fourier Transform Infrared Spectroscopy (FTIR) spectra were used to determine elastic properties, suggesting potential applications in electronic noise filtering. From Diffuse Reflectance Spectroscopy (DRS), a recognizable semiconducting behavior and band gap bowing were noticed in SBNCF nanocomposites on the obtained energy band gap values (2.20 eV–1.56 eV) compared to the SBN host matrix (3.16 eV). The materials exhibited strong emission peaks at 470 nm, 528 nm, 584 nm, and 703 nm upon the excitation of 425 nm light using Photoluminescence (PL) spectroscopy. The white emission was predominant at room temperature in all the produced samples and the corresponding color temperature values range from 5865.93 K to 7599.05 K from the CIE diagram. The SBNCF materials are promising candidates in photocatalytic reactions and white light-emitting diodes (w-LEDs) based on their enhanced optical properties.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49652-49666"},"PeriodicalIF":5.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664128","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-26DOI: 10.1016/j.ceramint.2024.09.318
Yuzheng Lu , M.A.K. Yousaf Shah , Muhammad Khalid , Naveed Mushtaq , Muhammad Yousaf , Nabeela Akbar
Protonic ceramic electrochemical cells (PCECs) can be employed for power generation and sustainable hydrogen production. Lowering the PCEC operating temperature to >500 °C can facilitate its scale-up and commercialization. However, achieving high energy efficiency and long-term durability at low operating temperatures is a long-standing challenge. Here, we report a simple and scalable approach for fabricating metal ion doping into perovskite (Li-doped SrTiO3 (STO)) using the sol-gel approach and presented as a proton conducting electrolyte with lower ohmic and polarization resistance for low-temperature ceramic fuel cells. The prepared electrolyte with symmetrical electrodes attains high power densities in fuel-cell mode (∼0.65 W cm−2 at 520 °C and ∼0.20 W cm−2 at 420 °C) and exceptional current densities in steam electrolysis mode (−0.94 A cm−2 at 1.4 V and 520 °C). Additionally, five-layer devices (Ni-NCAL/BCZYYb/Li-STO/BCZYYb/NCAL-Ni) demonstrate the proton fuel cell performance of 0.55 W cm−2 at 520 °C.
质子陶瓷电化学电池（PCEC）可用于发电和可持续制氢。将 PCEC 的工作温度降低到 500 °C 可以促进其规模化和商业化。然而，在低工作温度下实现高能效和长期耐用性是一项长期挑战。在此，我们报告了一种简单且可扩展的方法，即利用溶胶-凝胶法将金属离子掺杂到包晶体（锂掺杂的 SrTiO3 (STO)）中，并将其作为质子传导电解质，具有较低的欧姆电阻和极化电阻，可用于低温陶瓷燃料电池。制备的具有对称电极的电解质在燃料电池模式下可达到很高的功率密度（520 °C时∼0.65 W cm-2，420 °C时∼0.20 W cm-2），在蒸汽电解模式下可达到很高的电流密度（1.4 V、520 °C时-0.94 A cm-2）。此外，五层器件（Ni-NCAL/BCZYYb/Li-STO/BCZYb/NCAL-Ni）在 520 ℃ 时的质子燃料电池性能为 0.55 W cm-2。
