Pub Date : 2026-01-26DOI: 10.1016/j.jeurceramsoc.2026.118175
Yingze Li , Yao Yao , Rui Zhang , Mengdi Zhang , Jing Wang , Lei Zhao
Li-doping has been demonstrated to be effective in enhancing ferroelectric and piezoelectric properties of AgNbO3-based ceramics via promoting antiferroelectric/ferrielectric (AFE/FIE) to ferroelectric (FE) phase transition. In this work, the phase structure, FE properties and piezoelectric properties of (Ag1-xLix)NbO3 ceramics with x = 0.02–0.07 are investigated. (Ag1-xLix)NbO3 ceramics undergo a phase transition from FIE to FE phase as x increases from 0.02 to 0.07 with FIE phase at x = 0.02–0.04, a coexistence of AFE and FE phases at x = 0.05, and FE phase at x = 0.06–0.07 at room temperature. The piezoelectric coefficient (d33) is 74 pC/N in (Ag0.94Li0.06)NbO3 ceramic, and increases to 92 pC/N at FE-AFE phase boundary. The relationship between d33 and phase structure is elucidated via temperature-dependent d33 and dielectric measurements. This work provides further insights into the tunable phase structures of AgNbO3-based ceramics and their potential applications in next-generation multi-sensing devices.
{"title":"Phase structure, ferroelectric and piezoelectric properties in (Ag,Li)NbO3 ceramics","authors":"Yingze Li , Yao Yao , Rui Zhang , Mengdi Zhang , Jing Wang , Lei Zhao","doi":"10.1016/j.jeurceramsoc.2026.118175","DOIUrl":"10.1016/j.jeurceramsoc.2026.118175","url":null,"abstract":"<div><div>Li-doping has been demonstrated to be effective in enhancing ferroelectric and piezoelectric properties of AgNbO<sub>3</sub>-based ceramics via promoting antiferroelectric/ferrielectric (AFE/FIE) to ferroelectric (FE) phase transition. In this work, the phase structure, FE properties and piezoelectric properties of (Ag<sub>1-<em>x</em></sub>Li<sub><em>x</em></sub>)NbO<sub>3</sub> ceramics with <em>x</em> = 0.02–0.07 are investigated. (Ag<sub>1-<em>x</em></sub>Li<sub><em>x</em></sub>)NbO<sub>3</sub> ceramics undergo a phase transition from FIE to FE phase as <em>x</em> increases from 0.02 to 0.07 with FIE phase at <em>x</em> = 0.02–0.04, a coexistence of AFE and FE phases at <em>x</em> = 0.05, and FE phase at <em>x</em> = 0.06–0.07 at room temperature. The piezoelectric coefficient (<em>d</em><sub>33</sub>) is 74 pC/N in (Ag<sub>0.94</sub>Li<sub>0.06</sub>)NbO<sub>3</sub> ceramic, and increases to 92 pC/N at FE-AFE phase boundary. The relationship between <em>d</em><sub>33</sub> and phase structure is elucidated via temperature-dependent <em>d</em><sub>33</sub> and dielectric measurements. This work provides further insights into the tunable phase structures of AgNbO<sub>3</sub>-based ceramics and their potential applications in next-generation multi-sensing devices.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118175"},"PeriodicalIF":6.2,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191580","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 : 2026-01-26DOI: 10.1016/j.jeurceramsoc.2026.118176
Rui Zhao , Chao Ma , Hongtian He , Daoyang Han , Hongxia Lu , Hongliang Xu , Hailong Wang , Rui Zhang , Linan An , Gang Shao
The inherently strong covalent and ionic bonds of ceramics severely limit their plastic formability at low temperatures, which restricts their wide applications in complex-shaped components. In this study, we demonstrate a flash-activated deep drawing approach that enables ultrafast plastic forming of 3 mol% yttria-stabilized zirconia at a low furnace temperature of 800 °C and a high forming speed of 8 mm/min, which represents a substantial improvement over the extreme conditions typically required in conventional ceramic forming (1450–1750 °C, ˂0.6 mm/min) and other field-assisted forming studies (1400–1600 °C, ∼ 0.1 mm/min). Furthermore, region-specific forming experiments indicate that the anode and middle regions of the sample show better formability than the cathode region, owing to higher local temperatures and fewer vacancy-related defects. The abundant dislocations suggest that deformation is governed by dislocation-accommodated grain-boundary sliding, with electric field/current-enhanced diffusion further promoting grain-boundary accommodation and acting synergistically with dislocation activity.
