Transparent Nd:YAG/YAG composite ceramics are synthesized by solid-state reaction method using highpurity Y2O3,Al2 O 3,and Nd2O3 powders as raw materials.The mixed powder compacts are sintered at 1780°C for 10 h under vacuum and annealed at 1450°C for20 h in air.The Nd:YAG/YAG ceramics exhibit a pore free structure with an average grain size of about 30 μm.The microstructure of the Nd:YAG/YAG composite transparent ceramics is studied and there is no interface between Nd:YAG and YAG ceramics.The Nd ion distribution in one grain is also studied,which shows that there is no segregation of Nd ions as in Nd:YAG crystals.
