Enhanced Dielectric and Piezoelectric Properties of Aurivillius‐Type Potassium Bismuth Titanate Ceramics by Cerium Modification
Enhanced Dielectric and Piezoelectric Properties of Aurivillius‐Type Potassium Bismuth Titanate Ceramics by Cerium Modification
复制标题
DOI：
10.1111/j.1551-2916.2008.02557.x
复制
发表时间：
2008-09
影响因子：
3.9
通讯作者：
Chun‐Ming Wang;Jin‐feng Wang;C. Mao;Xuefeng Chen;Xianlin Dong;Z. Gai;Ming‐lei Zhao
中科院分区：
文献类型：
--
作者：
Chun‐Ming Wang;Jin‐feng Wang;C. Mao;Xuefeng Chen;Xianlin Dong;Z. Gai;Ming‐lei Zhao
研究了CeO 2改性钛酸铋钾K 0. 5 Bi 4. 5 Ti4 O 15（KBT）压电陶瓷的显微结构、介电性能和压电性能。X射线衍射分析表明，铈改性的KBT陶瓷具有纯的四层Aurivillius型结构。铈掺杂显著提高了KBT陶瓷的压电性能，降低了介电损耗。经0.50wt%铈改性的KBT陶瓷的居里温度Tc和压电系数d33分别为550°C和28 pC/N。当铈含量达到1.00wt%时，居里温度从555° C逐渐降低到541°C。介电谱和退火谱表明，该材料具有稳定的压电性能。
The microstructure, and dielectric and piezoelectric properties of the CeO2-modified potassium bismuth titanate K0.5Bi4.5Ti4O15 (KBT) piezoelectric ceramics were investigated. X-ray diffraction analysis revealed that the cerium-modified KBT ceramics have a pure four-layer Aurivillius-type structure. The piezoelectric properties of KBT ceramics were significantly enhanced and the dielectric loss decreased by cerium doping. The Curie temperature Tc and piezoelectric coefficient d33 for the KBT ceramics with 0.50 wt% cerium modification were found to be 550°C and 28 pC/N, respectively. The Curie temperature was found to decrease gradually from 555° to 541°C with cerium modification up to 1.00 wt%. Dielectric and annealing spectroscopy showed that the materials possess stable piezoelectric properties.