高居里点BiScO_3-PbTiO_3压电陶瓷介电压电性能研究  

Dielectric and Piezoelectric Properties of BiScO_3-PbTiO_3 Piezoelectric Ceramics with High Curie Temperature

作　　者：郝俊杰[1] 王晓慧[2] 陈先中[1] 李龙土[2] 

机构地区：[1]北京科技大学,北京100083 [2]清华大学新型陶瓷与精细工艺国家重点实验室,北京100084

出　　处：《稀有金属材料与工程》2011年第4期705-707,共3页Rare Metal Materials and Engineering

基　　金：国家自然科学基金(50472006);北京科技大学校基金

摘　　要：用通常的固相反应法制备了(1–X)BiScO3-XPbTiO3(X=0.60,0.62,0.64,0.66,0.68)系压电陶瓷,并对其进行了微结构和介电、压电性能研究。XRD分析表明,该系统在PbTiO3摩尔分数X=0.64时,存在准同相界,当X小于0.64或大于0.64时,陶瓷分别为菱方相和四方相结构。相结构在准同相界的试样具有最大的压电常数,其d33高达430pC/N。介温谱测试表明,该陶瓷体系居里温度为450℃左右,具有弛豫铁电体特征。（1–X）BiScO3-XPbTiO3（X=0.60, 0.62, 0.64, 0.66, 0.68） piezoelectric ceramics were synthesized by a conventional solid-reaction method, and their microstructure and piezoelectric/dielectric properties were investigated. XRD results show that there is morphotropic phase boundary （MPB） when X=0.64, the samples are rombohedral phases when X0.64, and tetragonal phases when X0.64. The maximum piezoelectric constant of 430 pC/N is obtained with the MPB composition. The dielectric-temperature test results indicate that BiScO3-PbTiO3 system is relaxor ferroelectric and has a very high Curie temperature of 450 oC.

关 键 词：压电 准同相界 居里温度 钪酸铋 

分 类 号：TM282[一般工业技术—材料科学与工程]