Palely colored glass having high transmittance and method for producing the same
AssigneeNippon Sheet Glass Co., Ltd.
InventorYukihito Nagashima
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Abstract
The present invention provides a light-colored high-transmittance glass sheet including, as coloring components, in weight percent, less than 0.06% total iron oxide in terms of Fe2O3 (T—Fe2O3); 0.5 to 5 ppm CoO; and 0 to 0.45% cerium oxide; wherein the ratio of FeO in terms of Fe2O3 to T—Fe2O3 is less than 40%; and wherein the glass sheet has a dominant wavelength of 470 to 495 nm when measured at a glass sheet thickness of 10 mm. The present invention also provides a light-colored high-transmittance glass sheet of light neutral gray or bronze tint with a dominant wavelength of 560 to 585 nm.
Claims28
A light-colored high-transmittance glass sheet containing silica as a main component, wherein
- the glass sheet comprises the following coloring components, in weight percent:
- less than 0.06% T-Fe2O3, wherein T-Fe2O3 is total iron oxide in terms of Fe2O3;
- 1.75 to 5 ppm CoO;
- and
- 0 to 0.45% cerium oxide;
- wherein the ratio of FeO in terms of Fe2O3 to T-Fe2O3 is less than 40%;
- and
- wherein the glass sheet has a dominant wavelength of 470 to 495 nm when measured with the CIE Standard illuminant C at a glass sheet thickness of 10 mm.
A light-colored high-transmittance glass sheet containing silica as a main component, wherein
- the glass sheet comprises the following coloring components, in weight percent:
- at least 0.02% and less than 0.06% T-Fe2O3, wherein T-Fe2O3 is total iron oxide in terms of Fe2O3;
- 0.25 to 3 ppm Se;
- 0 to 3 ppm CoO;
- and
- 0 to 0.45% cerium oxide;
- wherein the ratio of FeO in terms of Fe2O3 to T-Fe2O3 is less than 40%;
- wherein the glass sheet further comprises, in weight percent, more than 2% MgO;
- and
- wherein the glass sheet has a dominant wavelength of 560 to 585 nm when measured with the CIE Standard illuminant C at a glass sheet thickness of 10 mm.
Dependencies are inferred from the claim text.