Solubility limits and microwave dielectric properties of Ca(ZrxTi1-x)O3 solid solution

The Ca(ZrxTi1-x)O-3 ceramic was prepared by solid state reaction method. Structural characterizations were performed by means of XRD, FT-Raman and FTIR. The formation of monophasic compounds obtained in the composition x = 0.0-0.2 and 0.9-1.0 were confirmed from XRD, FT-Rama and FTIR spectroscopy. However the compositions between x = 0.3 and 0.8 showed presence of mixed phase or secondary phase. The microwave dielectric constant, Q x f and tau(f) changed from 158 to 141, 4321 to 5945 and from 843.9 to 732.33 ppm/degrees C respectively in the composition between x = 0.0 and 0.2. The anomalous results of dielectric constant, Q x f and tau(f) values in the composition between x = 0.3 and 0.8 were observed. The microwave dielectric constant and tau(f) were found to be decreased from 42 to 27 and 81.75 to -19.98 ppm/degrees C in the composition between x = 0.9 and 1.0 respectively. The Q x f values increased from 10728 to 16543 with the increase of x value from 0.9 to 1.0. The dielectric resonator antenna (DRA) was investigated experimentally and numerically using a monopole antenna through an infinite ground plane and Ansoft's high frequency structure simulator software, respectively. The required resonance frequency and bandwidth of DRA were investigated in the composition between 0 <= x <= 1.0. (c) 2012 Elsevier B.V. All rights reserved.