{"title":"Flash-activated low-temperature ultrafast shaping of ZrO2 ceramics","authors":"Rui Zhao , Chao Ma , Hongtian He , Daoyang Han , Hongxia Lu , Hongliang Xu , Hailong Wang , Rui Zhang , Linan An , Gang Shao","doi":"10.1016/j.jeurceramsoc.2026.118176","DOIUrl":"10.1016/j.jeurceramsoc.2026.118176","url":null,"abstract":"<div><div>The inherently strong covalent and ionic bonds of ceramics severely limit their plastic formability at low temperatures, which restricts their wide applications in complex-shaped components. In this study, we demonstrate a flash-activated deep drawing approach that enables ultrafast plastic forming of 3 mol% yttria-stabilized zirconia at a low furnace temperature of 800 °C and a high forming speed of 8 mm/min, which represents a substantial improvement over the extreme conditions typically required in conventional ceramic forming (1450–1750 °C, ˂0.6 mm/min) and other field-assisted forming studies (1400–1600 °C, ∼ 0.1 mm/min). Furthermore, region-specific forming experiments indicate that the anode and middle regions of the sample show better formability than the cathode region, owing to higher local temperatures and fewer vacancy-related defects. The abundant dislocations suggest that deformation is governed by dislocation-accommodated grain-boundary sliding, with electric field/current-enhanced diffusion further promoting grain-boundary accommodation and acting synergistically with dislocation activity.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118176"},"PeriodicalIF":6.2,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191583","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 : 2026-01-26DOI: 10.1016/j.jeurceramsoc.2026.118174
Haoyuan Li , Mohsen Asle Zaeem
This work investigates the role of oxygen vacancies at grain boundaries in governing the ferroelastic behavior of tetragonal prime yttria-stabilized zirconia (t’-YSZ). Using molecular dynamics simulations, ferroelastic domains are induced via quenching and subsequently subjected to mechanical deformation to assess the effects of oxygen vacancy concentration and spatial distribution on domain switching. A Buckingham interatomic potential is employed to capture both t’-YSZ phase formation and ferroelastic domain switching. The results reveal that oxygen vacancy accumulation inhibits domain formation and suppresses ferroelastic reorientation via pinning effects, particularly near grain boundaries. These findings show that grain boundaries act as major sites of oxygen vacancy accumulation, with their structural geometry controlling how vacancies redistribute under compression and tension, thereby directly shaping the ferroelastic switching behavior of t’-YSZ.
