Article
Materials Science, Ceramics
Gopal P. Khanal, Ichiro Fujii, Shintaro Ueno, Satoshi Wada
Summary: The mechanism of phase formation, dielectric, ferroelectric, and piezoelectric properties of BaTiO3 ceramics with oriented grains fabricated using BaCO3 matrix and HTO template particles were investigated. Sintering with samples' embedding prevented the formation of secondary phase, while the crystallographic orientation along a specific direction was developed by the epitaxial grain growth mechanism.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Atul Thakre, Deepam Maurya, Do Yoen Kim, Yunseok Kim, Panithan Sriboriboon, Il-Ryeol Yoo, Shashank Priya, Kyung-Hoon Cho, Hyun-Cheol Song, Jungho Ryu
Summary: Enhanced pyroelectric response was achieved in lead-free KBT-BT-NBT ceramics through domain engineering and texture along the [001] crystallographic direction. X-ray diffraction analysis indicated a high degree of texture (93%) along [001]. These textured ceramics exhibited comparable pyroelectric figures of merit to lead-based materials at room temperature, and a significant enhancement in pyroelectric response at depolarization temperature due to coherent domain switching.
JOURNAL OF THE EUROPEAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Yan Xiong, Junwei Li, Fansi Luo
Summary: The abnormal grain growth (AGG) behavior was observed during the solid-state sintering of nano-sized BaTiO3 powder. The results challenged traditional sintering theories and proposed an explanation based on the oriented attachment of smaller grains.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Tsang-Tse Fang
Summary: This paper discusses the formation of grain boundary barriers in the BaTiO3-based PTCR model and proposes new insights into the temperature and voltage dependences of resistance or resistivity under different conditions of the presence or absence of grain boundary phases.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Hao Zu, Qiuyun Fu, Guohua Cao, Hui Liu, Hui Huang, Liang Yan, Xiaojuan He, Chuanfeng Wang
Summary: Nanopowders of Bax-0.003La0.003TiO3 were synthesized using the sol-gel method. Abnormal grain growth was observed in the Ba-excessive composition at a low sintering temperature, contrary to previous reports. The presence of BaCO3 in the powder was confirmed to be responsible for the abnormal grain growth.
JOURNAL OF SOL-GEL SCIENCE AND TECHNOLOGY
(2023)
Article
Chemistry, Inorganic & Nuclear
Yunjing Shi, Xiaoyu Dong, Bo Shen, Jiwei Zhai
Summary: In this study, the piezoelectric properties of 0.7BFBT-T were enhanced through quenching. A suitable quenching temperature increased the content of the rhombohedral phase, leading to a highly distorted structure and magnification of the dipole moment, which was beneficial for enhancement of the polarity. Furthermore, quenching inhibited oxygen vacancies and increased the size and orderliness of domains, reducing the pinning effect.
INORGANIC CHEMISTRY FRONTIERS
(2022)
Article
Materials Science, Ceramics
Qing Wang, Manwen Yao, Weipeng Lin, Jian Lin
Summary: In this study, [001]-oriented Er-doped 0.67PMN-0.33PT textured ceramics with different BT template concentrations were investigated. The addition of Er3+ and the BT template improved the piezoelectric coefficient and strain of the ceramics. The enhancement may be attributed to the directional growth of grains along the template, the formation of local heterostructures, and the changes in the relaxation components caused by the solid solution of the BT templates and Er-doped matrix powder.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Tamal Kanti Ghosh, Sujan Kumar Chakrabarti, Shatabdi Ghosh, Samrat Saha, Sanjit Dey, Sudip Kumar Das
Summary: In this study, a new group of bioactive glass and glass ceramics containing nano-zirconia was synthesized. The addition of nano-zirconia improved the thermal stability and micro-hardness of the materials, and their bioactivity and non-toxicity were confirmed.
CERAMICS INTERNATIONAL
(2023)
Article
Materials Science, Ceramics
Chaoqiong Zhu, Ziming Cai, Limin Guo, Longtu Li, Xiaohui Wang
Summary: Ultra-thin multilayer ceramic capacitors with nanograined BaTiO3-based ceramics of various grain sizes were prepared using a chemical coating method. It was found that an optimal grain size around 70 nm could achieve maximum discharge energy density under the synergy effect of breakdown strength and polarization. This study provides important guidance for the design of ultra-thin layer MLCCs by optimizing dielectric properties and energy storage performance.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Ceramics
Min-Seon Lee, Young Hun Jeong
Summary: This study evaluated the phase transition behavior and electrical properties of (1-x)(Bi0.97Sm0.03)ScO3-xPbTiO3 ceramics templated by BaTiO3, and found that the piezoelectric properties can be improved by modifying the composition.
CERAMICS INTERNATIONAL
(2023)
Article
Physics, Applied
Aleksandar Stajcic, Ivana Stajcic, Vojislav V. Mitic, Chun-An Lu, Branislav Vlahovic, Dana Vasiljevic-Radovic
Summary: This research investigates the effect of N-2 and air atmospheres on the morphological and dielectric properties of modified BTO nanoparticles. It was found that the modified BTO had high dielectric constants in both atmospheres. Morphological analysis showed a connection between particle size, pore size distribution, and porosity. Image analysis data indicated that yttrium-based organometallic salt reduced oxygen vacancy generation in the N-2 atmosphere. DC bias sensitivity measurements showed that samples with higher dielectric constants were more sensitive to voltage change.
MODERN PHYSICS LETTERS B
(2022)
Article
Materials Science, Ceramics
Li-Qian Cheng, Zhenhua Ma, Jingtong Lu, Guozheng Jiang, Kai Chen
Summary: This study investigates the influence of grain orientation on the electrical properties and electrocaloric response in ferroelectric ceramics. It demonstrates that grain orientation significantly affects the dielectric properties and electrocaloric performance of the ceramics, providing a promising approach for improving electrocaloric response in ferroelectric materials.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2023)
Article
Materials Science, Ceramics
Yongqi Pan, Longfei Huang, Jie Feng, Xinyu Yu, Zunping Xu, Yi Chen
Summary: A study was conducted on the grain growth behavior of (K, Na)NbO3-based ceramics, revealing three stages of grain growth with increasing sintering temperature. The effect of this behavior on piezoelectric properties was also investigated.
CERAMICS INTERNATIONAL
(2022)
Article
Materials Science, Ceramics
Vladimir Prajzler, Karel Maca, Premysl St'astny, Richard Todd
Summary: The study found that in flash sintered 3YSZ ceramics, the microstructural homogeneity decreased with increasing direct current density and dwell time in a flash state, eventually leading to abnormal grain growth.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2022)
Article
Materials Science, Multidisciplinary
Haoyang Leng, Yongke Yan, Xiaotian Li, Sumanta Kumar Karan, Mark Fanton, Shashank Priya
Summary: It is found that 001 textured ceramics have higher d(33) values compared to random and 111 textured ceramics, while 111 textured ceramics exhibit higher Q(m) values due to less polarization rotation. MnO2 doping can further improve the Q(m) values for both 001 and 111 textured ceramics. These results highlight the potential of textured piezoelectric ceramics for high-power applications.
JOURNAL OF MATERIALS CHEMISTRY C
(2023)