Ceramics International最新文献

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Effects of BN and pyrolytic carbon interface materials on the microstructure and mechanical properties of B4C-SiCf ceramics

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2024.12.540

Bin Wang , Xiaoqing Zhao , Ji Zou , Shuo Liu , Xiaoshuo Zhang , Zihao Zhang , Zhuozhen Guo , Weimin Wang , Zhengyi Fu

The overall reinforcement in fiber-reinforced ceramics is affected by the high-temperature stability of the fiber and stress transfer across the interface material. In this study, the morphology and high-temperature thermal stability of boron nitride (BN)-coated SiC_f (SiC_f/BN) and pyrolytic carbon (PyC)-coated SiC_f (SiC_f/PyC) were investigated at temperatures ranging from 1700 °C to 1800 °C. The BN and PyC coatings mitigated the high-temperature degradation of SiC_f via preferential oxidation, resulting in no noticeable defects on the fiber surface and negligible grain growth within the fibers. The protective effect of the BN interface in B₄C-SiC_f ceramics depended on the sintering temperature because its oxidation and decomposition progressively increased with temperature. A typical fiber pull-out toughening mechanism was exhibited in B₄C–SiC_f/BN composite sintered at 1700 °C. The stress carried by the matrix was transferred to the fibers through the BN interface, which directed crack propagation and enhanced the fracture toughness of the composites. In PyC-coated SiC_f, the consumption of the PyC coating via reaction with B₂O₃ in the B₄C matrix resulted in the ineffective contribution of SiC_f to the toughening of the B₄C ceramics under the experimental conditions. The results of this study provide a valuable foundation for further research in the interface regulation of B₄C–SiC_f ceramic materials.

{"title":"Effects of BN and pyrolytic carbon interface materials on the microstructure and mechanical properties of B4C-SiCf ceramics","authors":"Bin Wang , Xiaoqing Zhao , Ji Zou , Shuo Liu , Xiaoshuo Zhang , Zihao Zhang , Zhuozhen Guo , Weimin Wang , Zhengyi Fu","doi":"10.1016/j.ceramint.2024.12.540","DOIUrl":"10.1016/j.ceramint.2024.12.540","url":null,"abstract":"<div><div>The overall reinforcement in fiber-reinforced ceramics is affected by the high-temperature stability of the fiber and stress transfer across the interface material. In this study, the morphology and high-temperature thermal stability of boron nitride (BN)-coated SiCf (SiCf/BN) and pyrolytic carbon (PyC)-coated SiCf (SiCf/PyC) were investigated at temperatures ranging from 1700 °C to 1800 °C. The BN and PyC coatings mitigated the high-temperature degradation of SiCf via preferential oxidation, resulting in no noticeable defects on the fiber surface and negligible grain growth within the fibers. The protective effect of the BN interface in B4C-SiCf ceramics depended on the sintering temperature because its oxidation and decomposition progressively increased with temperature. A typical fiber pull-out toughening mechanism was exhibited in B4C–SiCf/BN composite sintered at 1700 °C. The stress carried by the matrix was transferred to the fibers through the BN interface, which directed crack propagation and enhanced the fracture toughness of the composites. In PyC-coated SiCf, the consumption of the PyC coating via reaction with B2O3 in the B4C matrix resulted in the ineffective contribution of SiCf to the toughening of the B4C ceramics under the experimental conditions. The results of this study provide a valuable foundation for further research in the interface regulation of B4C–SiCf ceramic materials.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11231-11240"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815141","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}

引用次数: 0

Effects of dopants with varying cationic radii on the mechanical properties and hydrothermal aging stability of dental 3Y-TZP ceramics fabricated via vat photopolymerization

