Co Dang Nguyen, Duong Xuan Nguyen, Hung Duy Tran, Thanh Van Hoang, Thang Van Pham, Quan Duc Ngo, Tiep Huy Nguyen, Viet Quoc Dong, Ha Tran Nguyen, Lam Dinh Nguyen, Long The Phan, Dung Duc Dang, Tu Dinh Bui, Thang Duc Pham
{"title":"Influence of calcination temperature on characteristics properties of Bi1/2(Na0.8K0.2)1/2TiO3 prepared by sol-gel method","authors":"Co Dang Nguyen, Duong Xuan Nguyen, Hung Duy Tran, Thanh Van Hoang, Thang Van Pham, Quan Duc Ngo, Tiep Huy Nguyen, Viet Quoc Dong, Ha Tran Nguyen, Lam Dinh Nguyen, Long The Phan, Dung Duc Dang, Tu Dinh Bui, Thang Duc Pham","doi":"10.1007/s10832-025-00422-z","DOIUrl":"10.1007/s10832-025-00422-z","url":null,"abstract":"<div><p>This study demonstrated a synthesis of high-crystallinity Bi<sub>1/2</sub>(Na<sub>0.8</sub>K<sub>0.2</sub>)<sub>1/2</sub>TiO<sub>3</sub> (BNKT) powders using a sol-gel method through optimizing calcination conditions. Thermogravimetric analysis was utilized to monitor the decomposition and phase evolution of BNKT powders in the calcination temperature (<i>T</i><sub>cal</sub>) range of 600–800 °C. The BNKT powder with a single perovskite crystal phase was obtained by calcining xerogel for 1 h at <i>T</i><sub>cal</sub> = 800 °C. This result was also confirmed by X-ray diffraction and Raman scattering analyses and further explained through the main chemical reaction equations given at each calcination stage of the sol-gel process. In addition, the modification of associated physical properties (microstructure, magnetic, and optical properties) in BNKT powders was also investigated following the structural phase evolution induced by the calcination condition. Furthermore, a single-phase BNKT powder at <i>T</i><sub>cal</sub> = 800 °C was optimal for fabricating bulk ceramics. By sintering the pellets of an optimized powder at 1100 °C for 2 h, the obtained BNKT bulk ceramics showed a dense microstructure with an average grain size of about 1.75 μm. Interestingly, the BNKT bulk ceramics exhibited a high dielectric constant (<i>ε</i><sub>r</sub>) of 2193.4 with a dielectric loss tangent (tan<i>δ</i>) of 0.334 at 1 kHz, room temperature (RT). These findings indicate that optimizing the calcination temperature during the sol–gel process leads to fundamental improvements in the dielectric behavior of bulk BNKT ceramics, providing a promising basis for future studies aimed at enhancing their performance in potential dielectric capacitor applications.</p><h3>Graphical abstract</h3><div><figure><div><div><picture><source><img></source></picture></div></div></figure></div></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 1","pages":"32 - 47"},"PeriodicalIF":2.7,"publicationDate":"2025-07-12","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909433","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ramachandran Balakrishnan, Sudarshan Narayanan, Mangamma Geramilla, Mamidanna S. Ramachandra Rao
{"title":"Structural, dielectric, and ferroelectric characteristics of the low-temperature sintered 65PMN-35PT sample for electroceramic applications","authors":"Ramachandran Balakrishnan, Sudarshan Narayanan, Mangamma Geramilla, Mamidanna S. Ramachandra Rao","doi":"10.1007/s10832-025-00423-y","DOIUrl":"10.1007/s10832-025-00423-y","url":null,"abstract":"<div><p>A single-phase 0.65PbMg<sub>1/3</sub>Nb<sub>2/3</sub>O<sub>3</sub>-0.35PbTiO<sub>3</sub> (65PMN-35PT) ceramic was synthesized at a relatively low temperature (875 <sup>o</sup>C) using a modified columbite method. X-ray diffraction analysis confirmed the single-phase formation of perovskite 65PMN-35PT with a tetragonal structure. Morphological studies indicated that the sample consisted of small grains with a size of ≤ 2 <i>µ</i>m. The dielectric properties of the material demonstrate its relaxor behavior near the ferroelectric transition temperature, <i>T</i><sub>C</sub> = 457 K. The saturation and remnant polarization values of approximately 25.9 and 20.1 <i>µ</i>C cm<sup>−2</sup> were achieved for an electrically poled sample. Additionally, the poling induced a negative internal electric field of about − 0.2 kV cm<sup>−1</sup> was detected due to the presence of ferroelectric nano-grains in this bulk 65PMN-35PT sample. These observed characteristics of the pyrochlore-free 65PMN-35PT ceramic are similar to those of its single-crystal counterpart.