Solid-state reaction process has been used to fabricate (Ca0.8Sr0.2)(ZrxTi1-x)O-3 ceramics, and several characteristics of the (Ca0.8Sr0.2)(ZrxTi1-x)O-3 ceramics have been investigated. The substitution ratio effects on the different phase change and the quality factors of (Ca0.8Sr0.2)(ZrxTi1-x)O-3 ceramics were improved because of the solid solution of Zr4+ substitution in the B-site. An excess of Zr4+ resulted in the formation of high amount of secondary phase of CaZrO3 and SrZrO3 with higher quantity of substitution, affecting the microwave dielectric properties of (Ca0.8Sr0.2)(ZrxTi1-x)O-3 ceramics. The temperature coefficient of resonant frequency (tau(f)) of (Ca0.8Sr0.2)(ZrxTi1-x)O-3 ceramics also improved with increasing Zr content, and the variation in tau(f) was attributed to the formation of secondary phase of CaZrO3 and SrZrO3. (C) 2013 Elsevier Ltd. All rights reserved.