Dielectric ceramics based on the ZrO/sub 2/-SnO/sub 2/-TiO/sub 2/ ternary system for microwave and millimeter wave applications

This work describes the investigations of (Zr/sub 0.8/Sn/sub 0.2/)TiO/sub 4/ compounds prepared by solid-state reaction techniques. The effect of La/sub 2/O/sub 3/, ZnO and NiO addition on microwave dielectric properties was investigated. The samples were sintered at temperatures T/sub s/=1280 -1400 /spl deg/C. The materials exhibit a dielectric constant /spl epsiv//sub r//spl sim/36 and high values of the Q/spl middot/f product from 30,000 to 55,000 at microwave frequencies. The measured temperature coefficient of the resonance frequency /spl tau//sub f/ takes values in the range (-2/spl divide/+4) ppm//spl deg/C.