| 摘要 |
<p>A thin film of metal oxide is formed adherent to a vitreous (glass) surface by projecting a fine powder of a metallic cpd. such as an acetyl acetonate thermally decomposable into the oxide. The powder is sprayed onto the glass which has been preheated to a temp. below the softening point of the glasS, but high enough to bring its resistivity to 1010 ohm-cms. A high potential difference is then applied between the glass and the spray appts. to give the powder an electric charge. Process is used for coating a glass, glass ceramic or refractory support, e.g. for a sunlight attenuating window or one with a electrically conducting surface. Process provides improved optical and electrical properties. It avoids the cooling effect on the glass surface obtained when a soln. of the metal cpd. is sprayed onto the surface, and the loss of heat energy used to evaporate the solvent. The coating adheres more strongly due to the slower cooling. It also avoids the problems of fire risk and air pollution when using org. solvents.</p> |