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.038

Yang Sheng , Li Wang , Rui Dou , Fangyong Zhu , Yufeng Gao

In this study, the mechanical properties and hydrothermal aging stability of small amounts of cation dopant M-doped 3Y-TZP (M = Er₂O₃, CeO₂, Nb₂O₅) prepared via vat photopolymerization were investigated. Four zirconia ceramic slurries with high solid content (58 vol%) and low viscosity were prepared by adding three different dopants, along with an undoped control. The phase composition and lattice parameters were analyzed using X-ray diffraction (XRD) and Rietveld refinement. The microstructure was examined via scanning electron microscopy (SEM). Mechanical properties were evaluated for hardness, toughness and the three-point flexural strength with Weibull analysis. Hydrothermal aging stability was also assessed. The dopants had little effect regarding the shrinkage and density of the ceramics in comparison to the undoped ceramics. However, the average grain size of sintered 3Y-TZP at 1500 °C increased with dopant addition. X-ray diffraction showed that both doped and undoped ceramics were predominantly tetragonal, although the monoclinic phase content increased with doping. The doped ceramics also exhibited improved fracture toughness. After 20 h of low-temperature degradation (LTD), 3Y-TZP ceramics exhibited a time-dependent transformation from the tetragonal to the monoclinic phase during aging, with the monoclinic phase content in the Er₂O₃-doped 3Y-TZP reaching only 18.30 %. Additionally, Er₂O₃-doped 3Y-TZP exhibited lower tetragonality (c/a√2 = 1.0142) and demonstrated flexural strength exceeding 800 MPa. Dental Er₂O₃-doped 3Y-TZP, prepared using the VPP technology, demonstrates high LTD resistance and excellent mechanical properties.

{"title":"Effects of dopants with varying cationic radii on the mechanical properties and hydrothermal aging stability of dental 3Y-TZP ceramics fabricated via vat photopolymerization","authors":"Yang Sheng , Li Wang , Rui Dou , Fangyong Zhu , Yufeng Gao","doi":"10.1016/j.ceramint.2025.01.038","DOIUrl":"10.1016/j.ceramint.2025.01.038","url":null,"abstract":"<div><div>In this study, the mechanical properties and hydrothermal aging stability of small amounts of cation dopant M-doped 3Y-TZP (M = Er2O3, CeO2, Nb2O5) prepared via vat photopolymerization were investigated. Four zirconia ceramic slurries with high solid content (58 vol%) and low viscosity were prepared by adding three different dopants, along with an undoped control. The phase composition and lattice parameters were analyzed using X-ray diffraction (XRD) and Rietveld refinement. The microstructure was examined via scanning electron microscopy (SEM). Mechanical properties were evaluated for hardness, toughness and the three-point flexural strength with Weibull analysis. Hydrothermal aging stability was also assessed. The dopants had little effect regarding the shrinkage and density of the ceramics in comparison to the undoped ceramics. However, the average grain size of sintered 3Y-TZP at 1500 °C increased with dopant addition. X-ray diffraction showed that both doped and undoped ceramics were predominantly tetragonal, although the monoclinic phase content increased with doping. The doped ceramics also exhibited improved fracture toughness. After 20 h of low-temperature degradation (LTD), 3Y-TZP ceramics exhibited a time-dependent transformation from the tetragonal to the monoclinic phase during aging, with the monoclinic phase content in the Er2O3-doped 3Y-TZP reaching only 18.30 %. Additionally, Er2O3-doped 3Y-TZP exhibited lower tetragonality (c/a√2 = 1.0142) and demonstrated flexural strength exceeding 800 MPa. Dental Er2O3-doped 3Y-TZP, prepared using the VPP technology, demonstrates high LTD resistance and excellent mechanical properties.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11857-11870"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815150","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}

引用次数: 0

Enhanced voltage stability of TiO2-based ceramics with colossal permittivity induced by multiple acceptors doping

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.039

Yang Yu , Ziyue Zhou , Siyuan Li , Xuan Gao , Yu Feng , Weidong Fei , Qingguo Chen

