Phase Composition and Microstructure of Ca1-3xLn2xTiO3 (Ln=La, Nd, Sm)Ceramics

摘要

Ca1-3xLn2xTiO3 (Ln=La,Nd,Sm; x=0.13,0.20) ceramics were investigated systematically to dicuss the influences of sintering temperature,compositions,Ln3+ ions on its sintering property,crystal structure and microstructure.The results show that the dense ceramics were obtained in the sintering temperature range of 1300～1350 °C and the relative density reached over 97％.Sintering temperature was 50～150 °C lower than previous reports.Single orthogonal perovskite structure phase was formed except that a little secondary phase Sm2Ti2O7 was detected by XRD analysis when x=0.20 and Ln=Sm.The growth pattern of Ca1-3xLn2xTiO3 grains was terracing growth.