Piezoelectric properties and thermal stability of Ca0.92(Li,Ce)0.04Bi2Nb2−xWxO9 high-temperature ceramics

• Published in: Applied physics. A, Materials science & processing Vol. 119; no. 1; pp. 337 - 341
• Main Authors: Wang, Yadan, Wu, Jiagang, Peng, Zhihang, Chen, Qiang, Xin, Deqiong, Xiao, Dingquan, Zhu, Jianguo
• Format: Journal Article
• Language: English
• Published: Berlin/Heidelberg Springer Berlin Heidelberg 01.04.2015
• Subjects: Characterization and Evaluation of Materials; Condensed Matter Physics; Machines; Manufacturing; Nanotechnology; Optical and Electronic Materials; Physics; Physics and Astronomy; Processes; Surfaces and Interfaces; Thin Films; Mechanical Quality Factor; Piezoelectric Coefficient; Piezoelectric Property; Electromechanical Coupling Factor; Milled Powder
• ISSN: 0947-8396; 1432-0630
• DOI: 10.1007/s00339-014-8972-4

Ca 0.92 (Li,Ce) 0.04 Bi 2 Nb 2− x W x O 9 ( x  = 0.01–0.06) high-temperature piezoceramics were prepared by a conventional solid-state sintered method, and effects of W content on their piezoelectric properties were studied. All samples possess a pure Aurivillius-type structure, showing that Li, Ce, and W dopants have well diffused into the CaBi 2 Nb 2 O 9 lattice to form a solid solution. The doping with W slightly decreases the Curie temperature ( T C ) of the ceramics. In addition, the excellent electrical properties (e.g., d 33  ~ 16.1 pC/N, k p  ~ 9.58 %, Q m  ~ 4,767) and a high Curie temperature (e.g., T c  ~ 925 °C) are simultaneously obtained in the ceramics with x  = 0.04, together with an enhanced thermal stability of <900 °C. As a result, the investigated material system provides the promising potential applications in ultra-high-temperature environments.