In view of the demands for colossal permittivity materials in rapidly soaring developments of modern electronics and energy storage, the high dielectric performance co-doped TiO₂ ceramics often suffer from their low voltage stability and poor electrical insulation. Exploring the method of improving the withstand voltage strength and voltage stability for colossal permittivity materials is necessary. In this work, Tb³⁺ was added in (Ta_0.5Tb_xAl_0.5-x)_0.02Ti_0.98O₂ to investigate the effect of defect complex formed by co-dopants on microstructure, permittivity and current density performance. The results indicated that the addition of Tb³⁺ could enhance the permittivity to above 10⁵, featuring excellent frequency-stability. Moreover, the current density of (Ta_0.5Tb_xAl_0.5-x)_0.02Ti_0.98O₂ ceramics with x value of 0.1 was reduced three orders of magnitude. This work provides a new strategy for enhance the permittivity and voltage stability of TiO₂-based CP materials by addition two acceptors with large-radius distinction.

{"title":"Enhanced voltage stability of TiO2-based ceramics with colossal permittivity induced by multiple acceptors doping","authors":"Yang Yu , Ziyue Zhou , Siyuan Li , Xuan Gao , Yu Feng , Weidong Fei , Qingguo Chen","doi":"10.1016/j.ceramint.2025.01.039","DOIUrl":"10.1016/j.ceramint.2025.01.039","url":null,"abstract":"<div><div>In view of the demands for colossal permittivity materials in rapidly soaring developments of modern electronics and energy storage, the high dielectric performance co-doped TiO2 ceramics often suffer from their low voltage stability and poor electrical insulation. Exploring the method of improving the withstand voltage strength and voltage stability for colossal permittivity materials is necessary. In this work, Tb3+ was added in (Ta0.5TbxAl0.5-x)0.02Ti0.98O2 to investigate the effect of defect complex formed by co-dopants on microstructure, permittivity and current density performance. The results indicated that the addition of Tb3+ could enhance the permittivity to above 105, featuring excellent frequency-stability. Moreover, the current density of (Ta0.5TbxAl0.5-x)0.02Ti0.98O2 ceramics with x value of 0.1 was reduced three orders of magnitude. This work provides a new strategy for enhance the permittivity and voltage stability of TiO2-based CP materials by addition two acceptors with large-radius distinction.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11871-11877"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815151","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}

引用次数: 0

Crystal growth mechanism of nano nSc-Y/ZrO2 ceramic powders prepared by co-precipitation method

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.040

Ju Zhou , Na Zheng , Chunmei Liu , Yibing Wu , Mamdouh Omran , Ju Tang , Fan Zhang , Guo Chen

The method of co-precipitation is shown to yield nSc-Y/ZrO₂ composite nanopowders with high density, good dispersion and crystallinity. Furthermore, the samples without Sc doping were mainly comprised of monoclinic ZrO₂ phase and trace amounts of tetragonal ZrO₂, whereas with the addition of Sc, the powders showed a great deal of tetragonal ZrO₂ structure and a minor quantity of cubic phase ZrO₂. By comparing the sintered specimens with undoped Sc and other sintered specimens with different dopant contents, it was found that the sintered samples with a doping ration of 6Sc-2Y-92Zr have denser microstructures as well as smaller activation energies for grain growth (162.48 kJ/mol). Notably, the sintering shrinkage of nSc-Y/ZrO₂ ceramic powders with different dopant contents increases first and then decreases. The maximum linear shrinkage (41.67 %) and volumetric shrinkage (3.11 %) are observed at 6Sc-2Y-92Zr. Therefore, the addition of Sc helps to promote the degree of sintering of the Sc₂O₃-Y₂O₃-ZrO₂ samples, but too much Sc leads to a smaller final shrinkage. The nSc-Y/ZrO₂ nanopowders prepared in this experiment can be used to prepare nanoceramics with high density, high dispersion, and good crystallinity, which are good candidates for defense industry, thermal barrier coating.