{"title":"Surface-doped perovskite electrolyte for low-temperature ceramic electrochemical cells","authors":"Yuzheng Lu , M.A.K. Yousaf Shah , Muhammad Khalid , Naveed Mushtaq , Muhammad Yousaf , Nabeela Akbar","doi":"10.1016/j.ceramint.2024.09.318","DOIUrl":"10.1016/j.ceramint.2024.09.318","url":null,"abstract":"<div><div>Protonic ceramic electrochemical cells (PCECs) can be employed for power generation and sustainable hydrogen production. Lowering the PCEC operating temperature to >500 °C can facilitate its scale-up and commercialization. However, achieving high energy efficiency and long-term durability at low operating temperatures is a long-standing challenge. Here, we report a simple and scalable approach for fabricating metal ion doping into perovskite (Li-doped SrTiO<sub>3</sub> (STO)) using the sol-gel approach and presented as a proton conducting electrolyte with lower ohmic and polarization resistance for low-temperature ceramic fuel cells. The prepared electrolyte with symmetrical electrodes attains high power densities in fuel-cell mode (∼0.65 W cm<sup>−2</sup> at 520 °C and ∼0.20 W cm<sup>−2</sup> at 420 °C) and exceptional current densities in steam electrolysis mode (−0.94 A cm<sup>−2</sup> at 1.4 V and 520 °C). Additionally, five-layer devices (Ni-NCAL/BCZYYb/Li-STO/BCZYYb/NCAL-Ni) demonstrate the proton fuel cell performance of 0.55 W cm<sup>−2</sup> at 520 °C.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49748-49758"},"PeriodicalIF":5.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664366","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-26DOI: 10.1016/j.ceramint.2024.09.331
Ebtesam M. Alharbi , A. Rajeh
The goal of this work is to produce nanocomposites films for energy-storing and optoelectronic applications by incorporating ceramic nanofiller into a polymer blend. By using the one-pot hydrothermal process, manganese ferrite nanoparticles (MnFe2O4 NPs) have been created. The produced NPs' size and morphology were verified by TEM, and the findings show that the particles are shape spherical and average size particles of around 21.45 nm. Using the casting approach, a series of polymer nanocomposites (PNCs) comprising carboxymethyl cellulose (CMC) and polyethylene oxide (PEO) have been created with various contents of MnFe2O4 NPs: 2.0, 5.0, 8.0, and 12.0 wt%. The XRD results, which display the changes in PNCs' microcrystalline properties, revealed a decline in the samples' degree of crystallinity. FTIR spectroscopy has been used to verify that PNCs are properly formed and that functional groups are present in the nanocomposites. Using a UV–Vis spectrophotometer, the optical properties were examined. The absorbance coefficient was calculated for each sample. As the nanoparticle content increased, so did the Eg decreased both direct and indirect of the PNCs. An increase in MnFe2O4 loading improved the thermal characteristics of the nanocomposites, indicating enhanced thermal stability of the films due to nanoparticle-to-CMC/PEO blend interaction. The adding of MnFe2O4 nanoparticles to the CMC/PEO matrix enhances the charge conduction mechanism, as seen by the doped samples' noticeably improved conductivity findings. As frequency increased, the dielectric loss (ε″) and dielectric constant (ε′) values decreased. The produced sample (8 % MnFe2O4/CMC/PEO) is the best option for energy-storing and optoelectronic applications like supercapacitors and sensors due to the structural changes and improvements made to the optical, thermal, and dielectric properties.
