Effect of lithium salts addition on sintering temperature, cationic ordering and dielectric properties of Ba(Mg1/3Ta2/3)O3 ceramic

摘要

The effect of different lithium salts (LiF, Li2CO3, LiNO3) addition on sintering temperature, cationic ordering and dielectric properties of Ba(Mg1/3Ta2/3)O3 ceramic has been investigated. This perovskite was synthesised by solid state reaction from BaCO3, MgO and Ta2O5. It was shown that, by addition of LiNO3, the sintering temperature was decreased to 1300°C (versus 1550°C–1600°C for the pure Ba(Mg1/3Ta2/3)O3 ceramic) without altering dielectric properties at 1 MHz. A cationic ordering was also observed. Sintering with co-fired nickel electrodes in Ar/H2 atmosphere was also successfully performed for Multi Layer Ceramic Capacitors applications.