Phase microstructure evaluation and microwave dielectric properties of(1-x)Mg_(0.95)Ni_(0.05)Ti_(0.98)Zr_(0.02)O3-xCa_(0.6)La_(0.8/3)TiO3 ceramics

摘要

All the compositions in the(1-x)Mg_(0.95)Ni_(0.05)Ti_(0.98)Zr_(0.02)O3-xCa_(0.6)La_(0.8/3)TiO3(0 ≤ x ≤ 0.2)series were fabricated using solid state sintering route.Mg_(0.95)Ni_(0.05)Ti_(0.98)Zr_(0.02)O3 possessed excellent microwave dielectric properties with εr ≈ 17.1,Quf0 ≈ 195855 GHz,and τf ≈-46 ppm/°C.τf was tuned through zero by mixing with Ca_(0.6)La_(0.8/3)TiO3.In the present study,τf ≈-2 ppm/°C with εr ≈ 23.9 and high Quf0 ≈ 115870 GHz was achieved for x = 0.15,i.e.,for a mixture of 85% Mg_(0.95)Ni_(0.05)Ti_(0.98)Zr_(0.02)O3 and 15% Ca_(0.6)La_(0.8/3)TiO3.