| 摘要 |
<p>Amorphous synthetic quartz powder having few amounts of the residual carbon, its process for producing, and the synthetic quartz crucible are proposed. The process for producing of the synthetic quartz powder, wherein the silica gel powder made by wet process is baked to obtain dried silica powder under an air atmosphere preferably and at the temperature from more than removing the hydroxyl group to less than powder sintering, and said dried silica powder is baked under the low pressure atmosphere of less than 100Pa, preferably less than 50Pa, and at a temperature being from more than decarbonizing to less than powder sintering.</p> |