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"54 1","pages":"20 - 31"},"PeriodicalIF":2.7,"publicationDate":"2025-07-08","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148909482","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Ning Wang, Long Zhao, Xiaolan Shi, Cuicui Liu, Jing Wang, Xidong Hao, Yuehui Wang
{"title":"YSZ-based mixed potential type NO sensor with iron oxide sensing electrode for breath diagnosis","authors":"Ning Wang, Long Zhao, Xiaolan Shi, Cuicui Liu, Jing Wang, Xidong Hao, Yuehui Wang","doi":"10.1007/s10832-025-00416-x","DOIUrl":"10.1007/s10832-025-00416-x","url":null,"abstract":"<div><p>For noninvasive asthma diagnosis by breath analysis, iron oxides (Fe<sub>2</sub>O<sub>3</sub>) were designed as sensitive electrodes to fabricate an yttria-stabilized zirconia (YSZ)-based nitric oxide (NO) sensor. The sensitivity of the sensors was improved by varying the content of NH<sub>4</sub>F to regulate the morphology. When the content of NH<sub>4</sub>F is 6 mmol, the sensitive Fe<sub>2</sub>O<sub>3</sub> electrode presents a spherical nanoscale microstructure with better porosity and dispersibility. Consequently, the sensor with such an electrode delivers a superior response of -10 mV to 10 ppm NO. The polarization curve also demonstrates that the sensitive electrode material has the highest electrochemical catalytic ability for NO. Meanwhile, the NO sensor has a wide detection range of 1–100 ppm, with a sensitivity of -15 mV/decade for 1–100 ppm NO. The low detection limit of the fabricated NO sensor could reach 1 ppm, and the response is -1.5 mV. In addition, the response and recovery times for 1−100 ppm NO were less than 35 s, indicating excellent response and recovery properties. The response to other interfering gases did not exceed that to NO, indicating good selectivity for NO. The device also has acceptable humidity resistance and excellent long-term stability during continuous measurements over 25 days. These findings indicate that the developed sensor has good prospects for breath analysis in fast and real-time noninvasive asthma diagnosis.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 4","pages":"405 - 416"},"PeriodicalIF":2.6,"publicationDate":"2025-06-28","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061024","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"A review on magnetorheological elastomers and piezoelectric materials to control vibration and harvest electrical energy","authors":"G. Arunkumar, Deepa Akepati, Yogesh Kumar Singla","doi":"10.1007/s10832-025-00419-8","DOIUrl":"10.1007/s10832-025-00419-8","url":null,"abstract":"<div><p>Magnetorheological elastomers (MREs) have garnered significant interest in recent decades due to their vast potential in engineering applications. Magnetorheological (MR) materials can be rapidly and reversibly tuned by applying a magnetic field, leveraging their viscoelastic and mechanical properties. Unlike MR fluids, which are prone to issues like oil contamination and particle sedimentation, MREs offer a solid alternative that mitigates these drawbacks. This solid-state advantage opens up numerous possibilities for creating intelligent devices across various technical domains, including