HIGH PIEZOELECTRIC PROPERTIES OF BATIO3 CERAMICS PREPARED BY TWO-STEP SINTERING TECHNIQUE THROUGH CONVENTIONAL SOLID-STATE REACTION ROUTE
A two-step sintering technique was attempted to acquire BaTO3 ceramics with dense and small-grained microstructure through conventional solid-state reaction route, in which BaCO3 and TiO2 powders are adopted as the starting raw materials. It has been found that the two-step sintering technique is effective even for the synthesized BaTiO3 powder of submicron-sized particles. A BaTiO3 ceramic with relative density as high as 98.2％ and small grain size of about 1.7 fim was successfully obtained. Its dielectric and piezoelectric properties were investigated and compared with those of the ordinarily-sintered BaTiO3 ceramic under an optimized sintering condition. The ceramic prepared by the new technique shows high piezoelectric properties of d33 = 390 pC/N and fcp= 0.40 and is thus much superior to the ordinarily-sintered one, which displays only d33 = 300 pC/N and kp = 0.32. The results demonstrate that fabricating BaTiO3 ceramics with ideal microstructure and high piezoelectric properties at low cost is possible.
BaTiO3 ceramics High density Two-step sintering Piezoelectric properties Small grain size
Yong-qiang TAN Jia-liang ZHANG Zong ZHANG Chun-lei WANG
School of Physics, State Key Laboratory of Crystal Materials, Shandong University, Jinan 250100, China
国际会议
深圳
英文
589-593
2011-12-09（万方平台首次上网日期，不代表论文的发表时间）