{"title":"Development of dielectric, thermal, optical, and electrical properties of carboxymethyl cellulose/polyethylene oxide/MnFe2O4 nanocomposites for flexible energy storage and optical applications","authors":"Ebtesam M. Alharbi , A. Rajeh","doi":"10.1016/j.ceramint.2024.09.331","DOIUrl":"10.1016/j.ceramint.2024.09.331","url":null,"abstract":"<div><div>The goal of this work is to produce nanocomposites films for energy-storing and optoelectronic applications by incorporating ceramic nanofiller into a polymer blend. By using the one-pot hydrothermal process, manganese ferrite nanoparticles (MnFe<sub>2</sub>O<sub>4</sub> NPs) have been created. The produced NPs' size and morphology were verified by TEM, and the findings show that the particles are shape spherical and average size particles of around 21.45 nm. Using the casting approach, a series of polymer nanocomposites (PNCs) comprising carboxymethyl cellulose (CMC) and polyethylene oxide (PEO) have been created with various contents of MnFe<sub>2</sub>O<sub>4</sub> NPs: 2.0, 5.0, 8.0, and 12.0 wt%. The XRD results, which display the changes in PNCs' microcrystalline properties, revealed a decline in the samples' degree of crystallinity. FTIR spectroscopy has been used to verify that PNCs are properly formed and that functional groups are present in the nanocomposites. Using a UV–Vis spectrophotometer, the optical properties were examined. The absorbance coefficient was calculated for each sample. As the nanoparticle content increased, so did the E<sub>g</sub> decreased both direct and indirect of the PNCs. An increase in MnFe<sub>2</sub>O<sub>4</sub> loading improved the thermal characteristics of the nanocomposites, indicating enhanced thermal stability of the films due to nanoparticle-to-CMC/PEO blend interaction. The adding of MnFe<sub>2</sub>O<sub>4</sub> nanoparticles to the CMC/PEO matrix enhances the charge conduction mechanism, as seen by the doped samples' noticeably improved conductivity findings. As frequency increased, the dielectric loss (<em>ε</em>″) and dielectric constant (<em>ε</em>′) values decreased. The produced sample (8 % MnFe<sub>2</sub>O<sub>4</sub>/CMC/PEO) is the best option for energy-storing and optoelectronic applications like supercapacitors and sensors due to the structural changes and improvements made to the optical, thermal, and dielectric properties.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49871-49879"},"PeriodicalIF":5.1,"publicationDate":"2024-09-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664299","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-25DOI: 10.1016/j.ceramint.2024.09.312
Zhiyuan Li , Tong Wu , Zhaoxu Pan , Haibin Sun , Jiao Li , Bin Qi , Zhenhao Zhang
The Bi0.7Sr0.3FeO3-δ (BSFO)-Ag composite cathode is prepared by modifying BSFO with in-situ chemical plating of Ag. The plated Ag effectively reduces the polarization resistance (Rp) of BSFO. At the Ag loading of 20 wt%, the optimized Rp of BSFO at 650 °C in air condition is 0.35 Ω cm2, which is only 18.6 % of that of BSFO cathode (1.88 Ω cm2). The electrochemical performance improvement is primarily attributed to the low oxygen adsorption energy (Eads) domain at the interfaces of BSFO-Ag, as indicated by the first-principles calculations (Eads, −0.81eV). Thus, the addition of Ag changes the cathodic reaction rate control step from the molecular oxygen on the cathode surface adsorption and diffusion to charge transfer on the cathode. The maximum power density (Pmax) of the prepared single cell at 650 °C is 450.98 mW cm−2 using H2 (∼3 vol% H2O) as fuels. The open-circuit voltage (OCV) does not decay significantly (around 0.66 V) after 50 h at the current density of 400 mA cm−2, showing good long-term stability.
