Investigation of Low Loss Ceramic Technology

The compositions and technology for low loss ceramic were discussed in this paper.Low loss ceramic was prepared by Al2O3 powder and some additives,for example of MgO.The additives were deposited on Al2O3 powder in liquid solution,enwrapping the surface of Al2O3 powder uniformly to make composite powder.The compact ceramic was prepared by two-sinter technology to ensure densification and perfect microstructure.Bending strength,phase composition,micro-morphology and dielectric loss of the low-loss ceramic sample were measured. The dielectric loss of the ceramic is 6.84×10-4.This research work supports the application of low-loss ceramic in microwave and millimeter-wave medium.