The optimum calcination and sintering conditions of BaWO4 ceramics and the resulting microwave dielectric properties were investigated. Synthesis of BaWO4 was carried out from 600℃ lower than the decomposition temperature of BaCO3, the starting mate...
The optimum calcination and sintering conditions of BaWO4 ceramics and the resulting microwave dielectric properties were investigated. Synthesis of BaWO4 was carried out from 600℃ lower than the decomposition temperature of BaCO3, the starting material. It is revealed that the optimum sintering condition was 940°C for 1 hour, and the sintering density at this condition was 95.35%. Sintering above 940℃ resulted in rapid grain growth, and accordingly, residual pores existed and sintered density decreased. As a result, the dielectric constant () and quality factor () also tended to decrease with the increase of the sintering temperature. BaWO4 ceramics showed a dielectric constant of 8.9 and a quality factor of 38,324 GHz under the sintering temperature condition of 940℃ for 1 hour.