| 摘要 |
1,145,243. Coatings. GLAVERBEL. 18 March, 1966 [25 June, 1965], No. 12129/66. Heading B2K. Tin oxide coatings on glass or other material particularly electrically insulating material are produced by applying a solution of anhydrous stannous chloride in an anhydrous organic solvent, hydrolysing the tin chloride by contact with a moisture-containing atmosphere and then drying and baking the coating. The anhydrous stannous chloride solution may be applied by spraying, or dipping the article in the solution with withdrawal of the article from the solution at a controlled speed. Compounds which become converted into an oxide of another metal may be present in the solution. In the preferred embodiment stannous chloride solution is applied in an atmosphere at 25 to 35‹C., and hydrolysis achieved is an atmosphere with a relative humidity of less than 60%. The coatings are baked at 380 to 480‹C., .the drying and baking steps being performed in different furnaces, e.g. in furnaces having radiant heating elements fitted to its interior vertical walls. The coatings may be electrically conductive or semi-conductive and/or transparent, capable of reflecting light radiation. The article coated may be sheet glass which has subsequently to be cut into smaller pieces e.g. to be used in glazing units or as instrument dial glasses having antistatic properties. The tin oxide coating may be formed on previously formed coating(s) of the same or different composition. |
