中文摘要：

以无机盐和氧化物为原料，柠檬酸和乙二胺四乙酸（EDTA）为复合螯合剂，乙二醇为溶剂，采用溶胶-凝胶法制备了0．85Pb（Mg1／3Nb2／3）O3-0．15PbTiO3（PMN—PT）铁电陶瓷粉体及其烧结体．并通过XRD和SEM分析了PMN—PT钙钛矿相的形成和烧结体的显微结构．讨论了不同烧结温度对陶瓷显微结构、介电、铁电及压电性能的影响．结果表明采用溶胶-凝胶法制备的PMN-PT陶瓷适宜烧结温度为1100℃，比常规固相合成法制备PMN—PT陶瓷的温度低100～200℃，且该条件下烧结的陶瓷性能优异：d33=252pC／N，Pr=17．8μC／cm2．

英文摘要：

In this paper, 0.85 Pb （Mgl/3 Nb2/3）O3=0. 15PbTiO3 ferroelectric powders and ceramics were prepared by the sol-gel method using soluble inorganic salts and oxide as staring materials, citric acid and EDTA as complex chalet agent, ethylene glycol as solvent. XRD and SEM measurement were used to investigate the phase structure and microstrueture of PMN-PT. The influence of sintering tem- perature on microstructure, dielectric, ferroelectric and piezoelectric properties of the ceramics was also studied. The results showed that the proper sintering temperature of the ceramics papered by sol-gel method was 1 100℃ ,which was much lower than those of via ordinary sintering technique. In addition, the ceramics sintered at 1 100 ℃ possessed good properties：d33=252 pC/N,Pr=17.8 μC/cm2.