{"title":"Effect of oxygen vacancies at grain boundaries on ferroelastic behavior of yttria stabilized zirconia","authors":"Haoyuan Li , Mohsen Asle Zaeem","doi":"10.1016/j.jeurceramsoc.2026.118174","DOIUrl":"10.1016/j.jeurceramsoc.2026.118174","url":null,"abstract":"<div><div>This work investigates the role of oxygen vacancies at grain boundaries in governing the ferroelastic behavior of tetragonal prime yttria-stabilized zirconia (t’-YSZ). Using molecular dynamics simulations, ferroelastic domains are induced via quenching and subsequently subjected to mechanical deformation to assess the effects of oxygen vacancy concentration and spatial distribution on domain switching. A Buckingham interatomic potential is employed to capture both t’-YSZ phase formation and ferroelastic domain switching. The results reveal that oxygen vacancy accumulation inhibits domain formation and suppresses ferroelastic reorientation via pinning effects, particularly near grain boundaries. These findings show that grain boundaries act as major sites of oxygen vacancy accumulation, with their structural geometry controlling how vacancies redistribute under compression and tension, thereby directly shaping the ferroelastic switching behavior of t’-YSZ.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 9","pages":"Article 118174"},"PeriodicalIF":6.2,"publicationDate":"2026-01-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146191687","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 : 2026-01-24DOI: 10.1016/j.jeurceramsoc.2026.118169
Xiaomei Zeng , Heng Jiang , Rakhimbergan Rakhimov , Shavkat Yuldashev , Changwei Zou , Jun Zhang , Oleksandr Pohrebniak , Bing Yang , Sheng Liu , Vasiliy O. Pelenovich
Piezoelectric AlN thick films doped with Cr, Cu, Nb, Sc, Ta, Ti, Y, Zn, and Zr were deposited on Si and stainless-steel substrates using reactive RF magnetron sputtering. Planar Al sputter target with asymmetrically embedded disk of doping metal was employed in this study. The concentration of doping metal in the deposited films was a function of the distance between the substrate and the inlaid disk. Analysis of the film structure showed that, with the exception of ScAlN and ZnAlN films, the columnar structure and piezoelectric response of doped films were gradually degraded with increasing metal concentration. The piezoelectric d33eff constants of ScAlN (6.7 at% of Sc), ZnAlN (1.6 at% of Zn), NbAlN (1.2 at% of Nb), TiAlN (0.7 at% of Ti), and AlN films are 10.1 ± 0.5 pC/N, 5.3 ± 0.5 pC/N, 5.2 ± 0.5 pC/N, 5.2 ± 0.5 pC/N, and 5.6 ± 0.5 pC/N, respectively. Pulse-echo response of these films was studied using ultrasonic transducers and correlation between their piezoelectric d33eff constant and amplitude of the response was found.
采用反应性射频磁控溅射技术在Si和不锈钢衬底上制备了掺杂Cr、Cu、Nb、Sc、Ta、Ti、Y、Zn和Zr的压电AlN厚膜。采用不对称嵌入掺杂金属盘的平面铝溅射靶。沉积膜中掺杂金属的浓度是衬底与镶嵌盘之间距离的函数。对薄膜结构的分析表明，除了ScAlN和ZnAlN薄膜外，掺杂薄膜的柱状结构和压电响应随着金属浓度的增加而逐渐退化。的压电d33eff常量ScAlN (Sc) 6.7 %,ZnAlN锌(1.6 %),NbAlN Nb(1.2 %),TiAlN (Ti) 0.7 %,和AlN电影10.1 ±0.5 pC / N, 5.3±0.5 pC / N, 5.2±0.5 pC / N, 5.2±0.5 pC / N,和5.6 ±0.5 pC / N,分别。利用超声换能器研究了这些薄膜的脉冲回波响应，发现了它们的压电d33eff常数与响应幅度之间的相关性。
{"title":"The effect of metal doping on the piezoelectric response of AlN film ultrasonic transducers","authors":"Xiaomei Zeng , Heng Jiang , Rakhimbergan Rakhimov , Shavkat Yuldashev , Changwei Zou , Jun Zhang , Oleksandr Pohrebniak , Bing Yang , Sheng Liu , Vasiliy O. Pelenovich","doi":"10.1016/j.jeurceramsoc.2026.118169","DOIUrl":"10.1016/j.jeurceramsoc.2026.118169","url":null,"abstract":"<div><div>Piezoelectric AlN thick films doped with Cr, Cu, Nb, Sc, Ta, Ti, Y, Zn, and Zr were deposited on Si and stainless-steel substrates using reactive RF magnetron sputtering. Planar Al sputter target with asymmetrically embedded disk of doping metal was employed in this study. The concentration of doping metal in the deposited films was a function of the distance between the substrate and the inlaid disk. Analysis of the film structure showed that, with the exception