Preparation of glass coated with silicon oxide

Abstract

Abstract PURPOSE:To prepare silicon oxide film easily on the surface of glass contg. silicon oxide by dipping glass contg. silicon oxide. in satd. aq. soln. of silicon oxide contg. silicofluoric acid and boric acid. CONSTITUTION:The water 3 in an external tank 1 is heated with a heater 4 and the temp. is held uniformly at 35 deg.C by a stirrer 5. An internal tank 2 comprising a front part 6, middle part 7, and a rear part 8 is inserted into the external tank 1, and treating liquid prepd. by mixing aq. silicofluoric acd soln. of 2mol/l concn. and saturated with silicon oxide and aq. boric acid soln. of 0.5mol/l concn. in 25:1 proportion by volume is charged in said internal tank 2. Soda-lime glass having purified surface is dipped in the middle part 7 of the internal tank 2 to form silicon oxide film on its surface and the reflection factor for light of the surface is reduced. In this case, >=3% of the treating liquid is always pumped out with a pump 10, and precipitated silicon oxide in the liquid is removed with a filter 11 and the liquid is returned again to the front part of the internal tank, and aq. boric acid soln. 12 is dripped thereto continuously.

Inventors

• 👤 Hideo Kawahara
• 👤 秀夫 河原
• 👤 Hirotsugu Nagayama
• 👤 永山　裕嗣
• 👤 Hisao Honda
• 👤 本多　久男

Bibliographic Details