Article
Nanoscience & Nanotechnology
Abhisikta Barman, Subhashree Chatterjee, Canlin Ou, Yau Yau Tse, Niladri Banerjee, Sohini Kar-Narayan, Anuja Datta, Devajyoti Mukherjee
Summary: A large electrocaloric effect is achieved through a strain-engineered Ba0.85Ca0.15Ti0.9Zr0.1O3 (BCZT) thin film heterostructure, demonstrating a broad second-order phase transition and unprecedented adiabatic temperature change of up to 13.5 K at 430 K in the BCZT/LSMO heterostructure. These effects have the potential to enhance relative cooling powers.
Article
Chemistry, Physical
Dae-Su Kim, Jae-Min Eum, Su-Hwan Go, Ho-Sung Shin, Hero Kim, Seok-June Chae, Sun-Woo Kim, Eun-Ji Kim, Jong-Un Woo, Sahn Nahm
Summary: Thick films of 0.96(K0.5Na0.5)(Nb1-ySby)O-3-0.04SrZrO(3) [KN(N1-ySy)-SZ] were textured using NaNbO3 templates, showing promising piezoelectric properties. A thick film with 3.0 mol% NaNbO3 seed exhibited high d(33) values and excellent thermal stability, making it a suitable candidate for piezoelectric energy harvesters.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Engineering, Electrical & Electronic
Huangtao Wu, Shaoyang Shi, Xiang Liu, Hua Wang, Jiwen Xu, Ling Yang, Wei Qiu, Shangju Zhou
Summary: By doping and improving sintering techniques, both the optical and electrical properties of (K0.5Na0.5)NbO3-Ba(Bi0.5Ta0.5)O-3 ferroelectric ceramics have been enhanced, making them excellent candidates for new transparent electronic devices.
JOURNAL OF MATERIALS SCIENCE-MATERIALS IN ELECTRONICS
(2022)
Article
Materials Science, Ceramics
Jingwei Zhao, Zhonghua Yao, Zhijian Wang, Ning Zhang, Hua Hao, Minghe Cao, Hanxing Liu
Summary: By employing microstructural engineering, an optimized lead-free Zr-modified BiMg0.5Zr0.04Tix-0.04O3 composition was developed to enhance energy storage behavior, achieving superior energy properties and high efficiency. Rapid annealing and excess Ti source doping effectively increased polarization and dielectric breakdown levels.
CERAMICS INTERNATIONAL
(2021)
Article
Physics, Condensed Matter
Komalika Rani, Sylvia Matzen, Stephane Gable, Thomas Maroutian, Guillaume Agnus, Philippe Lecoeur
Summary: In this study, the polarization-dependent photocurrent of epitaxial Pb(Zr, Ti)O-3 thin films has been carefully investigated, and a quantitative determination of the unswitchable part of ferroelectric polarization has been provided. This research approach can be used to optimize the switchability of photocurrent and provides important insights into the ferroelectric behavior of various types of ferroelectric layers in which pinned polarization is difficult to investigate.
JOURNAL OF PHYSICS-CONDENSED MATTER
(2022)
Article
Nanoscience & Nanotechnology
Chao Zhang, Zhanming Dou, Shizhi Zeng, Kanghua Li, Fangfang Zeng, Wenrong Xiao, Shiyong Qiu, Guifen Fan, Shenglin Jiang, Wei Luo, Qiuyun Fu, Guangzu Zhang
Summary: This study introduces low-radius Li+ into BaZr0.2Ti0.8O3 (BZT) through ion substitution engineering, leading to a change in internal lattice stress and a significant enhancement of the ferroelectric properties in BZT ceramics. Under the conditions of 333 K and 70 kV cm-1, the adiabatic temperature change of 5.7 mol% Li2CO3-doped BZT is 1.37 K, which is higher than that of pure BZT ceramics (0.61 K). Therefore, this work provides a simple but effective approach to design high-performance electrocaloric materials for next-generation refrigeration.
