中南大学学报（自然科学版）2013，Vol.44Issue(4)：1380-1384,5.
高温无铅压电陶瓷BFMT-BT的微结构与电性能
Microstructure and electrical properties of high-temperature BFMT-BT Pb-free ceramics
摘要
Abstract
A high-temperature perovskite-type 0.71BiFe1-x(Mg1/2Ti1/2)xO3-0.29BaTiO3 (abbreviated as BFMTx-BT) lead-free piezoelectric ceramics was prepared by a conventional ceramic sintering technique. The effect of Bi (Mg1/2Ti1/2)O3(BMT) addition on microstructure, piezoelectric, dielectric and ferroelectric properties was investigated. The addition of BMT has no remarkable effect on the crystal structure within the studied doping content; however, an obvious decrease in Curie temperature took place. The characteristics of relaxor and diffuse phase transition were more obvious with the increase of BMT content. The coercive field Ec decreased with the increase of the amount of BMT and the remanent polarization Pr almost kept same values when χ≤0.06. The piezoelectric constant d33 increased obviously and the electromechanical coupling factor kp decreased with BMT addition. The excellent piezoelectric properties of d33=155 pC/N and high Curie temperature of tc=420 ℃were obtained at χ=0.03.关键词
压电陶瓷/钙钛矿结构/弛豫特性/高温Key words
piezoelectric ceramics/ perovskite/ relaxor characteristics/ high-temperature分类
信息技术与安全科学引用本文复制引用
单旭,周昌荣,杨华斌,周沁,成钧,陈国华,李伟洲..高温无铅压电陶瓷BFMT-BT的微结构与电性能[J].中南大学学报（自然科学版）,2013,44(4):1380-1384,5.基金项目
广西自然科学基金重点资助项目(2010GXNSFD013007) （2010GXNSFD013007）
广西自然科学基金资助项目(2010GXNSFB013010) （2010GXNSFB013010）
广西教育厅重点项目(201012MS083) （201012MS083）
广西信息材料重点实验室资助项目(桂科能1110908-09-Z) （桂科能1110908-09-Z）
