中文摘要：

采用高温固相烧结法制备了Ba1-xSrxTi0.88Sn0. 12O3（x=0．10，0．20，0．30，0．40，0．50）陶瓷，研究了Sr含量及烧结温度对Ba1-xSrxTi0.88Sn0. 12O3陶瓷结构与介电性能的影响。XRD初步分析表明Ba1-xSrxTi0.88Sn0. 12O3陶瓷在室温为立方钙钛矿结构。进一步的研究表明Ba1-xSrxTi0.88Sn0. 12O3陶瓷的介电性能与对A位、B位进行的离子取代密切相关。随着Sr含量的增加，不同烧结温度下Ba1-xSrxTi0.88Sn0. 12O3陶瓷的介电性能下降，相变温度Tc移向低温。尽管在所研究的组分范围内Ba1-xSrxTi0.88Sn0. 12O3表现出扩散相变铁电体的特征，但是典型的介电弛豫行为并没有被观察到。

英文摘要：

Effects of Sr concentration and sintering temperature on microstructure and dielectric properties of Ba1-xSrxTi0.88Sn0. 12O3（x=0. 10, 0. 20, 0. 30, 0.40 and 0.50）ceramics prepared by a high temperature solid-state technique were investigated. A preliminary structural XRD analysis of these compounds shows the formation of cubic perovskite structure. Detailed studies show that the dielectric properties of these compounds are closely related to Sr^2＋ and Sn^4- ions substituting for A- and B-site in Ba1-xSrxTi0.88Sn0. 12O3 solid solutions ceramics. The dielectric properties of Ba1-xSrxTi0.88Sn0. 12O3 ceramics decrease and the temperature of the maximum dielectric constant Tc shifts to lower temperature with increasing x values. A typical relaxation behavior is not observed, though all studied compositions exhibit the broad diffused phase transitions.