vibration isolation, vibration reduction, and shock absorption. Because of these benefits, recent studies have investigated the incorporation of MREs into energy harvesting systems like piezoelectric materials. Piezoelectric materials are one of the promising technologies in the field of energy harvesting, which can utilize an external source (Vibration) as an input and harvest electrical energy as an output. This might fulfil the growing demands in the field of sustainable and renewable energy. This review paper provides a comprehensive overview of innovative materials and their types, particularly MREs and piezoelectric elastomers/polymers. It also discusses various manufacturing methods for MREs and piezoelectric materials, shedding light on their potential applications in the realm of energy harvesting and beyond.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 4","pages":"577 - 601"},"PeriodicalIF":2.6,"publicationDate":"2025-06-25","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147899438","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Internal steam generation via mixed ion-conducting fuel cell for methane reforming at 600 oC","authors":"Ok Sung Jeon, Myung Sik Choi","doi":"10.1007/s10832-025-00420-1","DOIUrl":"10.1007/s10832-025-00420-1","url":null,"abstract":"<div><p>Fuel cells provide efficient and eco-friendly alternatives to traditional combustion-based power generation. Among various types, protonic ceramic fuel cell (PCFC) has emerged as promising candidates due to their ability to operate at lower temperature and feasibility for methane usage. Although solid oxide fuel cell (SOFC) naturally generates steam at the anode during operation, PCFC necessitates the installation of an external steam generator to for mitigating carbon coke formation and incomplete conversion. This study introduces a novel mixed ion-conducting fuel cell (MIFC) design for internal steam generating in the anode side of PCFC. The MIFC was fabricated with BaZr<sub>0.1</sub>Ce<sub>0.7</sub>Y<sub>0.1</sub>Yb<sub>0.1</sub>O<sub>3-δ</sub> (BZCYYb) as a proton conductor and Sm<sub>0.2</sub>Ce<sub>0.8</sub>O<sub>2-δ</sub> (SDC) as an oxide ion conductor via dip-coating leveraging the shrinkage difference and coating slurry viscosities. The layered structure of the MIFC significantly improved maximum power densities of 0.40 W cm<sup>-2</sup> for hydrogen and 0.20 W cm<sup>-2</sup> for methane at 600 <sup>o</sup>C. The layered MIFC also achieved highly table performance at long-term methane reforming at 0.1 A cm<sup>-2</sup> for 50 h. Internal steam generation from the layered structure contributed to higher power densities and mitigated coke formation. The results highlight its potential for applications using hydrocarbon fuels.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 4","pages":"567 - 576"},"PeriodicalIF":2.6,"publicationDate":"2025-06-20","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148061141","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Sea-Fue Wang, Derrick Shieh, Yen Ju Chen, Yi-Le Liao, Yung-Fu Hsu
{"title":"Effects of Si4+ and Co3+ co-doping on the structural and electrical conductivity of Li1.3Al0.3Ti1.7(PO4)3 ceramic electrolytes","authors":"Sea-Fue Wang, Derrick Shieh, Yen Ju Chen, Yi-Le Liao, Yung-Fu Hsu","doi":"10.1007/s10832-025-00418-9","DOIUrl":"10.1007/s10832-025-00418-9","url":null,"abstract":"<div><p>In this study, we investigated the co-doping of Si<sup>4+</sup> and Co<sup>3+</sup> ions at the P<sup>5+</sup> and Al<sup>3+</sup> sites of the Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> electrolyte to enhance Li-ion conductivities. Si<sup>4+</sup> doping increased the maximum relative density of the sintered Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> electrolyte, although