BAI Gailing 1, GOU Li 2, RAN Junguo 2
(1. Taiyuan Institute of Technology, Taiyuan 030008, Shanxi, China; 2. Sichuan University, Chengdu 610065, Sichuan, China)
Abstract: Using Al(NO3)3•9H2O, Y2O3, Nd2O3, urea and NH4HCO3 as main raw materials, Nd:YAG nanopowders and transparent ceramics were respectively prepared by homogeneous method and co-precipitation. Powder morphology, phase, ceramic transmittance and structure of the samples prepared by these two methods were compared. Results show: the precursor prepared by homogeneous method was a looselyaggregated, pure phase powder formed when calcined at 1200 ℃, while the first YAP phase was formed. The precursor prepared by coprecipitation was hard, pure phase powder directly formed when calcined at 1000 ℃ After vacuum sintering and treatment, transparent ceramics with transmittance of 80% at 1064 nm could be obtained by these two methods. Co-precipitation is more suitable for industrial development under mild conditions and it’s easy to get pure phase of YAG.
Key words: homogeneous method; co-precipitation; Nd:YAG; transparent ceramics