Sintering and Dielectric Characteristics of 0.3SrBi_4Ti_4O(15)-O.7SrBi_2Ta_(1.8)V_(0.2)O_9 Ceramic

摘要

SrBi_2Ta_(1.8)V_(0.2)O_9 and SrBi_4Ti_4O(15), tow layer structured bismuth compound ferroelectric materials were mixing before calcining and after calcining at 80()l>C. The influence of calcining condition on the dielectric characteristics and crystal structure of 0.3 SrBi_4Ti_4O(15)-0.7SrBi_2Ta_(1.8)V_(0.2)O_9 ceramics was developed with the aid of X-ray diffraction patterns, scanning electronic micrograph (SEM), and dielectric-temperature curves. From SEM observations, the sintered ceramics revealed a layered structure independent of calcining condition. Dielectric properties were investigated in the temperature of 60°C～ 600°C at 1MHz. It was found that the calcining condition and sintering temperatures had apparent influence on the crystal structure and the maximum dielectric constant (revealed at Curie temperature).