화학공학소재연구정보센터
Journal of the American Ceramic Society, Vol.89, No.7, 2089-2095, 2006
Preparation of dense Ta2O5-based ceramics by a coated powder method for enhanced dielectric properties
A hybrid solution-coated powder method was used to reduce the sintering temperature of TiO2-modified Ta2O5 ceramics. This simple and effective method allowed chemical homogenization and densification to take place below a densification-impeding phase transformation, something that has not been achieved by traditional mixed oxide processing. Combining the coated powder method with a two-stage heat treatment (by which specimens were first densified and then transformed into the high dielectric constant H-Ta2O5 phase) enabled the realization of dense and homogeneous 92Ta(2)O(5)-8TiO(2) ceramics with dielectric constant values up to 280 at room temperature.