ACS APPLIED MATERIALS & INTERFACES
(2023)
Article
Materials Science, Ceramics
Zhe Wang, Jinyan Zhao, Gang Niu, Nan Zhang, Kun Zheng, Yi Quan, Lingyan Wang, Jian Zhuang, Genshui Wang, Xin Li, Henghui Cai, Ming Liu, Zhuangde Jiang, Yulong Zhao, Wei Ren
Summary: In this work, high-quality (0.94-x%)(Bi0.5Na0.5)TiO3-0.06BaTiO3-x%NaNbO3 thin films were successfully deposited on Pt/TiO2/SiO2/Si substrates by sol-gel method. The BNT-6BT-6NN thin films showed an optimized strain response, which is attributed to a synergistic reaction of active domain switching and reversible electric-field-induced phase transition.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Gang Liu, Wenzi Yu, Ying Wang, Haoren Feng, Minghui Hao, Guanghua Wu, Quan Li, Kun Yu, Baoyan Fan, Li Jin, Chunlin Song, Yan Yan
Summary: In this paper, Sr2+ and Hf4+ are doped into BaTiO3 to construct a multicritical point, improving the adiabatic temperature change and broadening the working temperature span. The (Ba0.9Sr0.1)(Hf0.1Ti0.9)O3 ceramic shows the most excellent comprehensive electrocaloric performance and has the potential as a lead-free bulk ceramic material for EC refrigeration applications.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Nguyen Chi Trung Ngo, Hironari Sugiyama, Buddhika Amila Kumara Sodige, Juan Paulo Wiff, Satoru Yamanaka, Yoonho Kim, Tsuneo Suzuki, Masaaki Baba, Masatoshi Takeda, Noboru Yamada, Koichi Niihara, Tadachika Nakayama
Summary: The energy-harvesting ability of the lead-free ferroelectric Ba(Zr,Ti)O-3 was investigated and greatly enhanced using the Kim novel electrothermodynamic cycle for low-temperature application. The synthesized Ba(Zr,Ti)O-3 material with a Zr:Ti ratio of 10:90 exhibited a mix relaxor-ferroelectric behavior. The highest energy density achieved in a practical test for this lead-free ferroelectric bulk material in the BaTiO3 family was 504 mJ/cm(3).
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Multidisciplinary
Rui Tang, Rui He, Sangmo Kim, Chung Wung Bark
Summary: By controlling the doping, the bandgap of ferroelectric complex oxide films can be effectively reduced, improving their absorption of visible light and increasing the photocurrent density. This simple doping technique can be applied in photovoltaic energy conversion or optoelectronic devices.
Article
Materials Science, Ceramics
Xupeng Yuan, Yangyang Zhang, Lijiao Gong, Baoqing Li, Ling Zhang
Summary: This paper investigates the effect of adding BNT on the performance of NaNbO3-based ferroelectric ceramics, and finds that the addition of BNT significantly improves the bulk density and breakdown field strength of the material. The two phases also exhibit good mutual solubility, resulting in high polarization intensity and excellent energy storage performance.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Physical
Changhong Yang, Chao Feng, Panpan Lv, Jin Qian, Yajie Han, Xiujuan Lin, Shifeng Huang, Xin Cheng, Zhenxiang Cheng
Summary: In this study, the coexistence of positive and negative electrocaloric effects was achieved in a lead-free ferroelectric film, resulting in a significant total temperature change. Oxygen vacancy-related defect dipoles played a critical role in the negative electrocaloric effect at lower temperatures, while phase transition was responsible for the positive effect at higher temperatures. The film demonstrated high electrocaloric strength and a large temperature change.
Article
Materials Science, Multidisciplinary
Rui Tang, Rui He, Sangmo Kim, Chung Wung Bark
Summary: Driven by the demand for renewable and clean energy, this study investigated the photovoltaic effect of various solar cells and materials. By modifying the BLT and Co-BLT composites with FeCo-BLT films, the bandgap was narrowed and visible light absorption was increased, resulting in improved photovoltaic power generation performance. The modified double-ferroelectric, thin-film composites showed superior optoelectronic properties and enhanced current density, indicating improved efficiency of ferroelectric thin-film photovoltaic reactions.
