Effects of Mn-doping on the Piezoelectric and Ferroelectric Properties of (Na0.8K0.2)0.5Bi0.5TiO3 Ceramics
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.
(NaxK1-x)0.5Bi0.5TiO3 Mn-doping Piezoelectric properties Ferroelectric properties
Jiang Xiangping Li Longzhu Jiang Fulan Zheng Yanyan Liu Lihua
Department of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,333001,Jiangx Department of Material Science and Engineering,Jingdezhen Ceramic Institute,Jingdezhen,333001,Jiangx
国际会议
The Fifth China International Conference on High-Performance Ceramics (第五届先进陶瓷国际研讨会(CICC-5))
长沙
英文
69-71
2007-05-10(万方平台首次上网日期,不代表论文的发表时间)