Influence of Zn-Al Codoping on Dielectric Properties of 0.95MgTiO3-0.05CaTiO3 Ceramics

The dielectric properties of (Mg0.95Ca0.05Zn0.02)(Ti1-xAlx)O3 ceramics prepared by conventional solid-state route were investigated. The results show that MgTiO3 and CaTiO3 are the main phases of 95MCT ceramics with codoped Zn-Al, without second phase MgTi2O5 is observed but a new phase CaAl2O4. Zn-Al additive can lower the sintering temperature of 95MCT ceramics to 1300 and improve the dielectric properties. Moreover, it also effectively adjusts the temperature coefficient of dielectric constant. The 95MCT ceramics with x=0.02 possess excellent dielectric properties: dielectric constant |üSUB>r of 20.35, dielectric loss tg| of 2.0 06 and temperature coefficient of dielectric constant | SUB>c value of 1.78 06.