Effects of Mn-doping on the Piezoelectric and Ferroelectric Properties of (Na0.8K0.2)0.5Bi0.5TiO3 Ceramics

摘要：

　　Lead-free piezoelectric ceramics of (Na0.8K0.2)0.5Bi0.5TiO3+x wt.% Mn (abbreviated as NBKT-x% Mn,x=0~0.5) were synthesized by solid-state reaction.The grain growth of the ceramics was restrained by Mn-doping at a certain extent.The mechanical quality factor Qm increases and the dielectric loss tanδ decreases with the increase of Mn-doping.Best piezoelectric properties were obtained for the composition ofNKBT-0.2%Mn:d33=158 pC·N-1,tanδ=2.9% at 1 kHz,Qm=110 and kp=30%.The P-E loops show that remnant polarization Pr and coercive field Ec decrease slightly with the amount of the Mn2+ increasing up to 0.2wt.% and then increase as the content of Mn2+ increases further.NKBT-0.5wt.% Mn exhibits strong ferroelectricity with remnant polarization Pr =38μC/cm2.

关键词： (NaxK1-x)0.5Bi0.5TiO3 Mn-doping Piezoelectric properties Ferroelectric properties

作者: Jiang Xiangping Li Longzhu Jiang Fulan Zheng Yanyan Liu Lihua

作者单位: Department of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,333001,Jiangx Department of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,333001,Jiangx

会议类型: 国际会议

会议名称: The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))

会议地点: 长沙

会议语种:英文

页码: 69-71

在线出版日期: 2007-05-10（万方平台首次上网日期，不代表论文的发表时间）