Cerium doped Lu3Al5O12 phosphor ceramic plate was fabricated by solid state reaction and electric furnace reactive sintering method using commercial Lu2O3, α-Al2O3, and CeO2 powders as the starting materials, AlN or Al2O3 were used as sintering additives. When Al2O3 was used as sintering aid, the optimum dosage was 2 wt%. Although plate optical characteristics was slightly reduced and the difference was very small, whereas the thermal properties exhibited appreciable increase of more than 5%. The excellent feature of using compound additives is to make the intensified liquid sintering begin at a lower temperatures in electric furnace, promoting the densification rate and resulting in uncontaminated crystalline grains.

Keywords: Lu3Al5O12:Ce3+ Phosphor Ceramics Plate, AlN, Al2O3 as sintering aid.