Chemical composition and tolerance factor at the morphotropic phase boundary in (Bi0.5Na0.5)TiO3-based piezoelectric ceramics

Wei Chih Lee, Chi Yuen Huang, Liang Kuo Tsao, Yu Chun Wu

研究成果: Article同行評審

73 引文 斯高帕斯(Scopus)

摘要

A quantitative relation between the morphotropic phase boundary (MPB) composition and the tolerance factor (t) in (Bi0.5Na0.5)TiO3 (BNT)-based piezoelectric ceramics was established. The t value of the MPB compositions in BNT-based ceramics is around 0.990-0.993 and is independent of the types of added compounds. In order to experimentally demonstrate it, two piezoelectric ceramic systems (1 - x)(Bi0.5Na0.5)TiO3-x(Ba1-aSra)TiO3, a = 0.05 and 0.3 (BNBST5-x and BNBST30-x, x < 12%), were used. X-ray diffraction patterns and the lattice parameter investigations revealed that these two systems formed solid solutions within the studied stoichiometry and showed a rhombohedral-tetragonal phase transformation. Furthermore, both the structure analysis and electric properties measurements indicated that the MPB compositions were BNBST5-6 and BNBST30-8 and their corresponding t value were 0.9900 and 0.9903, respectively. The results confirm the relation between the MPB composition and t value and provide a method for designing new piezoelectric materials.

原文English
頁(從 - 到)1443-1448
頁數6
期刊Journal of the European Ceramic Society
29
發行號8
DOIs
出版狀態Published - 2009 五月

All Science Journal Classification (ASJC) codes

  • 陶瓷和複合材料
  • 材料化學

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