Significant differences in NaNbO3 ceramics fabricated using Nb2O5 precursors with various crystal structures
文献类型：期刊论文
| 作者 | Li, W; Xia, X; Zeng, JT; Zheng, LY; Li, GR |
| 刊名 | CERAMICS INTERNATIONAL
 |
| 出版日期 | 2020-02-15 |
| 期号 | 3页码:3759 |
| ISSN号 | 0272-8842 |
| DOI | 10.1016/j.ceramint.2019.10.098 |
| 文献子类 | Article |
| 英文摘要 | NaNbO3 (NN)-based solid solutions show potential applications in energy storage capacitors, strain actuators, and electrocaloric cooling devices. However, NN ceramics with distinct structures, which are prepared using various Nb2O5 precursors, have not been studied. In this work, two types of Nb2O5 precursors were used, including coexisting orthorhombic and monoclinic phases (denoted as OM), and single orthorhombic phase (denoted as O). Phase structure, grain morphology, sintering characteristics, ferroelectric performance, dielectric properties, and thermal-expansion properties were systematically investigated. Rietveld refinement of XRD data revealed that synthesized and sintered samples showed different phase structures. The content of ferroelectric phase (Q phase, space group P2(1) ma) was 82.7% in synthesized NN-OM, whereas it was only 73.2% in synthesized NN-O; it was 33.8% in sintered NN-OM, while it was 18.6% in sintered NN-O. Raman spectra verified that the Q phase in NN-OM was more than that in NN-O. Curie temperature (T-c) of NN-OM was 363 degrees C, whereas T-c of NN-O was only 352 degrees C. Furthermore, compared with NN-O, NN-OM showed an inhomogeneous grain size distribution, lower optimum sintering temperature, higher phase transition temperature, stronger ferroelectric performance, and larger thermal-expansion displacement. Therefore, crystal structure of Nb2O5 has a great influence on the structure and performances of NN ceramics. |
| WOS关键词 | PHASE-TRANSITION ; SODIUM NIOBATE ; ELECTRICAL-PROPERTIES ; TEMPERATURE ; MICROSTRUCTURE ; DOMAINS |
| WOS研究方向 | Materials Science |
| 语种 | 英语 |
| 出版者 | ELSEVIER SCI LTD |
| 源URL | [http://ir.sic.ac.cn/handle/331005/28300]  |
| 专题 | 中国科学院上海硅酸盐研究所 |
| 推荐引用方式 GB/T 7714 | Li, W,Xia, X,Zeng, JT,et al. Significant differences in NaNbO3 ceramics fabricated using Nb2O5 precursors with various crystal structures[J]. CERAMICS INTERNATIONAL,2020(3):3759. |
| APA | Li, W,Xia, X,Zeng, JT,Zheng, LY,&Li, GR.(2020).Significant differences in NaNbO3 ceramics fabricated using Nb2O5 precursors with various crystal structures.CERAMICS INTERNATIONAL(3),3759. |
| MLA | Li, W,et al."Significant differences in NaNbO3 ceramics fabricated using Nb2O5 precursors with various crystal structures".CERAMICS INTERNATIONAL .3(2020):3759. |
入库方式： OAI收割
来源：上海硅酸盐研究所
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