HEAT-ABSORBING GLASS PLATE AND METHOD FOR MANUFACTURING SAME

摘要

To provide a heat-absorbing glass plate having a low visible light transmittance, a solar transmittance sufficiently lower than the visible light transmittance, and a low excitation purity, and a process for its production.;A heat-absorbing glass plate containing iron, tin, selenium, cobalt and sulfur, wherein
the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 55%,the ratio Tv/Te of the visible light transmittance Tv (by illuminant A, 2° visual field) as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate to the solar transmittance Te as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, is at least 1.5,the visible light transmittance Tv (by illuminant A, 2° visual field) is at most 65% as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, andthe excitation purity Pe is at most 7% as defined in JIS Z8701 (1999) calculated as 4 mm thickness of the glass plate.

主权项

1. A heat-absorbing glass plate containing iron, tin, selenium, cobalt and sulfur, wherein
the mass ratio of divalent iron as calculated as Fe2O3 to total iron as calculated as Fe2O3 is at least 55%, the ratio Tv/Te of the visible light transmittance Tv (by illuminant A, 2° visual field) as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate to the solar transmittance Te as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, is at least 1.5, the visible light transmittance Tv (by illuminant A, 2° visual field) is at most 65% as defined in JIS R3106 (1998) calculated as 4 mm thickness of the glass plate, and the excitation purity Pe is at most 7% as defined in JIS Z8701 (1999) calculated as 4 mm thickness of the glass plate.