| 摘要 |
PROBLEM TO BE SOLVED: To obtain a composition for clearly and uniformly coloring produced glass in red, by making the composition include raw materials of silica sand, soda ash, limestone, Glauber's salt, copper oxide, carbon, tin oxide and zinc oxide in a specific ratio. SOLUTION: This composition for producing a copper red glass comprises raw materials composed of 100 pts.wt. of silica sand, 26-36 pts.wt. of soda ash, 23-33 pts.wt. of limestone, 0.8-1.2 pts.wt. of Glauber's salt, 0.06-0.12 pt.wt. of copper oxide, 0.21-0.28 pt.wt. of carbon, 1.6-2.5 pts.wt. of tin oxide and 0.5-7.0 pts.wt. of zinc oxide. Then the composition is melted at a temp. of 1,200-1,500 deg.C for 1-24 hours, molded, retained and heat-treated at 520-580 deg.C higher than the glass transition point for 5-10 minutes, then annealed to give the objective cooper red glass having a color tone of about 595-620 nm main wavelength (λd) calculated as 4 mm thickness, about 5-35% brightness (Y) and about 40-100% excitation purity (Pe), is colored in red and has a few defects such as foam.
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