{"title":"Crystal growth mechanism of nano nSc-Y/ZrO2 ceramic powders prepared by co-precipitation method","authors":"Ju Zhou , Na Zheng , Chunmei Liu , Yibing Wu , Mamdouh Omran , Ju Tang , Fan Zhang , Guo Chen","doi":"10.1016/j.ceramint.2025.01.040","DOIUrl":"10.1016/j.ceramint.2025.01.040","url":null,"abstract":"<div><div>The method of co-precipitation is shown to yield nSc-Y/ZrO2 composite nanopowders with high density, good dispersion and crystallinity. Furthermore, the samples without Sc doping were mainly comprised of monoclinic ZrO2 phase and trace amounts of tetragonal ZrO2, whereas with the addition of Sc, the powders showed a great deal of tetragonal ZrO2 structure and a minor quantity of cubic phase ZrO2. By comparing the sintered specimens with undoped Sc and other sintered specimens with different dopant contents, it was found that the sintered samples with a doping ration of 6Sc-2Y-92Zr have denser microstructures as well as smaller activation energies for grain growth (162.48 kJ/mol). Notably, the sintering shrinkage of nSc-Y/ZrO2 ceramic powders with different dopant contents increases first and then decreases. The maximum linear shrinkage (41.67 %) and volumetric shrinkage (3.11 %) are observed at 6Sc-2Y-92Zr. Therefore, the addition of Sc helps to promote the degree of sintering of the Sc2O3-Y2O3-ZrO2 samples, but too much Sc leads to a smaller final shrinkage. The nSc-Y/ZrO2 nanopowders prepared in this experiment can be used to prepare nanoceramics with high density, high dispersion, and good crystallinity, which are good candidates for defense industry, thermal barrier coating.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11878-11888"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815152","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}

引用次数: 0

Evaluating the synergistic effect of Cu/Zr co-doped Co3O4@CNTs nanocomposite for removal of drugs and dyes from industrial wastewater

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.042

Fatima Tariq , Umaira Rafiq , Sofia Siddique , Zeid A. ALOthman , Imran Shakir , Muhammad Farooq Warsi

Water treatment faces challenges due to the low efficiency and stability of current photocatalysts in degrading persistent pollutants in wastewater. A photocatalyst should have a larger surface area, better electronic conductivity, a minimum charge recombination rate, and a visible light active narrow optical band gap probability. The Co₃O₄ (CO) and Cu/Zr co-doped Co₃O₄ (CZCO) were synthesized by the co-precipitation route. Then carbon nanotubes (CNTs) were incorporated via ultrasonication route to enhance their efficiency by increasing surface area and tuning the band gap energy. The degradation of two model pollutants, Amoxicillin (AMX) and Bromothymol blue dye (BTB), investigated the photocatalytic efficiency of the fabricated samples. Characterization techniques, like FTIR, XRD, UV–visible spectroscopy, photoluminous spectroscopy, EDX, SEM, and TOC analyses confirmed the successful fabrication. Electrical conductivity and charge transfer resistance were analyzed by Mott Schottky and EIS analysis, respectively. Cu/Zr co-doped Co₃O₄@CNTs (CZCO/C) showed 83.45 % AMX and 89.55 % BTB degradation within 90 min. CZCO/C showed enhanced performance due to reduced bandgap energy, and charge recombination rate than CO and CZCO. Overall, the results indicated that the CZCO/C nanocomposite is a promising material for effective photocatalytic applications in environmental remediation.

