Preparation of Gallium Stannate Dense Sintered Body Using SPS Method

Abstract

Solid solution of Gallo-titanogallate type K_xGa₈Ga_8+xSn_16-xO₅₆ (1.2 ≤ x ≤ 1.6) and Hollandite type K₂Ga₂Sn₆O₁₆ were prepared by the solid state reaction method. Then, the most suitable process for obtaining dense sintered body was studied by conventional heat-treatment of uniaxial pressed pellet, hot isostatic pressing (HIP) and spark plasma sintering (SPS) process. Relative density of K_1.2Ga₈Ga_9.2Sn_14.8O₅₆ sintered body showed 94% in case of SPS process. Also, the obtained dense sintered body by SPS process showed tendency that the perpendicularity direction to uniaxial pressure had c-plane orientation. Therefore, SPS is promising process for obtaining oriented dense sintered body.