For preparation of Bi3.5La0.5Ti3O12(BLT)ceramics with high density,Bi3.5La0.5Ti3O12 powder was prepared by the coprecipitation method,and Bi3.5La0.5Ti3O12 ceramics were sintered with amorphous silica sol as sintering additive by different sintering processes to investigate the effect of additive on the relative theoretical density,microstructure,ferroelectric properties of Bi3.5La0.5Ti3O12 materials.The results of microstructure analysis show that the grain growth of Bi3.5La0.5Ti3O12 ceramic was improved by...