{"title":"Improved electrochemical performance of Ag-modified Bi0.7Sr0.3FeO3 cathodes by electroless plating for intermediate-temperature solid oxide fuel cells","authors":"Zhiyuan Li , Tong Wu , Zhaoxu Pan , Haibin Sun , Jiao Li , Bin Qi , Zhenhao Zhang","doi":"10.1016/j.ceramint.2024.09.312","DOIUrl":"10.1016/j.ceramint.2024.09.312","url":null,"abstract":"<div><div>The Bi<sub>0.7</sub>Sr<sub>0.3</sub>FeO<sub>3-δ</sub> (BSFO)-Ag composite cathode is prepared by modifying BSFO with in-situ chemical plating of Ag. The plated Ag effectively reduces the polarization resistance (<em>R</em><sub><em>p</em></sub>) of BSFO. At the Ag loading of 20 wt%, the optimized <em>R</em><sub><em>p</em></sub> of BSFO at 650 °C in air condition is 0.35 Ω cm<sup>2</sup>, which is only 18.6 % of that of BSFO cathode (1.88 Ω cm<sup>2</sup>). The electrochemical performance improvement is primarily attributed to the low oxygen adsorption energy (<em>E</em><sub><em>ads</em></sub>) domain at the interfaces of BSFO-Ag, as indicated by the first-principles calculations (<em>E</em><sub><em>ads</em></sub>, −0.81eV). Thus, the addition of Ag changes the cathodic reaction rate control step from the molecular oxygen on the cathode surface adsorption and diffusion to charge transfer on the cathode. The maximum power density (<em>P</em><sub>max</sub>) of the prepared single cell at 650 °C is 450.98 mW cm<sup>−2</sup> using H<sub>2</sub> (∼3 vol% H<sub>2</sub>O) as fuels. The open-circuit voltage (OCV) does not decay significantly (around 0.66 V) after 50 h at the current density of 400 mA cm<sup>−2</sup>, showing good long-term stability.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49682-49689"},"PeriodicalIF":5.1,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664130","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
This paper delves into the transformative impact of varying titanium dioxide (TiO2) content on the sinterability, physical, and mechanical properties, as well as scratch behavior, of zirconia-toughened alumina (ZTA) ceramic composites. By adjusting TiO2 content from 0 wt% to 5 wt% and employing advanced microwave sintering at 1150 °C, the study aims to lower the sintering temperature of ZTA. Microwave sintering, known for its efficiency and rapid processing, enables significant enhancements in material properties at reduced temperatures. Notably, incorporating TiO2 into ZTA yields remarkable improvements in physical and mechanical attributes, with the optimal TiO2 content determined to be 3 wt%. At this concentration, the composite achieves exceptional properties: a relative density of ∼99 %, microhardness of ∼2002 HV, and an indentation fracture toughness of ∼6.13 MPa m0.5. These enhancements represent increases of over 120 % in hardness and 61 % in toughness compared to TiO2-free ZTA. Additionally, the highest scratch resistance is observed at 3 wt% TiO2, evidenced by a minimal scratch depth of ∼7.53 μm. However, exceeding the 3 wt% solubility limit results in the formation of secondary phases, such as tialite (Al2TiO5) and zirconium titanate (ZrTiO4), which degrade the composite's properties. This research underscores the potential of TiO2 doping and microwave sintering to elevate the performance of ZTA ceramics, offering a pathway to superior materials for advanced applications.
{"title":"Simultaneous effect of microwave sintering and TiO2 addition on sinterability, mechanical properties, and scratch resistance of zirconia toughened alumina ceramics","authors":"Chandra Obulesu Bapanapalle , Prabhat Kumar Prajapati , Kishor Kumar Sadhu , Nilrudra Mandal","doi":"10.1016/j.ceramint.2024.09.321","DOIUrl":"10.1016/j.ceramint.2024.09.321","url":null,"abstract":"<div><div>This paper delves into the transformative impact of varying titanium dioxide (TiO<sub>2</sub>) content on the sinterability, physical, and mechanical properties, as well as scratch behavior, of zirconia-toughened alumina (ZTA) ceramic composites. By adjusting TiO<sub>2</sub> content from 0 wt% to 5 wt% and employing advanced microwave