Article
Chemistry, Physical
Dafu Zeng, Qinpeng Dong, Peng Nong, Yue Pan, Ming Zhao Xu, Xiang Wang, Jiaming Wang, Xiuli Chen, Huanfu Zhou
Summary: New environmental protection energy storage devices have been widely studied, and BaTiO3-based ceramics are considered excellent materials for achieving high energy storage. In this study, a series of (1-x)BaTiO3-x(Bi0.5Li0.5)(Ti0.5Sn0.5)O3 ceramics were successfully synthesized, with 0.2BLST ceramics exhibiting high energy storage density and efficiency under certain conditions. These ceramics also displayed outstanding stability and excellent charge-discharge performance, making them a promising lead-free energy material.
JOURNAL OF ALLOYS AND COMPOUNDS
(2023)
Article
Chemistry, Inorganic & Nuclear
Shan Zhang, Ao Gong, Xinxiang Yang, Pei Han, Ningning Sun, Yong Li, Liwen Zhang, Xihong Hao
Summary: By optimizing the macroscopic polarization, ultrahigh photo-detection performances are achieved in hexagonal YbMnO3-based self-powered photodetectors, with high short-circuit current density and enhanced polarization being the key factors contributing to their excellent performance in photo-detection applications.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Chemistry, Multidisciplinary
Wei Peng, Jacob A. Zorn, Junsik Mun, Muhammad Sheeraz, Chang Jae Roh, Jun Pan, Bo Wang, Kun Guo, Chang Won Ahn, Yaping Zhang, Kui Yao, Jong Seok Lee, Jin-Seok Chung, Tae Heon Kim, Long-Qing Chen, Miyoung Kim, Lingfei Wang, Tae Won Noh
ADVANCED FUNCTIONAL MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Jin San Choi, Chang Won Ahn, Jong-Seong Bae, Tae Heon Kim
CURRENT APPLIED PHYSICS
(2020)
Article
Nanoscience & Nanotechnology
Sung Sik Won, Masami Kawahara, Chang Won Ahn, Joonhee Lee, Jinkee Lee, Chang Kyu Jeong, Angus Kingon, Seung-Hyun Kim
ADVANCED ELECTRONIC MATERIALS
(2020)
Article
Materials Science, Multidisciplinary
Bich Thuy Nguyen, Sung Sik Won, Bong Chan Park, Yong Jin Jo, Chang Won Ahn, Ill Won Kim, Tae Heon Kim
CURRENT APPLIED PHYSICS
(2020)
Article
Materials Science, Ceramics
Trang An Duong, Farrukh Erkinov, Mastura Aripova, Chang Won Ahn, Byeong Woo Kim, Hyoung-Su Han, Jae-Shin Lee
Summary: This study compared the phase transition behavior and electrical properties of Zr4+ single doping and Ba2+Zr4+ co-doping in KNN ceramics, optimizing piezoelectric performance in KNN-6BZ ceramics. Results showed that ferroelectric properties in KNN ceramics gradually transform with BaZrO3 modification, with enhanced strain properties and presence of fermelectric domains and polar nanoregions in KNN-100BZ ceramics.
CERAMICS INTERNATIONAL
(2021)
Article
Engineering, Electrical & Electronic
Hoang Thien Khoi Nguyen, Trang An Duong, Farrukh Erkinov, Chang Won Ahn, Byeong Woo Kim, Hyoung-Su Han, Jae-Shin Lee
JOURNAL OF ELECTRONIC MATERIALS
(2020)
Article
Chemistry, Multidisciplinary
Yonghun Lee, Kyung Won Kim, Nguyen Xuan Duong, Hyeok Park, Jinhong Park, Chang Won Ahn, In Woo Park, Seok Cheon Jang, Dong Hoe Kim, Minbaek Lee, Woo-Jae Chung, Tae Heon Kim, Hyungwoo Lee, Kwang Heo
Article
Physics, Applied
Md. Mehedi Hasan, Chang Won Ahn, Tae Heon Kim, Jin Jang
Summary: A ZnO TFT with a ferroelectric GI using solution processed AlOx/HZO was reported in this paper. The TFT exhibited good performance with a high field-effect mobility, on/off current ratio, and a sub-threshold swing. The results demonstrate the feasibility of fabricating ferroelectric HZO TFT using the solution process.