of ScAlN and ZnAlN films, the columnar structure and piezoelectric response of doped films were gradually degraded with increasing metal concentration. The piezoelectric <em>d</em><sub><em>33</em></sub><sup><em>eff</em></sup> constants of ScAlN (6.7 at% of Sc), ZnAlN (1.6 at% of Zn), NbAlN (1.2 at% of Nb), TiAlN (0.7 at% of Ti), and AlN films are 10.1 ± 0.5 pC/N, 5.3 ± 0.5 pC/N, 5.2 ± 0.5 pC/N, 5.2 ± 0.5 pC/N, and 5.6 ± 0.5 pC/N, respectively. Pulse-echo response of these films was studied using ultrasonic transducers and correlation between their piezoelectric <em>d</em><sub><em>33</em></sub><sup><em>eff</em></sup> constant and amplitude of the response was found.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118169"},"PeriodicalIF":6.2,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079971","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 : 2026-01-24DOI: 10.1016/j.jeurceramsoc.2026.118167
Xinghua Su , Yangliu Tian , Chengguang Lou , Mengyao Wang , Qiang Tian , Hui Zeng , Xiao Deng , Bo Zhou , Jian Zhang
High-entropy ceramics are interesting candidates for immobilization of high-level radioactive waste. However, the link between radiation resistance and configuration entropy is seldom studied. In this work, the irradiation performances of high-entropy ceramics (Y1/8Sm1/8Eu1/8Gd1/8Dy1/8Ho1/8Er1/8Yb1/8)2Ti2O7 (8HETC), and (Y1/5Sm1/5Eu1/5Gd1/5Yb1/5)2Ti2O7 (5HETC), as well as Gd2Ti2O7 ceramic (TC) under 800 keV Kr2+ ion irradiation were studied. It was found that the resistance to radiation-induced amorphization was enhanced with the increase of configuration entropy. 8HETC with a high configuration entropy of 2.08 R demonstrated the high irradiation resistance compared to 5HETC and TC. The formation energies of cation antisite defects and anion Frenkel defects were decreased with the increase of the configuration entropy, which was suggested to account for the highest irradiation resistance of 8HETC. This study provides the insights into the relationship between configurational entropy and radiation resistance of high-entropy ceramics, which is helpful to design advanced nuclear engineering materials with excellent radiation resistance.
{"title":"Irradiation performance of high-entropy rare earth titanate ceramics","authors":"Xinghua Su , Yangliu Tian , Chengguang Lou , Mengyao Wang , Qiang Tian , Hui Zeng , Xiao Deng , Bo Zhou , Jian Zhang","doi":"10.1016/j.jeurceramsoc.2026.118167","DOIUrl":"10.1016/j.jeurceramsoc.2026.118167","url":null,"abstract":"<div><div>High-entropy ceramics are interesting candidates for immobilization of high-level radioactive waste. However, the link between radiation resistance and configuration entropy is seldom studied. In this work, the irradiation performances of high-entropy ceramics (Y<sub>1/8</sub>Sm<sub>1/8</sub>Eu<sub>1/8</sub>Gd<sub>1/8</sub>Dy<sub>1/8</sub>Ho<sub>1/8</sub>Er<sub>1/8</sub>Yb<sub>1/8</sub>)<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> (8HETC), and (Y<sub>1/5</sub>Sm<sub>1/5</sub>Eu<sub>1/5</sub>Gd<sub>1/5</sub>Yb<sub>1/5</sub>)<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> (5HETC), as well as Gd<sub>2</sub>Ti<sub>2</sub>O<sub>7</sub> ceramic (TC) under 800 keV Kr<sup>2+</sup> ion irradiation were studied. It was found that the resistance to radiation-induced amorphization was enhanced with the increase of configuration entropy. 8HETC with a high configuration entropy of 2.08 R demonstrated the high irradiation resistance compared to 5HETC and TC. The formation energies of cation antisite defects and anion Frenkel defects were decreased with the increase of the configuration entropy, which was suggested to account for the highest irradiation resistance of 8HETC. This study provides the insights into the relationship between configurational entropy and radiation resistance of high-entropy ceramics, which is helpful to design advanced nuclear engineering materials with excellent radiation resistance.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118167"},"PeriodicalIF":6.2,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080535","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 : 2026-01-24DOI: 10.1016/j.jeurceramsoc.2026.118168