it slightly raised the densification temperature. The Li<sub>1.35</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>P<sub>2.95</sub>Si<sub>0.05</sub>O<sub>12</sub> electrolyte achieved 96.1% theoretical density at 925 °C. Subsequent doping with Co<sup>3+</sup> ions further improved densification, with the Li<sub>1.35</sub>Al<sub>0.29</sub>Co<sub>0.01</sub>Ti<sub>1.7</sub>P<sub>2.95</sub>Si<sub>0.05</sub>O<sub>12</sub> electrolyte reaching a peak relative density of 97.5% at 850 °C. However, higher levels of Si<sup>4+</sup> or Co<sup>3+</sup> ions significantly degraded densification. X-ray diffraction results of the Li<sub>1.3+<i>x</i></sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>P<sub>3−x</sub>Si<sub>x</sub>O<sub>12</sub> and Li<sub>1.35</sub>Al<sub>0.3−<i>y</i></sub>Co<sub><i>y</i></sub>Ti<sub>1.7</sub>P<sub>2.95</sub>Si<sub>0.05</sub>O<sub>12</sub> electrolytes identified a LiTi<sub>2</sub>(PO<sub>4</sub>)<sub>3</sub> phase with rhombohedral NASICON-type structure belonging to the <i>R</i><span>(:overline{3})</span><i>c</i> space group, along with a small quantity of the LiTiOPO<sub>4</sub> phase. Substitution of Si<sup>4+</sup> ions into the Li<sub>1.3</sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>(PO<sub>4</sub>)<sub>3</sub> lattice increased Li<sup>+</sup> ion transport channels due to the expansion of the cell volume. Raman spectroscopy and scanning electron microscopy revealed that the addition of both dopants improved the microstructure by enhancing the lattice structural order and leading to a higher degree of uniformity and smaller grains and higher crystallinity. X-ray photoelectron spectroscopy demonstrated that the incorporation of Si<sup>4+</sup> and Co<sup>3+</sup> ions into LATP lattice inhibited the reduction of Ti<sup>4+</sup> ions to Ti<sup>3+</sup> ions. The ionic conductivities of Li<sub>1.3+<i>x</i></sub>Al<sub>0.3</sub>Ti<sub>1.7</sub>P<sub>3−<i>x</i></sub>Si<sub><i>x</i></sub>O<sub>12</sub> electrolytes increased with higher Si<sup>4+</sup>-ion concentrations, reaching of 5.1 × 10<sup>− 4</sup> S/cm at 25 °C. In the case of co-doping of Si<sup>4+</sup> and Co<sup>3+</sup> ions, Li<sub>1.35</sub>Al<sub>0.29</sub>Co<sub>0.01</sub>Ti<sub>1.7</sub>P<sub>2.95</sub>Si<sub>0.05</sub>O<sub>12</sub> composition exhibited the highest ionic conductivity of 1.0 × 10<sup>− 3</sup> S/cm at 25 °C. The enhanced electrical conductivities were closely associated with high relative densities, excellent grain size uniformity, improved grain connectivity, and suppression of lower Ti<sup>4+</sup> ion reduction.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 4","pages":"554 - 566"},"PeriodicalIF":2.6,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060683","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Denis Zorin, Ekaterina Glazunova, Inna Andryushina, Lidiya Shilkina, Alexander Nazarenko, Konstantin Andryushin, Ilya Verbenko, Larisa Reznichenko
{"title":"Effects of mechanical activation on the formation process of ferroelectric piezoelectric ceramics","authors":"Denis Zorin, Ekaterina Glazunova, Inna Andryushina, Lidiya Shilkina, Alexander Nazarenko, Konstantin Andryushin, Ilya Verbenko, Larisa Reznichenko","doi":"10.1007/s10832-025-00417-w","DOIUrl":"10.1007/s10832-025-00417-w","url":null,"abstract":"<div><p>The regularities of the influence of mechanical activation procedures on the processes of phase formation, formation of crystalline and grain structures, and electrophysical properties of ferro-piezoelectric material based on a three-component system of solid solutions (1-x) Pb(Ti<sub>0.47</sub>Zr<sub>0.53</sub>)O<sub>3</sub>-xPb(Nb<sub>2/3</sub>Zn<sub>1/3</sub>)O<sub>3</sub> doped 1.5 mas. % Mn<sub>2</sub>O<sub>3</sub> with <i>x</i> = 0.15 have been established. The