Enhanced electrical properties and Vickers hardness of calcium bismuth niobate ceramics by W/Co substituted at B-site
| Title: | Enhanced electrical properties and Vickers hardness of calcium bismuth niobate ceramics by W/Co substituted at B-site |
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| Authors: | Fei Wang, Jia Yang, Qing Yang, Ning Chen, Xinji Yang, Mingyue Mo, Jie Xing, Zhi Tan, Zhongqing Tian, Fancheng Meng, Yuheng Guo, Huixing Lin, Jianguo Zhu |
| Source: | Journal of Advanced Dielectrics, Vol 14, Iss 04 (2024) |
| Publisher Information: | World Scientific Publishing, 2024. |
| Publication Year: | 2024 |
| Subject Terms: | Calcium bismuth niobate ceramics, donor and acceptor ions, B-site, electrical properties, Vickers hardness, Electricity, QC501-721 |
| More Details: | Calcium bismuth niobate (CBN) ceramic, as a core element of high-temperature piezoelectric sensors, has attracted widespread attention due to its high Curie temperature within the class of Aurivillius compounds. However, CBN usually faces two shortcomings: poor piezoelectric constant and low resistivity. In this work, CBN-based ceramics with donor–acceptor ions (W/Co) co-substituted at B-site were prepared by solid-state reaction method, and structure–property relationship of ceramics was studied in detail. Co-substitution of W/Co ions effectively improved the electrical property and hardness of CBN ceramics. CaBi2Nb[Formula: see text](W[Formula: see text]Co[Formula: see text]O9 exhibits enhanced electrical and mechanical properties including high resistivity of [Formula: see text]cm at 500°C, piezoelectric constant of [Formula: see text] pC/N and hardness value of [Formula: see text][Formula: see text]GPa. These values are two orders of magnitude, over two times, and 1.36 times higher than those of pure CBN ceramic, respectively. This work provides a reference for exploring other bismuth-layered structural ceramics. |
| Document Type: | article |
| File Description: | electronic resource |
| Language: | English |
| ISSN: | 2010135X 2010-1368 2010-135X |
| Relation: | https://doaj.org/toc/2010-135X; https://doaj.org/toc/2010-1368 |
| DOI: | 10.1142/S2010135X24400198 |
| Access URL: | https://doaj.org/article/a6964840d12242f982ff0c5c67785341 |
| Accession Number: | edsdoj.6964840d12242f982ff0c5c67785341 |
| Database: | Directory of Open Access Journals |
| ISSN: | 2010135X 20101368 |
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| DOI: | 10.1142/S2010135X24400198 |
| Published in: | Journal of Advanced Dielectrics |
| Language: | English |