Film coated glazing having a protective layer of mixed titanium oxide
First Claim
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1. An essentially transparent glazing comprising a system of films deposited under vacuum by magnetron and having antisun properties, low-emission properties, or both properties, the system of films comprising:
- a silver-comprising infrared-reflecting layer;
a metal oxide barrier layer contacting and covering the infrared-reflecting layer, a dielectric layer on which the infrared-reflecting layer is deposited, or both; and
a top coat comprising a mixed oxide, the mixed oxide comprising titanium oxide and at least one other metal oxide of high hardness selected from the group consisting of;
ZrO2, SiO2, and Cr2O3,whereincolorimetric characteristics of light transmission (Tv), of layer-side reflection (Re), and of glass-side reflection (Ri), are such that, in the CIELAB coordinates for 10°
, variations observed in the glazing, before and after heat treatment at 550°
C. for 5 minutes, satisfy a relationship;
Δ
E=[(Δ
L*)2+(Δ
a*)2+(Δ
b*)2]1/2≦
4,for each transmission and reflection.
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Abstract
The present invention relates to essentially transparent glazings comprising a system of films deposited under vacuum by magnetron, and having antisun and/or low-emission properties, comprising as protective surface layer a layer based on titanium oxide and on at least one other metal oxide of high hardness from the group comprising: ZrO2, SiO2, Cr2O3. The glazings according to the invention are of “matchable” type.
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21 Claims
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1. An essentially transparent glazing comprising a system of films deposited under vacuum by magnetron and having antisun properties, low-emission properties, or both properties, the system of films comprising:
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a silver-comprising infrared-reflecting layer; a metal oxide barrier layer contacting and covering the infrared-reflecting layer, a dielectric layer on which the infrared-reflecting layer is deposited, or both; and a top coat comprising a mixed oxide, the mixed oxide comprising titanium oxide and at least one other metal oxide of high hardness selected from the group consisting of;
ZrO2, SiO2, and Cr2O3,wherein colorimetric characteristics of light transmission (Tv), of layer-side reflection (Re), and of glass-side reflection (Ri), are such that, in the CIELAB coordinates for 10°
, variations observed in the glazing, before and after heat treatment at 550°
C. for 5 minutes, satisfy a relationship;
Δ
E=[(Δ
L*)2+(Δ
a*)2+(Δ
b*)2]1/2≦
4,for each transmission and reflection. - View Dependent Claims (2, 3, 4, 5, 6, 7, 8, 9, 10, 11, 12, 13, 14, 15, 16, 17, 18, 19, 20, 21)
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Specification