Jihang Liu , Fan Zhang , Meiyue Li , Yiwen Niu , Zhiqiang Zhang , Xueqiong Lei , Zhan Jie Wang
Dielectric capacitors have drawn significant attention in pulsed power devices due to their high power density and fast charge-discharge speed. However, the insufficient energy storage density (Wrec) and efficiency (η) seriously constrain their practical applications. To address this limitation, the present work employed a collaborative optimization strategy to develop (Bi0.5Na0.5)0.94Ba0.06TiO3-based high-entropy ceramics (HECs), aiming to enhance the energy storage characteristics of lead-free ceramics. This strategy induces synergistic effects, including grain refinement, enhancing dielectric relaxation, suppressing interface polarization, expanding bandgap, and forming polar nanodomains. These modifications contribute to significantly improving the electrical breakdown strength (Eb) and η. Notably, superior Wrec ∼ 9.09 J/cm³ and η∼ 82.4 % at Eb of 696 kV/cm are attained in [((Bi0.5Na0.5)0.94Ba0.06)0.65(Sr0.5Ca0.5)0.35]0.94Nd0.06Ti0.95(Zr1/2Hf1/2)0.05O3 HEC, accompanied by excellent temperature stability, frequency stability and charge-discharge performance. The remarkable enhancement in energy storage properties validates that high-entropy synergistic strategy represents an effective approach for advancing lead-free energy storage ceramics.
{"title":"Achieving superior energy storage density in (Bi0.5Na0.5)0.94Ba0.06TiO3-based high-entropy ceramics through a collaborative optimization strategy","authors":"Jihang Liu , Fan Zhang , Meiyue Li , Yiwen Niu , Zhiqiang Zhang , Xueqiong Lei , Zhan Jie Wang","doi":"10.1016/j.jeurceramsoc.2026.118168","DOIUrl":"10.1016/j.jeurceramsoc.2026.118168","url":null,"abstract":"<div><div>Dielectric capacitors have drawn significant attention in pulsed power devices due to their high power density and fast charge-discharge speed. However, the insufficient energy storage density (<em>W</em><sub>rec</sub>) and efficiency (<em>η</em>) seriously constrain their practical applications. To address this limitation, the present work employed a collaborative optimization strategy to develop (Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.94</sub>Ba<sub>0.06</sub>TiO<sub>3</sub>-based high-entropy ceramics (HECs), aiming to enhance the energy storage characteristics of lead-free ceramics. This strategy induces synergistic effects, including grain refinement, enhancing dielectric relaxation, suppressing interface polarization, expanding bandgap, and forming polar nanodomains. These modifications contribute to significantly improving the electrical breakdown strength (<em>E</em><sub>b</sub>) and <em>η</em>. Notably, superior <em>W</em><sub>rec</sub> ∼ 9.09 J/cm³ and <em>η∼</em> 82.4 % at <em>E</em><sub>b</sub> of 696 kV/cm are attained in [((Bi<sub>0.5</sub>Na<sub>0.5</sub>)<sub>0.94</sub>Ba<sub>0.06</sub>)<sub>0.65</sub>(Sr<sub>0.5</sub>Ca<sub>0.5</sub>)<sub>0.35</sub>]<sub>0.94</sub>Nd<sub>0.06</sub>Ti<sub>0.95</sub>(Zr<sub>1/2</sub>Hf<sub>1/2</sub>)<sub>0.05</sub>O<sub>3</sub> HEC, accompanied by excellent temperature stability, frequency stability and charge-discharge performance. The remarkable enhancement in energy storage properties validates that high-entropy synergistic strategy represents an effective approach for advancing lead-free energy storage ceramics.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118168"},"PeriodicalIF":6.2,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080448","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 : 2026-01-24DOI: 10.1016/j.jeurceramsoc.2026.118170
Fanfei Xu , Qian Xiong , Li Ma , Chengjian Huang , Zhenyong Cen , Rui Huang , Sasipohn Prasertpalichat , Nengneng Luo
