Patent Number: 7,820,575

Title: Near infrared absorbent green glass composition, and laminated glass using the same

Abstract: The present invention provides a near-infrared absorbent green glass composition which contains basic glass components and 0.6 to 1.3% total iron oxide amount in terms of Fe.sub.2O.sub.3 (T-Fe.sub.2O.sub.3), 0 to 2.0% CeO.sub.2 and, 300 ppm or less MnO expressed in units of mass and wherein a mass ratio (FeO ratio) of FeO converted into Fe.sub.2O.sub.3 relative to the T-Fe.sub.2O.sub.3 is from 0.21 to 0.35. Further the glass composition satisfies at least one of the following a) and b): a) when the glass composition is formed to have a thickness in the range of 1.3 to 2.4 mm, a visible light transmittance is at least 80%, a total solar energy transmittance is 62% or less, a dominant wavelength is from 500 to 540 nm, and an integrated value obtained by integrating transmittance of every 1 nm in the wavelength from 1100 to 2200 nm is 62000 or less; b) when the glass composition is formed to have a thickness in the range of 3 to 5 mm, a visible light transmittance is at least 70%, a total solar energy transmittance is 45% or less, a dominant wavelength is from 495 to 540 nm, and an integrated value obtained as above is 62000 or less.

Inventors: Nagashima; Yukihito (Tokyo, JP), Seto; Hiromitsu (Tokyo, JP), Murakami; Harunori (Tokyo, JP), Tanaka; Hiroyuki (Tokyo, JP)

Assignee: Nippon Sheet Glass Company, Limited

International Classification: C03C 3/095 (20060101); B32B 17/10 (20060101); C03C 3/087 (20060101)

Expiration Date: 2018-10-26 0:00:00