Ppg Industries, Inc.

Ppg Industries Ohio, Inc.

Vitro Flat Glass LLC

Vidrio Plano De Mexico, S.a. De C.v.

David R Haskins

Larry J Shelestak

James W McCamy

Ashtosh P Ganjoo

José Guadalupe Cid-Aguilar

Gary J Nelis

Peter Tausch

Mehran Arbab

Andrew V Wagner

Anthony V Longobardo

Ronald L Schwenninger

John F Krumwiede

Robert B Heithoff

Michael J Buchanan

Leonard A Knavish

Michael Ulizio

Wright M Welton

Richard L Gerutti

DeWitt W Lampman

Dewitt W Lampman

Jose Guadalupe Cid Aguilar

The present invention provides a glass sheet having soda-lime-silica glass composition with a high visible light transmittance (L) of at least 89% with a dominant wavelength (DW) from about 490 to 505 nanometers and purity (Pe) of no more than 1% for control thickness of 5.66 mm and methods of making the same. The glass composition comprising a low iron raw material, a total iron oxide (FeO) of 0.02 to 0.06 wt. %, ferrous (FeO) from 0.006 to 0.02 wt. %, redox (FeO/FeO) from about 0.30 to 0.55, CrOfrom about 0.3 to 10 ppm, TiOfrom about 50 to 500 ppm, SnOfrom about 10 to 500 ppm, and a critical amount from about 0.10 to 0.25 wt. % of SO. The low content of iron oxide is achieved by the partial substitution of regular raw materials by low iron raw materials, with a complete substitution of regular dolomite by a low iron dolomite with a maximum content of 0.020 wt. % FeO.

Soda lime silica glass with high visible light transmittance

The present invention refers to a glass composition and a method for the commercial production of a solar control thin green glass mainly for use in the automotive industry such as symmetric-hybrid windshields or asymmetric-hybrid windshields, sidelights and rear windows, which includes a basic composition of soda-lime-silica glass, and consists essentially, in weight percentage: from 1.30 to 2.50% of total iron expressed as FeO; from 15 to 40% of Fe(Ferrous) and from 0.15 to 0.65% of FeO, expressed as FeO; from about 0.05 to about 0.30% of SO; from about 0.02 to about 1.0% of TiO; from about 0.0002 to about 0.03% of CrO; and from about 0.0002 to about 0.015% of CuO. The solar control thin green glass having an illuminant 'A' light transmission (T) greater than 70%, a direct solar transmittance (T) of less than 51%, a total UV light transmittance (T) of less than 40% and a total solar transmittance (T) of less than 63%; a dominant wavelength (λ) from 490 nm to 600; and excitation purity less than 7, for thickness from about 0.7 to 3.0 mm.

Solar control thin green glass composition

A glass sheet has an electrically conductive film having a sheet resistance in the range of 9.5 to 14.0 ohms/square; an emissivity in the range of 0.14 to 0.17 and an absorption coefficient of greater than 1.5&#xd7;10cmin the wavelength range of 400-1100 nanometers, and a surface roughness of less than 15 nanometers Root Means Square. A glass sheet of another embodiment of the invention has an electrically conductive film having a phosphorous-fluorine doped tin oxide pyrolytically deposited film on the surface of the glass sheet, wherein the ratio of phosphorous precursor to tin precursor is in the range of greater than 0-0.4. The coated glass sheets of the invention can be used in the manufacture of multi sheet insulating units, OLEDs and solar cells.

Coated glasses having a low sheet resistance, a smooth surface, and/or a low thermal emissivity

A solar mirror includes an opaque reflective coating on a surface of a transparent substrate facing away from the sun and a transparent reflective coating on the opposite surface of the substrate. The transparent reflective coating increases the percent reflection of wavelengths in selected ranges, e.g. wavelengths in the infrared range to increase the total solar energy reflected by the solar mirror to increase the solar energy directed to a receiver that converts solar energy to electric and/or thermal energy.

Mirror having reflective coatings on a first surface and an opposite second surface

The present invention provides a glass composition having a neutral gray color and a luminous (visible) transmittance within a range that allows the glass to be used as privacy glazing in a vehicle. The glass of the present invention has a standard soda-lime-silica flat glass base composition and uses iron, cobalt and selenium, and optionally nickel, as the colorants. It has also been found that a nickel-free, neutral gray colored glass with a luminous transmittance (C.I.E. illuminant A) of up to 40% at a thickness of 3.9 millimeters may be attained by using as colorants: 0.59 to 0.99 wt. % of the total glass Fe,O,(total iron), no greater than 0.30 wt. % FeO; 60 to 180 PPM CoO and 5 to 30 PPM Se. It has been found that a nickel-bearing, neutral gray colored glass with a luminous transmittance (C.I.E. illuminant A) of up to but less than 40% at a thickness of 3.9 millimeters may be attained by using as colorants: 0.35 to 1.1 wt. % of the total glass Fe,O,(total iron), no greater than 0.30 wt. % FeO; 60 to 180 PPM CoO; 1 to 30 PPM Se; and 25 to 550 PPM NiO.

Gray glass composition

The present invention provides a blue colored glass using a standard soda-lime-silica glass base composition and additionally iron and cobalt as solar radiation absorbing materials and colorants. In particular, the blue colored glass includes about 0.53 to 1.1 wt. % total iron, preferably about 0.6 to 0.85 wt. % and about 5 to 40 PPM CoO, preferably about 15 to 30 PPM and a luminous transmittance of at least 55%. If desired, the composition may include up to about 100 PPM Cr.sub.2 O.sub.3. The redox ratio for the glass of the present invention is maintained between about 0.25 to 0.35, preferably between about 0.28 to 0.33. The glass color is characterized by a dominant wavelength (DW) of about 485 to 491 nanometers and an excitation purity (Pe) of about 3 to 18 percent. In one particular embodiment of the invention, the color of the glass is characterized by a dominant wavelength in the range of about 487 to 489 nanometers and an excitation purity of about 3 to 8 percent at a thickness of about 0.084 to 0.126 inches, an excitation purity of about 5 to 12 percent at a thickness of about 0.126 to 0.189 inches, and an excitation purity of about 10 to 18 percent at a thickness of about 0.189 to 0.315 inches.

Infrared and ultraviolet radiation absorbing blue glass composition

In a method of vacuum refining molten glass or the like, selenium is provided in the molten glass to serve as a foaming agent, which yields improved refining. Alternatively, colored glass compositions that include selenium as a colorant are refined at higher than normal pressures to retain selenium in the glass without sacrificing refining performance.

Method of vacuum refining of glassy materials with selenium foaming agent

In a method of making glass or the like, wherein the batch materials are liquefied in a distinct zone from the refiner, the liquefied material is heated in an intermediate stage before being fed to the refiner. In preferred embodiments the intermediate stage comprises one or more channels extending from the side of the refiner.

Multi-stage process and apparatus for refining glass or the like

Growing community of inventors

Gibsonia, PA, United States of America

David R Haskins