Fabrication of textured Bi4Ti3O12 by templated grain growth

Dense, textured Bi4Ti3O12 was produced by templated grain growth (TGG). Phase pure nanosized Bi4Ti3O12 powder was prepared by coprecipitation of an aqueous solution of Bi2O3 and TiO(OH)Cl. Plate-like particles with aspect ratios of 6 - 60 were obtained by the molten salt method at 1100 degrees C. The plate-like particles were dispersed in the calcined powder and oriented by tape casting and laminating. The laminates were sintered from 900 - 1100 degrees C to obtained texuted ceramics up to 96% dense. Texture development was investigated by x-ray diffraction, and dielectric measurements were made on both templated and un templated samples.