durations of mechanical activation that give a high density of ceramic, its best dielectric, piezoelectric and ferroelastic parameters have been determined. It has been shown that the dependence of these parameters on the duration of mechanical activation confirms the known correlation relationship \"elemental composition—internal structure (crystalline, grain, domain…) – macro-responses\" realized in materials with special electrical properties (ferroelectrics). It should be noted that the extreme values of all the presented characteristics are realized under such technological regulations that ensure the extreme nature of the parameters of the internal structure of objects. In this respect, the best piezoelectric characteristics and mechanical quality are possessed by the studied ceramics mechanically activated for (10–15) minutes. A conclusion is drawn on the expediency of using the obtained data in the development of similar materials and devices based on them.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 4","pages":"546 - 553"},"PeriodicalIF":2.6,"publicationDate":"2025-06-10","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060684","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Bhumika Sharma, Anand Somvanshi, Mehroosh Fatema, Naseem Ahmad, Prashant, Aref A. A. Qahtan, Mandeep Kaur, Kaushal Kumar
{"title":"Comprehensive analysis of structural, optical, morphological, and magnetic properties of Mn, Fe-Doped BaTiO3 nanoparticles","authors":"Bhumika Sharma, Anand Somvanshi, Mehroosh Fatema, Naseem Ahmad, Prashant, Aref A. A. Qahtan, Mandeep Kaur, Kaushal Kumar","doi":"10.1007/s10832-025-00406-z","DOIUrl":"10.1007/s10832-025-00406-z","url":null,"abstract":"<div><p>Mn- and Fe-doped BaTiO<sub>3</sub> samples were synthesized via the solid-state reaction route at ambient temperature. The structural analysis, performed using X-ray diffraction (XRD) and Rietveld refinement, confirmed a single-phase structure for the Fe-doped sample, while the Mn-doped sample exhibited a secondary TiO<sub>2</sub> impurity phase. The impact of doping was evident in the variations of Ba–O and Ti–O bond lengths, as revealed by Rietveld refinement and Fourier-transform infrared (FTIR) spectroscopy. Optical studies demonstrated a significant reduction in bandgap energy from 3.18 eV to 1.92 eV, highlighting the potential for tuning the material’s optical and electronic properties. Surface morphology and elemental composition were characterized using scanning electron microscopy (SEM) and energy-dispersive spectroscopy (EDS). Notably, Fe doping led to a considerable enhancement in magnetization, increasing from 0.078 emu/g to 0.107 emu/g, indicating its potential for magnetic applications.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 4","pages":"536 - 545"},"PeriodicalIF":2.6,"publicationDate":"2025-06-09","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060913","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
Chunli Yang, Lei Wang, Jun Li, Wei Yao, Yanru Liang, Kai Wang, Sining Yun
{"title":"Effect of Pr and In doping on hydrogen permeability properties of Y-BaZrO3","authors":"Chunli Yang, Lei Wang, Jun Li, Wei Yao, Yanru Liang, Kai Wang, Sining Yun","doi":"10.1007/s10832-025-00412-1","DOIUrl":"10.1007/s10832-025-00412-1","url":null,"abstract":"<div><p>Y-doped BaZrO<sub>3</sub> has emerged as a promising ceramic material for hydrogen separation membranes. The conductivity of Y-BaZrO<sub>3</sub> (BZY) ceramics is highly dependent on the concentration of oxygen vacancies. In this work, BZY further individually doped with In and Pr were prepared by the citrate sol–gel combustion method. Effects of doping on the ceramic phase structure, oxygen vacancies, and micromorphology were investigated using a range of