A study of microstructure and properties of BaTiO <sub>3</sub> from solid‐state and hydrothermal synthesis on MLCCs performance

Abstract It has generally been believed that the performance of ultra‐thin multilayer ceramic capacitors (MLCCs) are mainly controlled by doping elements and the contribution of synthesis approaches of BaTiO 3 (BT) powders can be neglected. However, in this study, we demonstrate that the solid‐state powders exhibit a heterogeneous distribution of residual BaCO 3 (BC), TiO 2 , or Ti‐rich phases, whereas hydrothermal powders are characterized by a BC surface layer, which can be characterized by nanoinfrared (AFM‐IR), and the divergent approaches play an important role in the “core–shell” structure. The BC layer in hydrothermal BT contributes to Ti vacancies during sintering, increasing the “core–shell” ratio in MLCCs. This results in augmented capacitance but reduced performance at elevated temperatures. Conversely, the presence of a Ti‐rich phase in solid‐state powders induces Ba vacancies, leading to decreased “core–shell” ratios and dielectric constants.

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Publication Details

Journal
Journal of the American Ceramic Society
Published
2024-12-10
DOI
https://doi.org/10.1111/jace.20283
Citations
1
Primary Topic
Ferroelectric and Piezoelectric Materials
Type
article
Field-Weighted Citation Impact
0.12

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article

A study of microstructure and properties of BaTiO 3 from solid‐state and hydrothermal synthesis on MLCCs performance

Saiwei Luan, Xiuhua Cao, Lei Zhang, Zhenxiao Fu et al.
1 citations
Journal of the American Ceramic Society
Ferroelectric and Piezoelectric Materials
0.12
article

A study of microstructure and properties of BaTiO 3 from solid‐state and hydrothermal synthesis on MLCCs performance

Saiwei Luan, Xiuhua Cao, Lei Zhang, Zhenxiao Fu, Pengfei Wang, Jianwei Zhao, Shuhui Yu, Xinyu Fu, Jun Yang, Xiong Huang, Bo Li, Rong Sun
article en
1 citations

Abstract

Abstract It has generally been believed that the performance of ultra‐thin multilayer ceramic capacitors (MLCCs) are mainly controlled by doping elements and the contribution of synthesis approaches of BaTiO 3 (BT) powders can be neglected. However, in this study, we demonstrate that the solid‐state powders exhibit a heterogeneous distribution of residual BaCO 3 (BC), TiO 2 , or Ti‐rich phases, whereas hydrothermal powders are characterized by a BC surface layer, which can be characterized by nanoinfrared (AFM‐IR), and the divergent approaches play an important role in the “core–shell” structure. The BC layer in hydrothermal BT contributes to Ti vacancies during sintering, increasing the “core–shell” ratio in MLCCs. This results in augmented capacitance but reduced performance at elevated temperatures. Conversely, the presence of a Ti‐rich phase in solid‐state powders induces Ba vacancies, leading to decreased “core–shell” ratios and dielectric constants.

Journal of the American Ceramic SocietyVol. 108(4)
Chinese Academy of Sciences (CN), Tsinghua–Berkeley Shenzhen Institute (CN), Advanced Technology & Materials (China) (CN), Shenzhen Institutes of Advanced Technology (CN), PLA Army Engineering University (CN), Tsinghua University (CN)
National Natural Science Foundation of China, Natural Science Foundation of Guangdong Province, Natural Science Foundation of Jiangsu Province
Openalex Percentile: Top 57%
Ferroelectric and Piezoelectric Materials
0.12
DOISourceOpenAlex
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