sintering at 1150 °C, the study aims to lower the sintering temperature of ZTA. Microwave sintering, known for its efficiency and rapid processing, enables significant enhancements in material properties at reduced temperatures. Notably, incorporating TiO<sub>2</sub> into ZTA yields remarkable improvements in physical and mechanical attributes, with the optimal TiO<sub>2</sub> content determined to be 3 wt%. At this concentration, the composite achieves exceptional properties: a relative density of ∼99 %, microhardness of ∼2002 HV, and an indentation fracture toughness of ∼6.13 MPa m<sup>0.5</sup>. These enhancements represent increases of over 120 % in hardness and 61 % in toughness compared to TiO<sub>2</sub>-free ZTA. Additionally, the highest scratch resistance is observed at 3 wt% TiO<sub>2</sub>, evidenced by a minimal scratch depth of ∼7.53 μm. However, exceeding the 3 wt% solubility limit results in the formation of secondary phases, such as tialite (Al<sub>2</sub>TiO<sub>5</sub>) and zirconium titanate (ZrTiO<sub>4</sub>), which degrade the composite's properties. This research underscores the potential of TiO<sub>2</sub> doping and microwave sintering to elevate the performance of ZTA ceramics, offering a pathway to superior materials for advanced applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49782-49791"},"PeriodicalIF":5.1,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664369","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-25DOI: 10.1016/j.ceramint.2024.09.287
Peixin Qiao , Ying Yang , Yiping Wang , Jiyang Zhang , Jintao Wu , Lei Zhao , Jikui Liu , Hao Liu , Huihui Liu , Wenbin Tang
The enhanced high-power performance of 0.93 Pb(Zr1-xTix)O3-0.05 Pb(Mn1/3Sb2/3)O3-0.02 Pb(Sc1/2Nb1/2)O3 (x = 0.48, 0.50, 0.52, 0.54, 0.56) piezoelectric ceramics (PZT-PMS-PSN) has been achieved with notable improvement in the piezoelectric coefficient (d33). The presence of the monoclinic phase (Cc) has led to an increase in d33 from 214 pC N−1 to 315 pC N−1. Therefore, the composition 0.93 Pb(Zr0.48Ti0.52)O3-0.05 Pb(Mn1/3Sb2/3)O3-0.02 Pb(Sc1/2Nb1/2)O3 exhibits excellent mechanical and electrical parameters: a d33 value of 315 pC N−1, a high mechanical quality factor of 1578, an electromechanical coupling factor kp of 52 %, and a low dielectric loss tanδ of only 0.288 %. Additionally, this ceramic exhibits a significantly high Curie temperature (Tc), reaching up to 328 °C which stabilizes its ferroelectric phase. Moreover, the phase transition of PZT-PMS-PSN ceramics from rhombohedral to tetragonal phase was investigated by X-ray diffraction, Raman scattering, Piezo-response force microscopy.
0.93 Pb（Zr1-xTix）O3-0.05 Pb（Mn1/3Sb2/3）O3-0.02 Pb（Sc1/2Nb1/2）O3（x = 0.48、0.50、0.52、0.54、0.56）压电陶瓷（PZT-PMS-PSN）的高功率性能得到增强，压电系数（d33）显著提高。单斜相 (Cc) 的存在使 d33 从 214 pC N-1 增加到 315 pC N-1。因此，0.93 Pb（Zr0.48Ti0.52）O3-0.05 Pb（Mn1/3Sb2/3）O3-0.02 Pb（Sc1/2Nb1/2）O3 这种成分具有出色的机械和电气参数：d33 值为 315 pC N-1，机械品质因数高达 1578，机电耦合系数 kp 为 52 %，介电损耗 tanδ 很低，仅为 0.288 %。此外，这种陶瓷的居里温度（Tc）明显较高，最高可达 328 ℃，从而稳定了铁电相。此外，还通过 X 射线衍射、拉曼散射和压电响应力显微镜研究了 PZT-PMS-PSN 陶瓷从斜方相到四方相的相变过程。
{"title":"Enhancing the piezoelectric performance of novel PZT-PMS-PSN piezoelectric ceramics by fine-tuning the monoclinic phase","authors":"Peixin Qiao , Ying Yang , Yiping Wang , Jiyang Zhang , Jintao Wu , Lei Zhao , Jikui Liu , Hao Liu , Huihui Liu , Wenbin Tang","doi":"10.1016/j.ceramint.2024.09.287","DOIUrl":"10.1016/j.ceramint.2024.09.287","url":null,"abstract":"<div><div>The enhanced high-power performance of 0.93 Pb(Zr<sub>1-x</sub>Ti<sub>x</sub>)O<sub>3</sub>-0.05 Pb(Mn<sub>1/3</sub>Sb<sub>2/3</sub>)O<sub>3</sub>-0.02 Pb(Sc<sub>1/2</sub>Nb<sub>1/2</sub>)O<sub>3</sub> (x = 0.48, 0.50, 0.52, 0.54, 0.56) piezoelectric ceramics (PZT-PMS-PSN) has been achieved with notable improvement in the piezoelectric coefficient (d<sub>33</sub>). The presence of the monoclinic phase (<em>C</em>c) has led to an