APPLIED PHYSICS LETTERS
(2021)
Article
Materials Science, Ceramics
Fazli Akram, Muhammad Sheeraz, Ali Hussain, Ill Won Kim, Tae Heon Kim, Chang Won Ahn
Summary: Lead-free zirconium-modified Bi-1/2(Na0.78K0.22)(1/2)TiO3 ceramics were synthesized in this study, showing the presence of different phases and studying the ferroelectric polarization response under temperature variations. The results demonstrate that the addition of Zr can enhance the energy-storage properties of the ceramics, extending the operating temperature range and benefiting the application of energy storage devices.
CERAMICS INTERNATIONAL
(2021)
Article
Chemistry, Physical
Minsoo P. Kim, Chang Won Ahn, Youngsu Lee, Kyoungho Kim, Jonghwa Park, Hyunhyub Ko
Summary: This study demonstrates that interfacial polarization in bilayer polymer films can significantly enhance dielectric constants, leading to improved triboelectric performance.
Article
Materials Science, Ceramics
Muhammad Sheeraz, Mamoon Ur Rashid, Asad Ali, Fazli Akram, Ho Jeong Lee, Jin San Choi, Jong-Seong Bae, Yong Soo Kim, Young -Han Shin, Chang Won Ahn, Tae Heon Kim
Summary: This study investigates the structural evolution of polymorphic phases in Al2O3-inserted SrMnO3 ceramics, identifying the presence of the 6H-hexagonal SrMnO3 phase and examining the chemical compositions and electronic structures of the compounds. First-principles calculations show no clear difference in total energies between the 4H- and 6H-hexagonal polymorphs, regardless of the presence of Sr and oxygen vacancies. Possible origins are discussed based on refined lattice parameters of the 6H SrMnO3 phase.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Chemistry, Physical
Jeong Woo Lee, Furqanul Hassan Naqvi, Jae-Hyeon Ko, Tae Heon Kim, Chang Won Ahn
Summary: In this study, inelastic light scattering spectra of organic-inorganic halide perovskite MAPbCl(3) single crystals were investigated using Brillouin spectroscopy. The results revealed the sound velocities, acoustic absorption coefficients, and temperature dependences of elastic constants of MAPbCl(3) in the cubic phase, providing important insights into its structural and mechanical properties.
Article
Materials Science, Multidisciplinary
Chang Won Ahn, Jae Hun Jo, Jin San Choi, Young Hun Hwang, Ill Won Kim, Tae Heon Kim
Summary: Anion-substituted lead-free double perovskite halides can be synthesized through mechanochemical synthesis. The bandgap of the heteroanionic compounds increases progressively with increasing chloride content, resulting in a blue shift from orange to yellow color.
ADVANCED ENGINEERING MATERIALS
(2022)
Article
Materials Science, Ceramics
Hoang Thien Khoi Nguyen, Trang An Duong, Chang Won Ahn, Byeong Woo Kim, Hyoung-Su Han, Jae-Shin Lee
Summary: This study investigated and compared the microstructures, crystal structures, phase transition behaviors, and electrical properties of BNT-ST-based ternary ceramics by modifying BiMeO3 (where Me = Al and Fe). It was found that the stabilized relaxor states are different between BiFeO3- and BiAlO3-modified BNT-ST ternary ceramics, suggesting that the phase transition (more precisely, the stabilization of ergodicity) can be influenced by the different internal strain in BNT-ST-based ternary ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Multidisciplinary Sciences
Nguyen Xuan Duong, Ji-Soo Jang, Min-Hyoung Jung, Jong-Seong Bae, Chang Won Ahn, Jong Sung Jin, Kyuwook Ihm, Gyehyeon Kim, So Yeon Lim, Jongmin Lee, Dang Duc Dung, Soonil Lee, Young -Min Kim, Sanghan Lee, Sang Mo Yang, Changhee Sohn, Ill Won Kim, Hu Young Jeong, Seung-Hyub Baek, Tae Heon Kim
Summary: Significant enhancements of low-frequency dielectric responses in oxygen-deficient oxide ceramics are demonstrated through specific treatments under humid environments. Ultrahigh dielectric permittivity is achieved by hydrogenation when Ni-substituted BaTiO3 ceramics are exposed to high humidity. Thermal annealing can restore the initial low polarizability state of the ceramics. The reversible control of dielectric relaxation characteristics in oxide ceramics allows for potential applications in highly efficient dielectric-based humidity sensors.
