Method of improving the conductivity and lowering the emissivity

Details Method of improving the conductivity and lowering the emissivity Method of improving the conductivity and lowering the emissivity

1986-08-25

1988-01-26

Bell, Janyce A.

Coating processes

Electrical product produced

Transparent base

427109, 427110, 427165, 427166, 427168, 4271262, 4271263, 427255, 4272552, 427299, B05D 512

Patent

active

047216328

ABSTRACT:
This specification is directed to a method of improving the conductivity and lowering the emissivity of a doped tin oxide film on the surface of a soda lime silica glass sheet. The method includes the steps of heating the glass sheet to a temperature in a range from 1000.degree. F. to 1250.degree. F. Thereafter, a fluorine-containing compound is applied to a surface of the heated glass sheet to react therewith to form a film in which divalent oxygen atoms and hydroxyl ions on the surface of the glass sheet are replaced with monovalent fluorine atoms. In this manner, the surface of the glass sheet is brought closer to a state of electro-neutrality and the monovalent fluorine atoms form a more stable bond with soda and silica atoms of the surface of the glass sheet. Thereafter, a doped tin oxide film is applied to the film formed on the heated glass sheet to a thickness required to give the doped tin oxide film the desired conductivity and emissivity characteristics.

REFERENCES:
patent: 2617741 (1952-11-01), Lytle
patent: 2617742 (1952-11-01), Olson
patent: 2617745 (1952-11-01), Raymond et al.
patent: 2695247 (1954-11-01), Junge
patent: 4410563 (1983-10-01), Richter et al.
patent: 4547400 (1985-10-01), Middleton et al.
patent: 4548836 (1985-10-01), Middleton et al.

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