Owing to alternate (Bi2O2)2+ layers and perovskite blocks structures, BaBi4Ti4O15 ferroelectric ceramic exhibits high breakdown strengthen, making it promising in energy storage applications. However, the substantial hysteresis and remnant polarization under electric field impairs its energy storage performance. In this work, rare-earth ion La3+ was added into BaBi4Ti4O15 to form a new solid solution BaBi4-xLaxTi4O15 (BBLTx) to address the problem and simultaneously optimize the energy storage performance. Interestingly, the BBLTx ceramics demonstrated improved relaxor characteristic and reduced grain size, which significantly reduced the polarization hysteresis while increased the breakdown strength. Notably, the BBLT0.9 ceramic showcased high recoverable energy density of 6.7 J/cm3 and ultrahigh efficiency up to 93.5 %, under an applied electric field of 820 kV/cm. This work highlights the significant potential of BBT-based lead-free ceramics for advanced energy storage applications and provides novel insights into performance optimization strategies through functional modification.
{"title":"La3 + modified BaBi4Ti4O15 bismuth layer-structured ceramics toward high energy storage density and efficiency","authors":"Fanfei Xu , Qian Xiong , Li Ma , Chengjian Huang , Zhenyong Cen , Rui Huang , Sasipohn Prasertpalichat , Nengneng Luo","doi":"10.1016/j.jeurceramsoc.2026.118170","DOIUrl":"10.1016/j.jeurceramsoc.2026.118170","url":null,"abstract":"<div><div>Owing to alternate (Bi<sub>2</sub>O<sub>2</sub>)<sup>2+</sup> layers and perovskite blocks structures, BaBi<sub>4</sub>Ti<sub>4</sub>O<sub>15</sub> ferroelectric ceramic exhibits high breakdown strengthen, making it promising in energy storage applications. However, the substantial hysteresis and remnant polarization under electric field impairs its energy storage performance. In this work, rare-earth ion La<sup>3+</sup> was added into BaBi<sub>4</sub>Ti<sub>4</sub>O<sub>15</sub> to form a new solid solution BaBi<sub>4-<em>x</em></sub>La<sub><em>x</em></sub>Ti<sub>4</sub>O<sub>15</sub> (BBLT<em>x</em>) to address the problem and simultaneously optimize the energy storage performance. Interestingly, the BBLT<em>x</em> ceramics demonstrated improved relaxor characteristic and reduced grain size, which significantly reduced the polarization hysteresis while increased the breakdown strength. Notably, the BBLT0.9 ceramic showcased high recoverable energy density of 6.7 J/cm<sup>3</sup> and ultrahigh efficiency up to 93.5 %, under an applied electric field of 820 kV/cm. This work highlights the significant potential of BBT-based lead-free ceramics for advanced energy storage applications and provides novel insights into performance optimization strategies through functional modification.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118170"},"PeriodicalIF":6.2,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079969","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 : 2026-01-24DOI: 10.1016/j.jeurceramsoc.2026.118173
Daniel P. DeLellis , Yi Wang , Vivekanand Muralikrishnan , Joel B. Harley , Michael R. Tonks , Amanda R. Krause
Abnormal grain growth has been previously found to increase with the inclusion of large pores (∼60 µm in diameter) in 80 ppm calcium doped alumina. However, the two-dimensional analysis could not accurately describe the proximity of the abnormal grains and pores to establish a correlation. This study uses laboratory-based diffraction contrast tomography and x-ray computed tomography to spatially map the pores and abnormal grains in 3D. A preference towards the formation of abnormal grains near large pores is found when compared to all potential sites. This finding supports that the pores may be a nucleation site for complexion transitions that promote abnormal grain growth. The growth of the abnormal grains in a subsequent heat treatment at 1600°C for 16 hrs was also studied. The elongation along the principal axes is similar for both small and large grains, again supporting that abnormal grain growth was facilitated by a complexion transition.
