Silica low-reflection coatings for collector covers, by a dip-coating process

摘要: Abstract A procedure for the deposition of antireflection coatings onto collector cover plates, by means a dip-coating process using an ethanol-based colloidal silical sol, is described. By use this solar transmittance such plates can be increased increment 0.05 thus eliminating over 60 per cent reflectance losses. This increases daily heat output single-glazed flat plate factor approximately 1.1, and double-glazed units 1.2. These films deposited on glass some types plastic substrate. The abrasion resistance deposits improved greatly baking to 500°C. Outdoor weathering tests have shown probably adequate stability in applications.