| 摘要 |
<p>A method of producing a transparent electroconductive film on a surface of glass or refractory base without previously treating the surface to reduce the alkali metal content thereof comprises heating the surface to a temperature above 400 DEG F. and below the temperature at which the base becomes molten, and applying to the heated surface a composition having a pH between 4,5 and 7,0 and containing an organic tin compound (a long list of suitable compounds is given), an ionizable fluorinecontaining compound, e.g. HF, and an in-organic chlorine-containing compound, e.g. HCl. The surface may be ordinary window or soda-lime-silica glass, borosilicate glass, china, mica, phosphate glass, silicon carbide, tungsten carbide, porcelain or stone. The articles coated may be windows, cathode ray tubes and space heaters. In the examples glass sheets are coated by spraying and compared with sheets which have been pretreated by dipping in silicon tetrachloride solution and coated with a solution not containing a fluorine-containing compound. Other specified components of the solutions are ammonium acetate, glacial acetic acid and n-propyl alcohol.</p> |