increase in d<sub>33</sub> from 214 pC N<sup>−1</sup> to 315 pC N<sup>−1</sup>. Therefore, the composition 0.93 Pb(Zr<sub>0.48</sub>Ti<sub>0.52</sub>)O<sub>3</sub>-0.05 Pb(Mn<sub>1/3</sub>Sb<sub>2/3</sub>)O<sub>3</sub>-0.02 Pb(Sc<sub>1/2</sub>Nb<sub>1/2</sub>)O<sub>3</sub> exhibits excellent mechanical and electrical parameters: a d<sub>33</sub> value of 315 pC N<sup>−1</sup>, a high mechanical quality factor of 1578, an electromechanical coupling factor k<sub>p</sub> of 52 %, and a low dielectric loss tanδ of only 0.288 %. Additionally, this ceramic exhibits a significantly high Curie temperature (T<sub>c</sub>), reaching up to 328 °C which stabilizes its ferroelectric phase. Moreover, the phase transition of PZT-PMS-PSN ceramics from rhombohedral to tetragonal phase was investigated by X-ray diffraction, Raman scattering, Piezo-response force microscopy.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49426-49436"},"PeriodicalIF":5.1,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664335","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Pub Date : 2024-09-25DOI: 10.1016/j.ceramint.2024.09.254
Shirin Khanmohammadi, Masoomeh Mohtadinia
Alumina-silica based refractories have found vast applications in various industries due to their strong resistance to corrosion and price advantages. In this research work high temperature corrosion resistance of aluminosilicate refractories against silicate melt was investigated. Various refractory brick matrices based on bauxite, chamotte and andalusite were prepared. The microstructure and chemical characteristics before and after corrosion cup test, as well as physical and mechanical properties were evaluated. The results indicated that corrosion resistance is increased in the following order of chamotte < bauxite < andalusite. Chemical composition and porosity were considered as determinant factors influencing corrosion process and mechanical properties of the refractory bricks. Low porosity of the andalusite aggregates raised the corrosion resistance by making limitations for melt infiltration into refractory material. Low mullitization of andalusite reduced the density and mechanical strength in comparison with other aluminosilicates.
{"title":"High temperature corrosion resistance of various aluminosilicate refractory bricks","authors":"Shirin Khanmohammadi, Masoomeh Mohtadinia","doi":"10.1016/j.ceramint.2024.09.254","DOIUrl":"10.1016/j.ceramint.2024.09.254","url":null,"abstract":"<div><div>Alumina-silica based refractories have found vast applications in various industries due to their strong resistance to corrosion and price advantages. In this research work high temperature corrosion resistance of aluminosilicate refractories against silicate melt was investigated. Various refractory brick matrices based on bauxite, chamotte and andalusite were prepared. The microstructure and chemical characteristics before and after corrosion cup test, as well as physical and mechanical properties were evaluated. The results indicated that corrosion resistance is increased in the following order of chamotte < bauxite < andalusite. Chemical composition and porosity were considered as determinant factors influencing corrosion process and mechanical properties of the refractory bricks. Low porosity of the andalusite aggregates raised the corrosion resistance by making limitations for melt infiltration into refractory material. Low mullitization of andalusite reduced the density and mechanical strength in comparison with other aluminosilicates.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"50 23","pages":"Pages 49125-49133"},"PeriodicalIF":5.1,"publicationDate":"2024-09-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"142664284","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":2,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
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