【摘要】 探讨了烧结温度、组成和稀土元素对Ca1-3xLn2xTiO3(x=0.13,0.2:Ln=La,Nd,Sm)陶瓷的晶体结构、微波介电性能的影响。X射线衍射(XRD)分析表明,除Ca1-3xLn2xTiO3(x=0.2;Ln=Sm)陶瓷中含有少量的第二相(Sm2Ti2O7)外,其余Ca1-3xLn2xTiO3(x=0.13,0.2;Ln=La,Nd,Sm)陶瓷均形成了单一正交钙钛矿相。x=0.13的样品微波介电性能明显优于相应的x=0.2的样品。部分Ca1-3xLn2xTiO3(x=0.13,0.2;Ln=La,Nd,Sm)陶瓷微波介电性能如下:ε=119.6、Qf=10674GHz、τf=304.4×10-6/℃(x=0.13、Ln=La);ε=108.9、Qf=14919GHz、τf=236.2×10-6/℃(x=0.13、Ln=Nd);ε=101.3、Qf=14485GHz、τf=186.6×10-6/℃(x=0.13、Ln=Sm)。更多还原

【Abstract】 The effects of sintered temperature,composition and rare earth ions on the crystal structure and microwave dielectric properties of Ca1-3xLn2xTiO3(x=0.13,0.2;Ln=La,Nd,Sm) ceramics were investigated.From the X-ray diffraction patterns,orthorhombic perovskite phase was formed in Ca1-3xLn2xTiO3(x=0.13,0.2;Ln=La,Nd,Sm) ceramics,while the secondary phase Sm2Ti2O7 was formed in Ca1-3xLn2xTiO3(x=0.2;Ln=Sm) ceramic.The microwave dielectric properties of the samples at x=0.13 are better than that of the samples at x=0.2.Ca1-3xLn2xTiO3(x=0.13,Ln=La,Nd,Sm) ceramics display the microwave dielectric properties as follows:ε=119.6,Qf=10 674 GHz,τf=304.4×10-6/℃ for Ln=La;ε=108.9,Qf =14 919GHz,τf =236.2×10-6/℃ for Ln=Nd;ε=101.3,Qf=14 485GHz,τf = 186.6×10-6/℃ for x=0.13,Ln=Sm.更多还原