{"title":"Evaluating the synergistic effect of Cu/Zr co-doped Co3O4@CNTs nanocomposite for removal of drugs and dyes from industrial wastewater","authors":"Fatima Tariq , Umaira Rafiq , Sofia Siddique , Zeid A. ALOthman , Imran Shakir , Muhammad Farooq Warsi","doi":"10.1016/j.ceramint.2025.01.042","DOIUrl":"10.1016/j.ceramint.2025.01.042","url":null,"abstract":"<div><div>Water treatment faces challenges due to the low efficiency and stability of current photocatalysts in degrading persistent pollutants in wastewater. A photocatalyst should have a larger surface area, better electronic conductivity, a minimum charge recombination rate, and a visible light active narrow optical band gap probability. The Co3O4 (CO) and Cu/Zr co-doped Co3O4 (CZCO) were synthesized by the co-precipitation route. Then carbon nanotubes (CNTs) were incorporated via ultrasonication route to enhance their efficiency by increasing surface area and tuning the band gap energy. The degradation of two model pollutants, Amoxicillin (AMX) and Bromothymol blue dye (BTB), investigated the photocatalytic efficiency of the fabricated samples. Characterization techniques, like FTIR, XRD, UV–visible spectroscopy, photoluminous spectroscopy, EDX, SEM, and TOC analyses confirmed the successful fabrication. Electrical conductivity and charge transfer resistance were analyzed by Mott Schottky and EIS analysis, respectively. Cu/Zr co-doped Co3O4@CNTs (CZCO/C) showed 83.45 % AMX and 89.55 % BTB degradation within 90 min. CZCO/C showed enhanced performance due to reduced bandgap energy, and charge recombination rate than CO and CZCO. Overall, the results indicated that the CZCO/C nanocomposite is a promising material for effective photocatalytic applications in environmental remediation.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 9","pages":"Pages 11899-11913"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143815154","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}

引用次数: 0

Optimization of thermoelectric performance in BiCuSeO-based materials by constructing Cu2Se composite interface 通过构建 Cu2Se 复合界面优化 BiCuSeO 基材料的热电性能

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2024.12.551

Ying Lei , Chao Yong , Jin Qiu , Yu Li , Lin Xu , Fan Ye , Shaowu Zhang , Dongsheng Wang , Guobin Ni

BiCuSeO-Cu₂Se composite thermoelectric bulks were fabricated via 4 min microwave heating and 5 min spark plasma sintering. The maximization of electrical conductivity through the percolation effect leads to a significant increase in the power factor to 844.06 μWm⁻¹K⁻². Based on the introduced various microstructures such as point defects, stacking fault and CaO nanoprecipitates, the Cu₂Se phase further formed BiCuSeO/Cu₂Se interfaces, thus intensifying the phonon scattering and reducing the lattice thermal conductivity of the Bi_0.88Ca_0.06Pb_0.06CuSeO+10 wt% Cu₂Se sample to 0.18 W m⁻¹K⁻¹, with the final ZT value reaching a maximum of 1.23 at 873 K.

引用次数: 0

External stress switching water corrosion behavior of SiC

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2024.08.303

Yang Wang , Junting Li , Yexin Li , Yiqin Huang , Junyu Bin , Chen Xiao , Yangyang Lu , Lei Chen , Jingxiang Xu , Yixin Su , Pengfei Shi , Linmao Qian

As the promising thermal material for the hot-end components of the next-generation advanced gas turbine engines, the operation of SiC is threatened by high-temperature water corrosion accompanied by external stress. By using reactive molecular dynamics, the influence of external stress on the high-temperature water corrosion behavior of SiC material was investigated in this study. It was found that the water corrosion behaviors of SiC at 1000 K and 2000 K were quite different: At 1000 K, SiC slabs under tensile stress exhibited more severe corrosion, as evidenced by a greater number of atoms lost. In contrast, at 2000 K, the volatilization of Si–O–Si group diminished with the increase in external stress, resulting in a reduced loss of silicon atoms. Moreover, the atomic insights indicated that the greater number of bond bridges between the Si–O–Si group and tensile SiC slab led to the more stable existence of the Si–O–Si group as well as less loss of silicon atoms. This study not only could help to understand the influence of the slab stress on the high-temperature water corrosion of SiC materials but also contribute to the design of SiC hot end components.

