| 摘要 |
PURPOSE:To stably glass produce without generating cracks by mixing a thickener and glass raw material particles of a specific grain size with a sol liquid contg. alkoxide of silicon as a raw material, gelling the mixture, drying the gel and sintering the same. CONSTITUTION:Alkoxide of Si such as Si(OCH3)4 is used for at least one of the raw materials and others such as ethanol and ammonia are added thereto to obtain the 1st sol liquid which can be gelled. The powder contg. the thickener and glass raw material particles of 1mu grain size or above are mixed with the 1st sol liquid, by which the 2nd sol liquid is obtd. The above-mentioned thickener is preferably the pulverous particles of the glass raw material and the adequate grain size thereof is about 0.005-1mu. The secondary particles of average 1-100mu grain size formed by flocculating the pulverous particles of the glass raw material are used as the above-mentioned powder and are preferably crushed partly in the stage of mixing so as to act as the thickener for the pulverous particles. The above-mentioned 2nd sol liquid is gelled and is sintered after drying, by which the glass is obtd. without generating cracks. |
