EFFECTS OF B2O3 ADDITION ON SINTERING BEHAVIOR AND MICROWAVE DIELECTRIC PROPERTIES OF Mg4Ta2O9 CERAMICS PREPARED BY THE SOL GEL METHOD
Sintering characteristics and microwave dielectric properties of Mg4Ta2O9 5wt% B2O3 ceramics were investigated. With the sintering temperature increasing in the range of 1100C 1350C, the apparent density, er and Qf values increased firstly and then saturated at 1250C with excellent microwave properties: er~12.1, Qf~77,575GHz and tf~ 40ppm/C. Compared to the pure MT ceramics, the B2O3 additives effectively decreased the sintering temperature of MT ceramics and had no detrimental effect on the properties of the MT ceramics due to the liquid phase effect.