Dielectric and piezoelectric enhancements in the BiFeO3-PbTiO3 solid solutions with Gd doping
Gadolinium doped BiFeO3-PbTiO3 ((Bi1-xGdx)FeO3-PbTiO3, BGF-PT) crystalline solution ceramics for x=0, 0.1, 0.2 and 0.3 are studied in this report. X-ray diffraction (XRD) result reveals that all ceramics are in single perovskite structure. Phase transition from rhombohedral to tetragonal is observed at x=0.1. Enhanced dielectric properties with k=863 and tanδ=0.023 at the frequency of 102 Hz are obtained in BGF-PT of x=0.2. The Curie temperature of BGF-PT for x=0.2 is achieved to 430 oC, which is much higher than La doped BiFeO3-PbTiO3. Significant piezoelectric enhancements is also found in the BGF-PT ceramics. Our results indicate that BGF-PT is a competitive high temperature piezoelectric material.
solid solution method dielectric properties piezoelectric properties
Guiyang Shi Jianguo Chen Yufa Qi Shengwen Yu Jinrong Cheng
School of Materials Science and Engineering,Shanghai University,Shanghai,200072,People’s Republic of China
国际会议
西安
英文
295-298
2009-08-23（万方平台首次上网日期，不代表论文的发表时间）