ZnTiO3-based ceramics sintered at low temperature with boron addition for multilayer ceramic capacitor applications
Mixture of zinc metatitanate and rutile (ZnTiO3 + 0.2TiO2), had been prepared via the conventional solid-state reaction method. The sintering behavior and microwave dielectric properties of ZnO–TiO2 system were investigated. The composition and microstructure of ceramics were discussed with XRD and SEM. It was found that ZnO–TiO2 ceramics, which was sintered at 900°C using 1.0 wt% B2O3 as sintering additive, had homogeneously fine microstructures and high densification. Samples possessed excellent microwave dielectric properties: ε r = 26, Q × f = 34,890 GHz, and τ f = −11 ppm/°C. The above- mentioned material was suitable for the tape casting process and compatible with Ag electrodes, therefore, was an excellent candidate for multilayer ceramic capacitor applications.
KeywordsTiO2 Sinter Temperature B2O3 Microwave Dielectric Property Liquid Phase Sinter
This work was supported by the Ph.D. Programs Foundation of the Ministry of Education of China under Grant 20070561019, by the Province Science and Technology of Guangdong under Grant 2007B010600006, and by the Guangdong-Hong Kong Technology Cooperation Funding Scheme (TCFS) under Grant 2007A090604004.