| 摘要 |
PURPOSE:To prevent warping, cracking, etc. in the manufacture of quartz glass by a sol-gel method, by removing a solvent from the periphery of a container to dry silica gel. CONSTITUTION:The hydrolyzate of ethyl silicate is poured into a container 4 such as a laboratory dish, and the container 4 is covered with a flat plate 5 of glass, acrylic resin or the like with a spacer 6 in-between. After fixing the plate 5 with clips, the container 4 is placed in a dryer and allowed to stand at a constant temp. for a suitable time. The solvent is removed efficiently and uniformly from the periphery of the container 4, and dry gel is obtd. without causing cracking, warping, etc. By calcining the dry gel, the desired quartz glass is obtd. simply and inexpensively. |