analytical techniques, including XRD, Raman spectroscopy, XPS, and SEM. The conductivity, hydrogen permeability, and stability of BaZr<sub>0.7</sub>Y<sub>0.2</sub>In<sub>0.1</sub>O<sub>3−δ</sub> (BZYI) and BaZr<sub>0.7</sub>Y<sub>0.2</sub>Pr<sub>0.1</sub>O<sub>3−δ</sub> (BZYP) ceramics were systematically evaluated. Upon doping, BZYI exhibits the most favorable conductivity, reaching 9.98 × 10<sup>−3</sup> S·cm<sup>−1</sup> in dry air at 800 °C. At 900 °C, with water vapor introduced on the sweep side, the hydrogen permeation fluxes of BZYI and BZYP are 3.50 × 10<sup>−9</sup> mol·cm<sup>−2</sup>·s<sup>−1</sup> and 2.60 × 10<sup>−9</sup> mol·cm<sup>−2</sup>·s<sup>−1</sup>, respectively. Both samples were exposed to boiling water and a 100% CO<sub>2</sub> atmosphere at 900 °C for 3 h. Post-treatment XRD, Raman, and SEM analyses reveal no formation of heterophase, indicating excellent phase and microstructural stability.</p></div>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 4","pages":"520 - 535"},"PeriodicalIF":2.6,"publicationDate":"2025-06-05","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"147893722","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}
{"title":"Phase-field simulations of the performance and dielectric breakdown of multilayer ceramic capacitors","authors":"Yu Huang, Si Liu, Bingbing Li, Jinhua Lao, Suilong Huang, Xiucai Wang, Wenbo Zhu, Peng Xiao, Xinmei Yu, Jianwen Chen","doi":"10.1007/s10832-025-00411-2","DOIUrl":"10.1007/s10832-025-00411-2","url":null,"abstract":"<p>With miniaturization and thin-film development of multilayer ceramic capacitors (MLCCs), their operating field strength approaches the critical breakdown field strength. Due to the non-homogeneous structure inside the capacitor, the localized electric field concentration can induce local breakdown and insulation failure, which has become a bottleneck in improving its energy storage performance and reliability. In this paper, a mesoscopic to-macroscopic scale phase-field modeling of dielectric breakdown is constructed, and simulations are carried out to investigate the influence of non-homogeneous factors; such as ceramic grain size, crystallinity, and electrode spacing; on their local electric field distributions, breakdown behaviors, and energy storage densities. It was found that high crystallinity enhances polarizability, but also exacerbates inhomogeneity, thereby leading to local breakdown and reducing energy storage density. Moderate heat treatment increases grain size, reduces grain boundary defects, and enhances breakdown field strength and energy storage density. However, excessive grain growth introduces new defects, resulting in the opposite effect. As MLCCs develop in the direction of thin films, the electrode spacing is also reduced; Although this reduces the breakdown field strength, it can enhance the energy storage density by utilizing the multilayer structure. In this paper, the dielectric field breakdown model is combined with phase transition microstructure simulation to reveal the influence of microstructure on energy storage performance, which provides theoretical support and technical path for MLCC performance optimization.</p>","PeriodicalId":625,"journal":{"name":"Journal of Electroceramics","volume":"53 4","pages":"507 - 519"},"PeriodicalIF":2.6,"publicationDate":"2025-05-26","publicationTypes":"Journal Article","fieldsOfStudy":null,"isOpenAccess":false,"openAccessPdf":"","citationCount":null,"resultStr":null,"platform":"Semanticscholar","paperid":"148060611","PeriodicalName":null,"FirstCategoryId":null,"ListUrlMain":null,"RegionNum":4,"RegionCategory":"材料科学","ArticlePicture":[],"TitleCN":null,"AbstractTextCN":null,"PMCID":"","EPubDate":null,"PubModel":null,"JCR":null,"JCRName":null,"Score":null,"Total":0}