中文摘要：

采用固相反应法制备Ca1–3xLn2xTiO3（x=0.130,.20;Ln=La,Nd,Sm）陶瓷,探讨了Ln系元素的含量对其物相组成、显微结构及微波介电性能的影响。结果表明：除Ca0.4Sm0.4TiO3陶瓷含有少量的Sm2Ti2O7第二相外,其他均形成了正交钙钛矿结构单相固溶体;随Ln3＋的含量增加,介电常数随之降低,同时谐振频率温度系数明显降低。x=0.13时的微波介电性能更佳：ε=120、Qf=10700GHz、τf=304×10–6/°C（Ln=La）;ε=109、Qf=14900GHzτ、f=236×10–6/°C（Ln=Nd）;ε=102、Qf=11600GHz、τf=212×10–6/°C（Ln=Sm）。

英文摘要：

Ca1-3xLn2xTiO3（x=0.13,0.20;Ln=La,Nd,Sm） ceramics were prepared by solid state reaction method.The influences of Ln3＋ content on phase composition,microstructure and microwave dielectric properties of Ca1-3xLn2xTiO3 ceramics were investigated.The results show that single orthogonal perovskite structure phase was formed except that a little secondary phase Sm2Ti2O7 was detected by XRD analysis when x=0.20 and Ln=Sm.Dielectric constant（τf） and temperature coefficient of resonant frequency（τf） decreased with the increasing Ln3＋ content.The Ca1-3xLn2xTiO3 ceramics with perferable microwave dielectric properties were obtained when x=0.13： ε=120,Qf=10700GHz,τf=304×10-6/°C（Ln=La）;