Article
Materials Science, Ceramics
Zilong Xiong, Wenzhuo Xue, Mujun Li, Feihu Tan, Yupeng Chen, Hongyu Yu
Summary: In this study, CBS glass/Al2O3 composites were developed for LTCC applications based on a CaO-B2O3-SiO2 (CBS) glass system with a high boron content. The study revealed that the softening of glass and interfacial reaction between the glass and Al2O3 were the two most important factors affecting LTCC's densification process. Real-time shrinkage rate of LTCC during sintering was successfully simulated, and it was proven that the formation of the CaAl2(BO3)O phase played a significant role in reducing glass viscosity and promoting dense structure formation. The resulting LTCC composite exhibited excellent performance for high-frequency applications.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Saurabh Kumar Sharma, Vinita Grover, Rakesh Shukla, Abid Hussain, Ambuj Mishra, Pawan Kumar Kulriya
Summary: In this study, the disordering caused by swift heavy ion irradiation in two different compositions of pyrochlore structures was investigated. X-ray diffraction, Raman spectroscopy, and high-resolution transmission electron microscopy were used to analyze the samples before and after irradiation. It was found that both compositions underwent amorphization due to irradiation, with a slower rate observed in Nd1.8Zr2.2O7.1. The irradiation-induced modified track region in Nd1.8Zr2.2O7.1 consisted of defect-rich pyrochlore structure, anion-deficient fluorite structure, and amorphous domains.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jiabei He, Mengshan Song, Ming Yang, Miaomiao Zhu
Summary: This study investigates the influence of ion irradiation on high-entropy ceramics and finds that irradiation-induced lattice rearrangement can improve the radiation resistance of these ceramics.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yajie Yu, Shi He, Zhengang Zhang, Haihua Chen, Peipeng Jin, Binnian Zhong, Linhui Zhang, Liping Wang, Cheng Lu
Summary: Silicide ceramics, including tantalum disilicide (TaSi2), are known for their exceptional physical properties but are limited in practical applications due to their inherent brittleness at room temperature. In this study, we successfully improved the mechanical properties of TaSi2 ceramics and increased their electrical conductivity by modifying the preparation methods and sintering conditions. These findings provide valuable insights for future applications of TaSi2 and the design of advanced ceramic materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Jian Li, Jia Liu, Yongcui Zhang, Wei Sun, Yang Wang, Haitao Wu, Ling Li, Chuanbing Cheng, Yingying Wang, Ke Tan, Futian Liu
Summary: Microstructure design plays a crucial role in regulating the microwave dielectric properties of materials, however, the understanding of frequency temperature stability and related micromechanism remains limited. In this study, a combination of first-principles calculations and experimental observation was used to investigate the correlation among sintering behavior, crystal structure, bonding nature, and microwave dielectric properties of LnPO(4) (Ln = Eu, Pr) ceramics. The research findings systematically clarify the optimized effect and micromechanism of lanthanides on the dielectric properties of monazite ceramics, providing insights into the design and enhancement of microwave dielectric materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Wenqian Pan, Xizhen Xia, Wei Zhou, Yang Li
Summary: The study investigates the frictional and wear behaviors of carbon fiber-reinforced SiC ceramic matrix composites with different fiber orientations mating with ceramic balls. The results show that fiber orientation significantly affects the friction and wear properties of the composites. Pads with randomly arranged fibers demonstrate better friction stability and lower wear volume, potentially suitable for bearing material applications. The research also explores the factors influencing the formation of continuous tribo-film and identifies abrasive wear and oxidation wear as the dominant wear mechanisms for the friction pairs.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Sergey Nikolaevich Perevislov, Ilya Evgenievich Arlashkin, Valentina Leonidovna Stolyarova