{"title":"External stress switching water corrosion behavior of SiC","authors":"Yang Wang , Junting Li , Yexin Li , Yiqin Huang , Junyu Bin , Chen Xiao , Yangyang Lu , Lei Chen , Jingxiang Xu , Yixin Su , Pengfei Shi , Linmao Qian","doi":"10.1016/j.ceramint.2024.08.303","DOIUrl":"10.1016/j.ceramint.2024.08.303","url":null,"abstract":"<div><div>As the promising thermal material for the hot-end components of the next-generation advanced gas turbine engines, the operation of SiC is threatened by high-temperature water corrosion accompanied by external stress. By using reactive molecular dynamics, the influence of external stress on the high-temperature water corrosion behavior of SiC material was investigated in this study. It was found that the water corrosion behaviors of SiC at 1000 K and 2000 K were quite different: At 1000 K, SiC slabs under tensile stress exhibited more severe corrosion, as evidenced by a greater number of atoms lost. In contrast, at 2000 K, the volatilization of Si–O–Si group diminished with the increase in external stress, resulting in a reduced loss of silicon atoms. Moreover, the atomic insights indicated that the greater number of bond bridges between the Si–O–Si group and tensile SiC slab led to the more stable existence of the Si–O–Si group as well as less loss of silicon atoms. This study not only could help to understand the influence of the slab stress on the high-temperature water corrosion of SiC materials but also contribute to the design of SiC hot end components.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 10","pages":"Pages 12323-12329"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814773","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}

引用次数: 0

Evaluation of antimicrobial, cytotoxic, antioxidant and photocatalytic properties of Ni-doped TiO2 nanoparticles produced in green method

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.132

Vindhya P S , Sandhya Suresh , Kavitha V T

In healthcare facilities, the rapid emergence of multidrug-resistant pathogenic bacteria necessitates the development of novel strategies to control or prevent their spread. Hence, current research focuses on the fabrication of pure and Ni-doped TiO₂ nanoparticles via green approach by employing aqueous extracts of A.muricata leaves. XRD, FTIR, XPS, HR-TEM, SAED, SEM, EDX, UV–Visible and TGA are used to examine structural, morphological, optical and thermal properties of the obtained nanopowder. XRD pattern reveals all samples have crystalline nature and exhibit the tetragonal anatase phase of TiO₂. XPS measurements confirm successful incorporation of Ni²⁺ ions into the TiO₂ host lattice. FTIR spectra represent the presence of diverse functional groups along with their vibrational modes. The presence of Ti, O and Ni in EDAX spectra indicates sample purity. Moreover, TiO₂ nanoparticles have a significant cytotoxic effect on L929 normal fibroblast cell lines. Additionally, the DPPH radical scavenging method is used to investigate antioxidant properties. Antimicrobial activity of nanoparticles was assessed against various microbial and fungal strains. Also, photocatalytic action was evaluated for methylene blue and congo red dye degradation in the presence aqueous solution under direct irradiation of sunlight. Thus, the findings suggest A. muricata leaf extract can be utilized for the design and fabrication of pure and Ni-doped TiO₂ nanoparticles, as well as a variety of biomedical and photocatalytic applications.

{"title":"Evaluation of antimicrobial, cytotoxic, antioxidant and photocatalytic properties of Ni-doped TiO2 nanoparticles produced in green method","authors":"Vindhya P S , Sandhya Suresh , Kavitha V T","doi":"10.1016/j.ceramint.2025.01.132","DOIUrl":"10.1016/j.ceramint.2025.01.132","url":null,"abstract":"<div><div>In healthcare facilities, the rapid emergence of multidrug-resistant pathogenic bacteria necessitates the development of novel strategies to control or prevent their spread. Hence, current research focuses on the fabrication of pure and Ni-doped TiO2 nanoparticles via green approach by employing aqueous extracts of A.muricata leaves. XRD, FTIR, XPS, HR-TEM, SAED, SEM, EDX, UV–Visible and TGA are used to examine structural, morphological, optical and thermal properties of the obtained nanopowder. XRD pattern reveals all samples have crystalline nature and exhibit the tetragonal anatase phase of TiO2. XPS measurements confirm successful incorporation of Ni2+ ions into the TiO2 host lattice. FTIR spectra represent the presence of diverse functional groups along with their vibrational modes. The presence of Ti, O and Ni in EDAX spectra indicates sample purity. Moreover, TiO2 nanoparticles have a significant cytotoxic effect on L929 normal fibroblast cell lines. Additionally, the DPPH radical scavenging method is used to investigate antioxidant properties. Antimicrobial activity of nanoparticles was assessed against various microbial and fungal strains. Also, photocatalytic action was evaluated for methylene blue and congo red dye degradation in the presence aqueous solution under direct irradiation of sunlight. Thus, the findings suggest A. muricata leaf extract can be utilized for the design and fabrication of pure and Ni-doped TiO2 nanoparticles, as well as a variety of biomedical and photocatalytic applications.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 10","pages":"Pages 12901-12917"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814784","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}

