MICROSTRUCTURE DEVELOPMENT OF TAPE CASTING BATIO3 CERAMICS

BaTiO3 based ceramics were prepared from a non-aqueous tape casting composition and sintered. The sintering temperature for the tape layers decreased when comparing with those of conventional ceramic material. The microstructure showed rest of second phases at the grain boundaries. The grain growth was small. This behaviour was related to the presence of phosphor, which was not eliminated in the sintering. Dielectric properties were in accordance with the microstructure. High dielectric constant values were due to the low grain size and the microstructural homogeneity.