Effect of Zr<sup>4+</sup> on the structural and microwave dielectric properties of CaTiO<sub>3</sub> ceramics
Abid Zaman, Sarir Uddin, Nasir Mehboob, Asad Ali, Abid Ahmad, Khalid Bashir
Abstract
The new ceramic composite of Ca(ZrxTi1-x)O3 had been prepared using the conventional mixed oxide solid state reaction method. The effects of Zr4+ ions substation over Ti4+ ions on the microwave dielectric properties of the CaTiO3 ceramics were investigated. The phase analysis showed that the specimens Ca(ZrxTi1-x)O3 presented single phase with orthorhombic structure in the range of x = 0.0–0.7 when sintered at 1300 °C for 3 h. The addition of Zr4+ facilitated the formation of large round-like grains with porous microstructure. The solid solution with x = 0.7 sintered at 1300 °C for 3 h showed a good combination of dielectric properties: εr=64, Q*f=3937GHz and ρrel=81.08% (at 2.5 GHz).