Coating processes – Optical element produced – Transparent base
Patent
1985-10-18
1987-11-17
Bell, Janyce A.
Coating processes
Optical element produced
Transparent base
427160, 427164, 427166, 427226, B05B 506
Patent
active
047073837
ABSTRACT:
An improved process for coating the surface of a transparent refractory material such as glass with a semi-reflective film of tin oxide by depositing finely divided particles of a pyrolytically decomposable organotin compound on the surface of a substrate which has been heated to a temperature of between about 400.degree. and 650.degree. C. The finely divided organotin compound has a particle size not greater than about 20 microns. Before deposition, the organotin compound is mixed with a predetermined amount of finely divided particles of a compound containing a halogen constituent. Deposition is accomplished by suspending the mixture of both compounds in an anhydrous carrier gas which is projected onto the surface of the substrate. In an alternative process, a single compound containing both tin and halogen constituents is projected onto the surface of the pre-heated substrate by means of the anhydrous carrier gas.
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Mattes Gunther
Ortmanns Gunter
Bell Janyce A.
Saint Gobain Vitrage
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