Libbey-owens-ford Co.

J Joseph Cheng

Paige L Higby

Bret E Penrod

Rodney G Baker

Richard R Snow

Brian M Kolkowski

Geoffrey Evans

Charles R Bamford

Harold B Milnes

A neutral, generally green colored, infrared energy and ultraviolet radiation absorbing glass composition comprises conventional soda-lime-silica float glass ingredients, a relatively high concentration of moderately reduced iron, and titanium oxide(s). The resultant glass exhibits an Illuminant A visible light transmittance of at least 70%, a total solar energy transmittance not greater than about 46%, and an ultraviolet radiation transmittance not greater than approximately 38%, at selected glass thicknesses in the range of 3 mm to 5 mm. The titanium oxide(s) as well as at least a portion of the iron in the glass is provided by the inclusion of the mineral ilmenite in the glass batch formulation.

Glass production method using ilmenite

A neutral, gray colored, nickel having a medium visible light transmittance between about 30 and percent, and low total solar energy and ultraviolet radiation transmittance, is produced with colorants comprising 0.40 to 0.58 percent by weight total iron expressed as Fe.sub.2 O.sub.3 (22 to 26 percent reduced to FeO), 0.006 to 0.018 Co.sub.3 O.sub.4, and 0.0006 to 0.0015 percent Se. The glass product having such a composition is particularly suitable for architectural applications.

Neutral gray glass composition

An infrared energy and ultraviolet radiation absorbing green-colored high total iron containing soda-lime-silica glass batch includes typical soda-lime-silica glass batch ingredients, an ultraviolet radiation absorbing quantity of a cerium containing compound, a high amount of total iron, and a surprisingly small amount of carbon which eliminates silica scum formation in the melt and silica inclusion faults in the finished glass.

Batch composition for making infrared and ultraviolet radiation

Green-colored, infrared energy and ultraviolet radiation absorbing glass compositions comprise conventional soda-lime-silica float glass ingredients, a high concentration of moderately reduced iron, and ceric oxide. The resultant glass exhibits an Illuminant A visible light transmittance greater than 70%, a total solar energy transmittance less than about 46%, and an ultraviolet radiation transmittance less than about 38%, at glass thicknesses in the range of 3 mm to 5 mm. Optionally, a portion of the ceric oxide can be replaced with a predetermined quantity of titanium oxide.

Infrared and ultraviolet radiation absorbing green glass composition

Blue-colored, infrared radiation absorbing glass compositions are prepared by the addition of zinc sulfide and zinc oxide to glass compositions containing iron. The zinc sulfide acts as a reducing agent, to maintain a portion of the iron in the ferrous state, and the zinc oxide prevents amber coloration of the glass which would otherwise occur due to the addition of the zinc sulfide to the glass batch.

Growing community of inventors

Perrysburg, OH, United States of America

J Joseph Cheng