| 摘要 |
PURPOSE:A dispersion of a silica fine powder is prepared, from which foreign substances are removed, then the product is mixed with an alkyl silicate to form a sol and the sol is made into gel and roasted to enable easy and low-cost product of quartz glass of high quality. CONSTITUTION:In the production of quartz glass through the sol-gel method using alkyl silicate and a fine silica powder, a dispersion of the fine silica powder is prepared and the coarse particles of silica and foreign substances such as dusts are removed. The dispersion is low in viscosity and the foreign substances can be removed by passing through a fine mesh filter. The resultant dispersion is mixed with an alkyl silicate to prepare a sol. The sol is converted into a gel, the gel is dried and sintered to give the objective quartz glass of high quality. |