引用次数: 0

Theoretical screening and experimental fabrication of metallized layer for enhanced Cu wetting and adhesion on Si3N4 substrate

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.137

Zhang Xiangzhao, Zhou Yansheng, Zhang Yinuo, Chen Kerou, Liu Guiwu, Qiao Guanjun

A computational screening and experimental fabrication of metallized layer was developed to improve the interfacial binding strength of Cu/Si₃N₄ system in this work. The suitable metallized layer was computational screened based on the melting point, coefficient of thermal expansion, the solid solubility with Cu metal and the work of adhesion of metal/Si₃N₄ interface sequentially. Then, the Si₃N₄ copper-clad laminate (Si₃N₄ CCL) with Cu/metallized layer/Si₃N₄ structure was fabricated and the corresponding mechanical and electrical performances were further tested and discussed. The results show that Ni was the most suitable metallized layer considering the highest work of adhesion with Si₃N₄ ceramic compared with other promising metals. The sintered Ni layer with suitable screen-printing passes shows a uniform porous morphology, characterized by evenly distributed pore sizes that contribute to its overall structural integrity. And Ni layer exhibits a defect-free interface with the Si₃N₄ substrate, ensuring strong interfacial adhesion. The molten Cu presents planar spreading and vertical infiltration state on/in the sintered Ni layer in the subsequent Cu coating process, forming a dense metallized layer coupled with the typical equiaxed grain under the condition of suitable Cu-sheet mass. However, the over accumulation of Cu-rich phase at the interface derived from the excessive Cu-sheet mass can deteriorate the interfacial binding strength between the metal and Si₃N₄. Moreover, the fabricated Si₃N₄ CCL with a defect-free metal layer and interface structure presents excellent interfacial binding and surface conductivity, which can facilitate the vertical heat conduction across the interface and planar electron transport in the actual application. This study provides a new strategy for designing and fabricating the Si₃N₄ CCL.

{"title":"Theoretical screening and experimental fabrication of metallized layer for enhanced Cu wetting and adhesion on Si3N4 substrate","authors":"Zhang Xiangzhao, Zhou Yansheng, Zhang Yinuo, Chen Kerou, Liu Guiwu, Qiao Guanjun","doi":"10.1016/j.ceramint.2025.01.137","DOIUrl":"10.1016/j.ceramint.2025.01.137","url":null,"abstract":"<div><div>A computational screening and experimental fabrication of metallized layer was developed to improve the interfacial binding strength of Cu/Si3N4 system in this work. The suitable metallized layer was computational screened based on the melting point, coefficient of thermal expansion, the solid solubility with Cu metal and the work of adhesion of metal/Si3N4 interface sequentially. Then, the Si3N4 copper-clad laminate (Si3N4 CCL) with Cu/metallized layer/Si3N4 structure was fabricated and the corresponding mechanical and electrical performances were further tested and discussed. The results show that Ni was the most suitable metallized layer considering the highest work of adhesion with Si3N4 ceramic compared with other promising metals. The sintered Ni layer with suitable screen-printing passes shows a uniform porous morphology, characterized by evenly distributed pore sizes that contribute to its overall structural integrity. And Ni layer exhibits a defect-free interface with the Si3N4 substrate, ensuring strong interfacial adhesion. The molten Cu presents planar spreading and vertical infiltration state on/in the sintered Ni layer in the subsequent Cu coating process, forming a dense metallized layer coupled with the typical equiaxed grain under the condition of suitable Cu-sheet mass. However, the over accumulation of Cu-rich phase at the interface derived from the excessive Cu-sheet mass can deteriorate the interfacial binding strength between the metal and Si3N4. Moreover, the fabricated Si3N4 CCL with a defect-free metal layer and interface structure presents excellent interfacial binding and surface conductivity, which can facilitate the vertical heat conduction across the interface and planar electron transport in the actual application. This study provides a new strategy for designing and fabricating the Si3N4 CCL.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 10","pages":"Pages 12940-12950"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814788","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}

