标题：HIGH PIEZOELECTRIC PROPERTIES OF BATIO(3) CERAMICS PREPARED BY TWO-STEP SINTERING TECHNIQUE THROUGH CONVENTIONAL SOLID-STATE REACTION ROUTE
作者：Tan, Yong-qiang; Zhang, Jia-liang; Zhang, Zong; Wang, Chun-lei
作者机构：[Tan, Yong-qiang; Zhang, Jia-liang; Zhang, Zong; Wang, Chun-lei] Shandong Univ, Sch Phys, State Key Lab Crystal Mat, Jinan 250100, Peoples R China.
会议名称：Symposium on Piezoelectricity, Acoustic Waves and Device Applications (SPAWDA)
会议日期：DEC 09-11, 2011
来源：2011 SYMPOSIUM ON PIEZOELECTRICITY, ACOUSTIC WAVES AND DEVICE APPLICATIONS (SPAWDA)
关键词：BaTiO3 ceramics; High density; Two-step sintering; Piezoelectric; properties; Small grain size
摘要：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 mu m 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 d(33) = 390 pC/N and k(p) = 0.40 and is thus much superior to the ordinarily-sintered one, which displays only d(33) = 300 pC/N and k(p) = 0.32. The results demonstrate that fabricating BaTiO3 ceramics with ideal microstructure and high piezoelectric properties at low cost is possible.