Low temperature sintering and microwave dielectric properties of Li1.0Nb0.6Ti0.5O3 ceramics

Li1.0Nb0.6Ti0.5O3 (LNT) ceramics were prepared at 900 degrees C by adding B2O3-ZnO-La2O3 (BLZ) glass as sintering agent, and the densification process and the microwave dielectric properties of the material were investigated. The results show that the BLZ glass can effectively decrease the sintering temperature of the material. Beside the main crystal phase Li1.0Nb0.6Ti0.5O3, LaNbTiO6 is found in the material, which is believed to be the product of the reaction between LNT and BZL glass during sintering. Adding BZL glass to LNT ceramics leads to the decrease of dielectric constant k and the quality factor Q x f of the material, but at the same time, helps to improve the temperature coefficient of resonant frequency tau(f). The low firing Li1.0Nb0.6Ti0.5O3 ceramic is possessed with k approximate to 8, Q x f approximate to 4800GHz and tau(f) approximate to 11 X 10(-6)/degrees C.