Effect of sintering temperature on microstructure and electrical properties of (Bi0.5Na0.5)0.94Ba0.06TiO3 Piezoelectric Ceramics
SHI Jin-hua1,2, YANG Wan-min1*
(1 College of Physics and Information Technology, Shaanxi Normal University, Xi′an 710062, Shaanxi, China;2 Department of National Minority Preparatory, Ningxia University, Yinchuan 750021, Ningxia, China)
Abstract:
(Bi0.5Na0.5)0.94Ba0.06TiO3(BNBT6) piezoelectric ceramics are synthesized by using the conventional ceramic fabrication technique and the sintering temperature ranges from 1 120 to 1 180℃. The density, phase composition, microstructure, piezoelectric and dielectric properties of BNBT6 samples are investigated. The results show that all the BNBT6 samples are of high compacted density and consist of both rhombohedral and tetragonal phases. It is found that BNBT6 samples sintered at 1 160℃ are of the highest density (98% theoretical density) and good electrical properties: piezoelectric constant d33=131 pC/N, planar electromechanical coupling factor kp =0.297, dielectric constant εr=615, dielectric loss tan δ=0.020.
KeyWords:
(Bi0.5Na0.5)0.94Ba0.06TiO3; piezoelectric property; dielectric property; microstructure