Summary: This paper describes the synthesis and sintering of MAX phases in the Zr-Al-C system. Different mixtures of initial Zr/Al/C and Zr/Al/ZrC powders were used to synthesize Zr2AlC and Zr3AlC2 MAX phases. The highest content of Zr3AlC2 MAX phase was obtained using a component ratio of 1:1.5:2-51.1 vol.% of Zr/Al/ZrC powders.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Weijia Luo, Xubin Wang, Baiheng Bai, Jianli Qiao, Xingcong Chen, Yongzheng Wen, Jingbo Sun, Lingxia Li, Ji Zhou
Summary: This study successfully establishes the relationship between internal strain and dielectric loss by synthesizing and designing specific structure of tungsten bronze ceramics, and concludes that controlling internal strain can effectively reduce dielectric loss. This research is of great significance for the development of future all-ceramic non-Hermitian devices.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Santanu Mondal, Juan Diego Shiraishi Lombard, Sreenivasulu Gollapudi, Carolina Tallon, Jie-Fang Li, Dwight Viehland
Summary: Ultrafast high-temperature sintering (UHS) is an effective method for rapidly densifying ZrB2 powders. The final grain size increases with longer sintering duration. X-ray diffraction and energy-dispersive spectroscopy show crystalline phase and compositional uniformity in ZrB2 after UHS.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
JiaNan Wang, ZhiQiang Li, YongZheng Zhu, Yao Liang, Yan Cui, HuaLong Tao, Bo Song, Alexander Nikiforov, ZhiHua Zhang
Summary: First-principles calculations were performed to investigate the crystal structure, electronic structure, and ion diffusion of sulfur-doped Li2FeSiO4. The results showed that sulfur doping can improve the electronic conductivity and reduce the energy barrier for ion diffusion.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Xiaodi Dai, Serdar Aydin, Mert Yuecel Yardimci, Gunter Reekmans, Peter Adriaensens, Geert De Schutter
Summary: This study investigates the rheological behavior, solidification process, and nanostructure changes of sodium hydroxide-activated slag (NH-AAS) and sodium silicate-activated slag (SS-AAS) pastes over time. The results show that NH-AAS and SS-AAS release similar heat and reach a similar reaction degree at their initial setting times, but have different gel structures.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yanliang Ji, Simon Becker, Zichen Lu, Alexander Mezhov, Regine von Klitzing, Schmidt Wolfram, Dietmar Stephan
Summary: This study reveals the significant influence of resting time on the rheological properties of cement suspensions, which is closely related to non-absorbed polycarboxylate superplasticizers (PCEs) size variation. Adsorbed PCE during resting tends to bridge particles instead of dispersing them, leading to an increased yield stress.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Yifeng Huang, Xin Wang, Yinchang Ma, Xiang Lv, Jiagang Wu
Summary: This study investigates the effect of K/Na ratio on the phase structure, ferroelectric domains, and piezoelectric properties of potassium sodium niobate (KNN)-based ceramics. It reveals that high Na+ content leads to large ferroelectric domains, while high K+ content results in local polarity heterogeneity and distinct dielectric relaxational behavior. The balanced local polarity and stress heterogeneities contribute to improved piezoelectricity.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Zun Xia, Yedong Rong, Hao Li, Ye Dong, Hongbo Yu, Jie Xu, Xiuhui Wang, Jinlong Yang
Summary: This study presents the synthesis of hollow MgAl2O4 particles in situ within porous ceramics, resulting in volume expansion and the formation of a hierarchical pore structure, leading to a significant improvement in compressive strength.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
Article
Materials Science, Ceramics
Honglong Wang, Zhiguo Sun, Faming Xia, Chenguang Yang, Xiaoguang Wang, Jintang Li, Linxu Jiang
Summary: In this study, the micro-geometry morphology variation and microstructural transformation mechanism of muscovite crystals under electron beam irradiation were explored. The results revealed the instability of the muscovite lattice under irradiation, as well as the expansion and shrinkage of the lattice with increasing dose. The study also identified changes in chemical structure and other mechanisms involved. These findings are significant for the design of radiation-resistant silicate materials and the manufacturing of electronic components used in the aerospace industry.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2024)
