Abstract: Na1/2La1/2Cu3Ti4O12 powder and ceramics were successfully achieved by sol-gel method.Effect of concentration, pH value and the molar ratio of the water and titanium of the sol on microstructure of NLCTO powder and ceramics were investigated in detail, respectively.The results found that the concentration, pH value and the molar ratio of the water and titanium of the sol for 0.75-1.0 mol/L, 0.3-1.3 and 11.0, respectively, after calcining at 800 ℃ for 10 h,NLCTO powder show more dispersion and homogeneity.Based on the superior NLCTO powder, dielectric constant of the prepared NLCTO ceramics increased to 1.9×104, and dielectric loss decreased to 0.039.

Key words: sol-gel method;NLCTO;microstructure;dielectric performance