C - Chemistry – Metallurgy – 23 – C
Patent
C - Chemistry, Metallurgy
23
C
117/114
C23C 20/06 (2006.01) C03C 17/25 (2006.01)
Patent
CA 1232798
ABSTRACT: Providing a transparent layer of an oxide of an element from group IVB of the Periodic Table, notably TiO2, by providing a substrate with a solution of a compound of the element which upon heating is converted into the relevant oxide, drying the film and heating the dried film so as to form the transparent layer of the oxide. The oxide thus obtained is a form having a comparatively low refractive index. By heating the product, after providing the film, rapidly to a temperature of above 700°C, preferably above 1,000°C, keeping it at this temperature for some time and then rapidly cooling it again, a modification having a higher refrac- tive index (for example, for TiO2 rutile) is obtained.
462120
Biermann Udo K.p.
Haisma Jan
Heller Petrus
Pasmans Johannes M.m.
N.v.philips'gloeilampenfabrieken
Van Steinburg C.e.
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