| 摘要 |
To provide a heat-absorbing glass plate which satisfies both low solar transmittance and high visible light transmittance, presents a green color as transmitted light and contains a small number of coloring components. The heat-absorbing glass plate of the present invention has a solar transmittance of at most 42% calculated as 4 mm thickness, has a visible light transmittance (by illuminant A, 2° visual field) of at least 70% calculated as 4 mm thickness, and provides a transmitted light having a dominant wavelength of from 492 to 520 nm, and it is made of soda lime silica glass having substantially the following composition, as represented by mass % based on oxides. SiO2: 65 to 75%, Al2O3: more than 3% and at most 6%, MgO: at least 0% and less than 2%, CaO: 7 to 10%, total iron as calculated as Fe2O3: 0.45 to 0.65%, and TiO2: 0.2 to 0.8%, and contains substantially no member selected from the group consisting of CoO, Cr2O3, V2O5 and MnO, wherein the proportion of the mass of divalent FeO in the mass of total iron which is the amount of total iron as calculated as Fe2O3, is more than 42% and at most 60%. |
