1. 1 R. L. Coble , “Transparent Alumina and Method of Preparation”; US Patent 3026210.
2. Transparent Ceramic Lamp Envelope Materials;Wei,2005
3. Effect of Grain Size on Transmittance and Mechanical Strength of Sintered Alumina;O,2004
4. High-Power Nd;Lu,2000
5. Progress in Ceramic Lasers;Ikesue,2006