| 摘要 |
PROBLEM TO BE SOLVED: To enhance ability to absorb UV and heat by forming a colored film on a glass substrate having a specified composition. SOLUTION: A glass substrate containing, by weight, 0.9-2.2% (expressed in terms of Fe2O3) total iron oxide (T-Fe2O3), 0-0.2% NiO and 0-0.03% CoO (NiO+CoO>=0.0010%) is prepared. In the composition, FeO accounts for 10-40% of the total iron oxide. The glass substrate has 35-65% luminous transmittance (Ya), <=50% solar radiation transmittance (Tg), <=1.5% UV transmittance [TuV (ISO)], a transmission chromaticity a* of -15 to -6, a transmission chromaticity b* of -5 to +8, 480-550 nm dominant wavelength(DW) and <=11% color stimulus purity(Pe). The glass substrate is coated with a colored film having 50-300 nm thickness and containing 20-70 mol% (expressed in terms of elements) oxides of Si, Al and B as glass skeleton forming constituent elements and oxides of transition metals as coloring components. The amounts of the oxides are 10-50 mol%, 10-50 mol%, 1.0-20 mol% and 0-20 mol% (expressed in terms of Cu, Mn, Ni and Co), respectively.
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