{"title":"3D analysis of abnormal grain growth in calcia doped alumina in the presence of large pores","authors":"Daniel P. DeLellis , Yi Wang , Vivekanand Muralikrishnan , Joel B. Harley , Michael R. Tonks , Amanda R. Krause","doi":"10.1016/j.jeurceramsoc.2026.118173","DOIUrl":"10.1016/j.jeurceramsoc.2026.118173","url":null,"abstract":"<div><div>Abnormal grain growth has been previously found to increase with the inclusion of large pores (∼60 µm in diameter) in 80 ppm calcium doped alumina. However, the two-dimensional analysis could not accurately describe the proximity of the abnormal grains and pores to establish a correlation. This study uses laboratory-based diffraction contrast tomography and x-ray computed tomography to spatially map the pores and abnormal grains in 3D. A preference towards the formation of abnormal grains near large pores is found when compared to all potential sites. This finding supports that the pores may be a nucleation site for complexion transitions that promote abnormal grain growth. The growth of the abnormal grains in a subsequent heat treatment at 1600°C for 16 hrs was also studied. The elongation along the principal axes is similar for both small and large grains, again supporting that abnormal grain growth was facilitated by a complexion transition.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118173"},"PeriodicalIF":6.2,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146080442","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 : 2026-01-24DOI: 10.1016/j.jeurceramsoc.2026.118171
Wenyu Zhang , Xiaokai Liu , Benshuang Sun , Hetao Zhao , Nuo Cheng , Xina Liang , Wenhui Bi , Mingzhen Zhang , Yang Liu , Jilin He
This study investigates the synthesis and sintering of EuBCO superconducting targets using an optimized oxalic acid co-precipitation method. The research systematically evaluates precursor parameters, including pH, ion concentration, and reaction temperature, identifying pH as the most critical factor. Optimal synthesis conditions (pH 2, 0.10 mol/L, 60℃) resulted in a single-phase superconducting powder following calcination at 900℃. Transmission electron microscopy (TEM) analysis confirmed a polycrystalline structure with a homogeneous distribution of elements. Sintering studies revealed that temperature significantly influences densification, while holding time further enhances microstructural homogenization. The densification activation energy, calculated from the main sintering curve (MSC), was found to be 326 kJ/mol. Sintering at 930℃ for 600 min achieved optimal properties, including a shrinkage of 23.58 %, a density of 6.19 g/cm3, a room-temperature resistivity of 1.99 mΩ·cm, and a flexural strength of 62.41 MPa.
