0.85PZN-0.10BT-0.05PT陶瓷烧结工艺及性能

采用二次合成法制备了 0 .85Pb(Zn1/3Nb2 /3) O3 0 .1 0 Ba Ti O3 0 .0 5Pb Ti O3弛豫铁电陶瓷 ,探讨了烧结温度对陶瓷相结构和晶粒的影响 ,优化了烧结工艺 ,并在此基础上研究了陶瓷的介电性能和电致伸缩性能。结果表明 ,陶瓷中钙钛矿相的含量随烧结温度的升高而不断增加 ,而升高预烧温度对提高钙钛矿相的结构稳定性不利。优化烧结工艺后 ,获得了 1 0 0 %钙钛矿相的陶瓷 ,其峰值介电常数为 60 67,在电场为 2 0 0 0 V/ mm时电致应变可达 5.5× 1 0 -4 。

Sintering Processes and Properties of O. 85PbCZn1/3Nb2/3)03-0. lOBaTiOrO. 05PbTi03 Ceramics

In this paper, 0.85PZN 0.10BT 0.05PT relaxor ferroelectric ceramics were prepared by two step method. The effect of technological processes(such as calcining and sintering temperature) on the perovskite phase content and grain size of the specimens was investigated, and the dielectric properties and electrostrictive properties of the ceramics were also studied. It was shown that with the increase of sintering temperature the content of perovskite phase increased, but the increasing of calcining temperature would decrease the stabilization of perovskite structure. With the optimized technological processes the pure perovskite phase structured ceramics were prepared successfully and their macro properties were also measured.