Microstructure and Electrical Properties of Lanthanides-doped CaBi2Nb2O9 Ceramics
Microstructure and Electrical Properties of Lanthanides-doped CaBi2Nb2O9 Ceramics
复制标题
稀土掺杂CaBi2Nb2O9陶瓷的显微结构和电学性能
DOI：
10.1016/j.materresbull.2021.111670
复制
发表时间：
2021-12
影响因子：
5.4
通讯作者：
Feng Cao
中科院分区：
文献类型：
--
作者：
Zhihang Peng;Li Chen;Yang Xiang;Feng Cao
铌酸铋钙（CaBi_2Nb_2O_9，CBN）具有超高的居里温度（TC ≤ 223 ℃，940 °C），在航空航天、船舶、核工业等高温领域具有广阔的应用前景。采用固相烧结法制备了稀土离子改性立方氮化硼基陶瓷。研究了不同镧系元素（La，Ce，Nd，Sm，Dy，Er，Yb）掺杂CBN陶瓷的晶体结构、显微结构和高温电学性能，并对其机理进行了探讨。在这些掺杂离子中，Ce 3 +/Ce 4+掺杂CBN陶瓷表现出异常的电性能。采用阻抗分析法研究了镧系元素掺杂CBN陶瓷在高温下的电性能差异。结果表明，这些反常的电学性质是由Ce掺杂引起的氧空位引起的。这些结果可以帮助定制与镧系元素修饰的Aurivillius相陶瓷的电性能。
Calcium bismuth niobate (CaBi2Nb2O9, CBN) is a promising candidate for high-temperature applications in aerospace, shipping, and nuclear industries, owing to its ultra-high Curie temperature (TC∼x223C 940 °C). Lanthanide ions modified CBN based ceramics were prepared by a conventional solid-state sintering route. The crystal structure, microstructure, and high-temperature electrical properties of CBN ceramics doped by different lanthanide dopants (La, Ce, Nd, Sm, Dy, Er, Yb) were studied and the underlying mechanism was also discussed. Among these doping ions, Ce3+/Ce4+doping CBN ceramics exhibits anomalous electrical properties. Impedance analysis was introduced to clarify the difference in electrical properties of lanthanide-doped CBN ceramics at high temperatures. As a result, the anomalous electrical properties are attributed to the extrinsic oxygen vacancies induced by the Ce doping. These results could assist to tailor the electrical properties of Aurivillius phase ceramics with lanthanide modifications.
登录
查看更多内容
影响因子：
3.2
作者：
Zhiyong Zhou;Xianlin Dong;Haixue Yan;Heng Chen;C. Mao
通讯作者：
Zhiyong Zhou;Xianlin Dong;Haixue Yan;Heng Chen;C. Mao
影响因子：
3.4
作者：
TURNER, RC;FUIERER, PA;SHROUT, TR
通讯作者：
SHROUT, TR
影响因子：
5.4
作者：
J. Mercurio;A. Souirti;M. Manier;B. Frit
通讯作者：
J. Mercurio;A. Souirti;M. Manier;B. Frit
影响因子：
--
作者：
ABRAHAMS, SC;KURTZ, SK;JAMIESON, PB
通讯作者：
JAMIESON, PB
影响因子：
9.5
作者：
Man Zhang;Zhe Chen;Y. Yue;Tao Chen;Zhongna Yan;Q. Jiang;Bin Yang;M. Eriksson;Jianhua Tang-Jianhua
通讯作者：
Man Zhang;Zhe Chen;Y. Yue;Tao Chen;Zhongna Yan;Q. Jiang;Bin Yang;M. Eriksson;Jianhua Tang-Jianhua