XIE Zhixiang1, HONG Wenhai2, LI Yueming3 , WANG Zhumei4, SHEN Zongyang5, LIAO Runhua6
(Jiangxi Key Laboratory of Advanced Ceramic Materials, School of Materials Science and Engineering,
Jingdezhen Ceramic Institute, Jingdezhen 333403, Jiangxi, China)
Abstract:B2O3-doped 0.77Zn0.99Cu0.01Al2O4-0.23TiO2(ZCAT) was synthesized by conventional solid-state route, X-ray diffraction, scanning electron microscopy and network analyzer were employed to characterize its sintering character, microstructure and microwave dielectric properties, respectively. The effect of the B2O3 content on sintering and microwave dielectric properties was investigated. The result reveals that the addition of B2O3 could not change the crystal structure of ZCAT ceramics. The addition of B2O3 could reduce the sintering temperature, and the moderate addition of B2O3 could effectively improve the microwave dielectric properties. ZCAT ceramics doped with 0.75wt.% B2O3 sintered at 1300 ℃ exhibits the optimal dielectric properties: the dielectric constants εr= 9.96, the quality factor Q×f= 33280 GHz and the frequency temperature coefficient τf = 3.09×10-6/°C.
Key words:B2O3; the sintering performance; microwave dielectric properties