The microstructure and dielectric properties of SrTiO3 modified 0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3 ceramics
The microstructure and dielectric properties of ferroelectric solutions which is formulated with (1-x)0.9Pb(Mg1/3Nb2/3)O3-0.1PbTiO3-x mol％ SrTiO3 (x=0, 1, 3 and 5) have been investigated. The ceramics was fabricated by a modified columbite route sintered at 1200 °C. The effects of dopants on microstructure, maximum dielectric constant (εm) and diffuseness of the phase transition, etc. have been studied. It is found that the maximum permittivity (εm) increases to 24968 for the ST-doped (1 mol ％) sample, subsequently decreases with ST addition and its corresponding phase-transition-temperature (Tm) shifts to the lower temperature. The variation of εm is caused by the decrease of polar nano-region size, increase of the fluctuation of the component and the increase of the effective spontaneous polarization. The enhancement of relaxor behavior in the PMN-PT sample is explained by the decrease of FE/AFE coupling.
Relaxor ferroelectrics dielectric properties diffuse phase transition
Liu Jingsong Li Tao Li Huiqin Xu youchao Yu Jiqiang
State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials,Southwest Uni State Key Laboratory Cultivation Base for Nonmetal Composites and Functional Materials,Southwest Uni
国际会议
11th IUMRS International Conference in Asia(第十一届国际材联亚洲材料大会 IUMRS-ICA 2010)
青岛
英文
433-438
2010-09-25（万方平台首次上网日期，不代表论文的发表时间）