| 摘要 |
PURPOSE:To obtain a transparent quartz glass prevented from bubbling during high-temp. treatment by sintering a dried gel obtained by the sol-gel method using alkyl silicate and fine silica powder as raw materials in an He atm. reduced in pressure. CONSTITUTION:A sol composed essentially of alkyl silicate and fine silica powder, etc. is treated with heat. The obtained dried gel is sintered in an He atm. reduced in pressure. Moisture and org. residues can be perfectly removed by this method, phenomena of bubbling, devitrification, etc. can be prevented, and therefore, transparent quartz glass can be manufactured at low cost even when it is subjected to high temp. heat treatment. |
