Method to make a reflective coating on high-pressure discharge l

Details Method to make a reflective coating on high-pressure discharge l Method to make a reflective coating on high-pressure discharge l

1989-08-29

1990-08-14

Lieberman, Paul

Compositions

Electrically conductive or emissive compositions

Metal compound containing

10628717, 10628719, 106311, 106450, 252352, 350 16, 350 17, C01B 3300, C01G 2500, C09D 100

Patent

active

049485300

ABSTRACT:
In the method for making a reflective coating at the ends of the discharge essel of a high-pressure discharge lamp, the suspension for making the coating includes from 0.5 to 5% by weight of a highly dispersed pyrogenic silicic acid - aluminum oxide mixture, 0 to 5% by weight of acetic acid, 0 to 1% by weight of boric acid, 24 to 55% by weight of water, and zirconium oxide to make up 100% by weight. By using the novel suspension, the previously required process steps of baking and white-burning can be omitted.

REFERENCES:
patent: 2495306 (1950-01-01), Zurcher
patent: 3889142 (1975-06-01), Keeffe
patent: 3928059 (1975-12-01), Ferrigno
patent: 3955987 (1976-05-01), Schaar et al.
patent: 3959524 (1976-05-01), Keeffe
patent: 4081714 (1978-03-01), Mossel et al.
patent: 4308186 (1981-12-01), Schreurs et al.
patent: 4529541 (1985-07-01), Wilms et al.
patent: 4689172 (1987-08-01), Czeiler et al.
patent: 4824807 (1989-04-01), Blount

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