{"title":"Tailoring microstructure and properties of EuBCO superconductors: The role of precursor control and sintering kinetics","authors":"Wenyu Zhang , Xiaokai Liu , Benshuang Sun , Hetao Zhao , Nuo Cheng , Xina Liang , Wenhui Bi , Mingzhen Zhang , Yang Liu , Jilin He","doi":"10.1016/j.jeurceramsoc.2026.118171","DOIUrl":"10.1016/j.jeurceramsoc.2026.118171","url":null,"abstract":"<div><div>This study investigates the synthesis and sintering of EuBCO superconducting targets using an optimized oxalic acid co-precipitation method. The research systematically evaluates precursor parameters, including pH, ion concentration, and reaction temperature, identifying pH as the most critical factor. Optimal synthesis conditions (pH 2, 0.10 mol/L, 60℃) resulted in a single-phase superconducting powder following calcination at 900℃. Transmission electron microscopy (TEM) analysis confirmed a polycrystalline structure with a homogeneous distribution of elements. Sintering studies revealed that temperature significantly influences densification, while holding time further enhances microstructural homogenization. The densification activation energy, calculated from the main sintering curve (MSC), was found to be 326 kJ/mol. Sintering at 930℃ for 600 min achieved optimal properties, including a shrinkage of 23.58 %, a density of 6.19 g/cm<sup>3</sup>, a room-temperature resistivity of 1.99 mΩ·cm, and a flexural strength of 62.41 MPa.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118171"},"PeriodicalIF":6.2,"publicationDate":"2026-01-24","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146079968","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 : 2026-01-22DOI: 10.1016/j.jeurceramsoc.2026.118164
Jiaqi He , Shaoyi Li , Minghao Xue , Peng Ji , Jingkun Yu , Lei Yuan
To overcome the inherent limitations in the physical properties of pure BaZrO3 ceramics, a solid-state reaction was employed to fabricate Yb-doped BaZrO3 ceramics with Yb doping levels of 1, 3, 5, and 7 wt%. The phase composition, defect structure, grain refinement mechanisms, and the impact of Yb doping concentration on the physical properties of the obtained ceramics was systematically studied. XRD analysis confirms that Yb dissolved into the Zr site of BaZrO3. The secondary phase Yb2Zr2O7 precipitates at grain boundaries when the Yb dopant concentration exceeds 3 wt%. The average grain size decreases significantly from 6 μm to 0.44 μm with the increasing of Yb dopping amount. This grain refinement arises from the decreased mobility of grain boundaries during sintering, resulting from both the point defect (such as ) due to Yb doping and the pinning effect exerted by the secondary Yb2Zr2O7 phase. The compressive strength peaks at 198 MPa for 3 wt% Yb doping, while thermal conductivity progressively decreases to 3.061 W·m−1·K−1 with Yb increasing dopant concentration. The improvement in physical properties stems from the synergistic effect of grain size, porosity, and point defects.
{"title":"Origin of grain refinement and influence on physical properties in Yb-doped BaZrO3 ceramics","authors":"Jiaqi He , Shaoyi Li , Minghao Xue , Peng Ji , Jingkun Yu , Lei Yuan","doi":"10.1016/j.jeurceramsoc.2026.118164","DOIUrl":"10.1016/j.jeurceramsoc.2026.118164","url":null,"abstract":"<div><div>To overcome the inherent limitations in the physical properties of pure BaZrO<sub>3</sub> ceramics, a solid-state reaction was employed to fabricate Yb-doped BaZrO<sub>3</sub> ceramics with Yb doping levels of 1, 3, 5, and 7 wt%. The phase composition, defect structure, grain refinement mechanisms, and the impact of Yb doping concentration on the physical properties of the obtained ceramics was systematically studied. XRD analysis confirms that Yb dissolved into the Zr site of BaZrO<sub>3</sub>. The secondary phase Yb<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> precipitates at grain boundaries when the Yb dopant concentration exceeds 3 wt%. The average grain size decreases significantly from 6 μm to 0.44 μm with the increasing of Yb dopping amount. This grain refinement arises from the decreased mobility of grain boundaries during sintering, resulting from both the point defect (such as <span><math><msubsup><mrow><mtext>V</mtext></mrow><mrow><mtext>O</mtext></mrow><mrow><mtext>••</mtext></mrow></msubsup></math></span>) due to Yb doping and the pinning effect exerted by the secondary Yb<sub>2</sub>Zr<sub>2</sub>O<sub>7</sub> phase. The compressive strength peaks at 198 MPa for 3 wt% Yb doping, while thermal conductivity progressively decreases to 3.061 W·m<sup>−1</sup>·K<sup>−1</sup> with Yb increasing dopant concentration. The improvement in physical properties stems from the synergistic effect of grain size, porosity, and point defects.</div></div>","PeriodicalId":17408,"journal":{"name":"Journal of The European Ceramic Society","volume":"46 8","pages":"Article 118164"},"PeriodicalIF":6.2,"publicationDate":"2026-01-22","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"146036567","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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