引用次数: 0

Boosting the electrochemical performance of ternary metal oxide anode in lithium-ion batteries via biomass-derived carbon nanodot modification

IF 5.1 2区材料科学 Q1 MATERIALS SCIENCE, CERAMICS

Ceramics International

Pub Date : 2025-04-01 DOI: 10.1016/j.ceramint.2025.01.117

Billur Deniz Karahan , Mehmet Feryat Gülcan

Transition metal oxides deliver high capacity but demonstrate a short cycle life when they are utilized as the anode active material in lithium ion batteries. This study offers an innovative solution to this problem by designing new composite materials in which, the modification of ternary transition metal oxide by carbon nanodots is utilized. Carbon nanodots isolated from Phoenix Dactylifera L. seeds are used by the authors for the first time to process hydrothermally produced zinc nickel ferrite powders. Subsequently, the combination is treated in a rotating evaporator to provide a uniform mix. Then, the finished product is heated to 600 °C in air. Once these powders (ternary metal oxide from hydrothermal (Sample 1) and C-dot modified ternary metal oxide (Sample 2)) are utilized as anode active materials, Sample 2 performs 1224.74 mAh g⁻¹ at the 200th cycles upon the application of 0.1 mA g⁻¹ current load in cycling. Sample 2 tested under various current loads ranging from 0.1 to 2 A g⁻¹ it delivers 1229.08 mAh g⁻¹ at the 270th cycle. It is thus demonstrated that through careful material selection and process design it is possible to synthesize sustainable anode active materials that could withstand high current loads, with long cycle life. It is anticipated that the encouraging outcomes of this study would open up new vistas to design sustainable composite anode active materials.

{"title":"Boosting the electrochemical performance of ternary metal oxide anode in lithium-ion batteries via biomass-derived carbon nanodot modification","authors":"Billur Deniz Karahan , Mehmet Feryat Gülcan","doi":"10.1016/j.ceramint.2025.01.117","DOIUrl":"10.1016/j.ceramint.2025.01.117","url":null,"abstract":"<div><div>Transition metal oxides deliver high capacity but demonstrate a short cycle life when they are utilized as the anode active material in lithium ion batteries. This study offers an innovative solution to this problem by designing new composite materials in which, the modification of ternary transition metal oxide by carbon nanodots is utilized. Carbon nanodots isolated from Phoenix Dactylifera L. seeds are used by the authors for the first time to process hydrothermally produced zinc nickel ferrite powders. Subsequently, the combination is treated in a rotating evaporator to provide a uniform mix. Then, the finished product is heated to 600 °C in air. Once these powders (ternary metal oxide from hydrothermal (Sample 1) and C-dot modified ternary metal oxide (Sample 2)) are utilized as anode active materials, Sample 2 performs 1224.74 mAh g−1 at the 200th cycles upon the application of 0.1 mA g−1 current load in cycling. Sample 2 tested under various current loads ranging from 0.1 to 2 A g−1 it delivers 1229.08 mAh g−1 at the 270th cycle. It is thus demonstrated that through careful material selection and process design it is possible to synthesize sustainable anode active materials that could withstand high current loads, with long cycle life. It is anticipated that the encouraging outcomes of this study would open up new vistas to design sustainable composite anode active materials.</div></div>","PeriodicalId":267,"journal":{"name":"Ceramics International","volume":"51 10","pages":"Pages 12785-12795"},"PeriodicalIF":5.1,"publicationDate":"2025-04-01","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"143814884","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}

引用次数: 0

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