| 摘要 |
PURPOSE:To control of color of golden sapphire, and to obtain uniform single crystal, packing aluminum oxide containing magnesium oxide and chromium oxide into a rubber tube, molding it, sintering it to growth crystal. CONSTITUTION:Aluminum oxide powder containing 0.01-2.0wt% magnesium oxide and 0.5-4.0wt% chromium oxide are packed into a rubber tube, and made into a bar raw material by a rubber press. It is sintered at about 1,600-1,700 deg.C for about 5-10hr to give a raw material rod. This raw mateial rod is set in a floating device. The floating device is provided with the reflector 1, the halogen lamp 2, the quartz pipe 3, the inlet 4, the gas outlet 5, the raw material rod 6, the seed crystal 7, the melt part 8, the rotary and the transfer shafts 9 and 10. The light rays of the halogen lamp 2 are collected on the melt part 8, a high temperature >=2,000 deg.C is obtained, the raw material and the seed crystal 7 are melted by it, to grow single crystal. |
