PREPARATION AND MICROWAVE CHARACTERIZATION OF BA2-XSRXTI9O20 CERAMICS

Ba2-xSrx Ti-9 O-20 ceramics have been synthesised by conventional soli d state reaction for compositions covering the full solid solution ran ge (0 less than or equal to x less than or equal to 2.0). The microwav e dielectric properties, such as the dielectric constant epsilon(r), q uality factor Q(u), and the temperature coefficient of resonant freque ncy tau(f), were measured for the different compositions and were foun d to increase from 39 to 162 and from -20 to +204 ppm K-1 for epsilon( r) and tau(r), respectively, with increase in strontium content. The p hase constitution and microstructure were examined by X-ray diffractio n and scanning electron microscopy. (C) 1995 The institute of Material s.