期刊论文详细信息
Bulletin of Materials Science
Synthesis, structural and dielectric properties of 0.8PMN–0.2PT relaxor ferroelectric ceramic
关键词: Relaxor;    dielectric properties;    perovskite;    pyrochlore;    sintering temperature.;   
学科分类:材料工程
来源: Indian Academy of Sciences
PDF
【 摘 要 】

A 0.8PMN–0.2PT solid-solution ceramic was synthesized by columbite processing technique. The effects ofsintering temperature on the density, structure and microstructure and in turn on the dielectric properties were investigated.The ceramics sintered at and above 1050$^{\circ}$C resulted in single-phase perovskite formation. However, high density $>$90% is achieved only after 1170$^{\circ}$C. Microstructural analysis revealed that grain size increases with increase in sintering temperature. Asignificant increase in the peak of dielectric permittivity only after 1150$^{\circ}$C owing to increase in density is noted in this study. The quadratic law applied to this ceramic demonstrates that the transition is diffused. The broadness in phase transition and lower dielectric relaxation obtained for the composition demonstrate that the ceramic exhibits characteristics of both relaxor and normal ferroelectrics. The ceramic of composition 0.8PMN–0.2PT exhibits excellent dielectric properties $\epsilon_{\rm r-max} = 20294$−27338 at 100 Hz with $T_c = 100$–96$^{\circ}$C at low sintering temperature 1170–1180◦C, respectively.

【 授权许可】

CC BY   

【 预 览 】
附件列表
Files Size Format View
RO201902180941126ZK.pdf 438KB PDF download
  文献评价指标  
  下载次数:8次 浏览次数:16次