US 5,627,115 A · Colored borosilicate glass

Abstract

The invention relates to brownish, brown to black colored borosilicate glasses which have stepped grades of transmission in the NIR range or are fully non-transmitting. The borosilicate glass, primarily the borosilicate glass 3.3, is melted with defined additives of titanium carbide and/or metallic silicon. The glasses produced in accordance with the invention are to be used as filters, glass vessels and/or decorative colored glass in construction and for decorating because of their absorption/transmission characteristics. On the other hand, the glasses produced in accordance with the invention can also be used as absorbers in solar technology when the light transmissibility in the NIR/IR range is sufficiently low.

Claims3

Dependent claims

A colored borosilicate glass composition comprising (in percent by weight on oxide basis) SiO.sub.2 >78;

B.sub.2 O.sub.3 >8;
Al.sub.2 O.sub.3 1.5 to 3.5;
alkali oxides>2, having a transmission in the near infrared radiation (NIR) range with a glass exhibiting a color from brown to black while the NIR transmission is correspondingly reduced to complete non-transparency and further comprising (in percent by weight on oxide basis) 0.5 to 2.0 percent by weight titanium carbide (TIC) and/or 0.05 to 0.5 percent by weight silicon (metallic).

Dependencies are inferred from the claim text.

Colored borosilicate glass

Life of this patent

Colored borosilicate glass

Life of this patent

Abstract

Claims3