Preparation and dielectric properties of Sr(Ti0.95Zr0.05)O3 ceramics doped with CaO—TiO2—SiO2(CTS).

Sr(Ti0.95Zr0.05)O3 ceramic was sintered using xmol.% CTS (x=0, 0.5, 1.5, 4, 7) as sintering additive for the first time. Although Sr(Ti0.95Zr0.05)O3 ceramic could not be fully sintered even at 1420°C, the densification temperature could be decreased to 1280°C by using CTS, which begin melting when temperature reaches higher than 1150°C. The microstructures of the samples were characterized by X-ray diffraction (XRD), scanning electron microscopy (SEM). Apparent density and the dielectric properties were established at room temperature. The measuring frequency was 1MHz. The microstructure and dielectric properties greatly changed depending on the amount of CTS additive. The optimum concentration to obtain nicer dielectric properties was 0.5mol.%. [Copyright &y& Elsevier]