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PANEL GLASS FOR CATHODE RAY TUBE CONTAINING SrO/(SrO+BaO) WITH WEIGHT RATIO 0.35 TO 0.70 AND X-RAY ABSORPTION COEFFICIENT 36.0cm¬-1 OR HIGHER
PANEL GLASS FOR CATHODE RAY TUBE CONTAINING SrO/(SrO+BaO) WITH WEIGHT RATIO 0.35 TO 0.70 AND X-RAY ABSORPTION COEFFICIENT 36.0cm¬-1 OR HIGHER
PURPOSE: A panel glass is provided to prevent a browning phenomenon and devitrification stones during molding even in cases where the panel glass contains a large amount of SrO or BaO. CONSTITUTION: A panel glass contains SiO2 45% to 60% by weight, Al2O3 0 to 1.2% by weight, MgO 0 to 3% by weight, CaO 0 to 3% by weight, SrO 7 to 15% by weight, BaO 6 to 14.5% by weight, ZnO 5 to 10% by weight, Na2O 0.01 to 4% by weight, K2O 6 to 15% by weight, Li2O 0.01 to 4% by weight, ZrO2 0 to 1.5% by weight, TiO2 0 to 3% by weight, CeO2 0 to 3% by weight, and Sb2O3 0 to 2% by weight. The weight ratio of SrO/(SrO+BaO) is 0.35 to 0.70, and the panel glass contains substantially no PbO. The mole ratio of Na2O/R2O, K2O/R2O and Li2O falls within the range surrounded by point(0,0.2,0,8), point(0.2, 0.2, 0.6), point(0.4, 0.6, 0), point(0.2, 0.8, 0) and point(0, 0.4, 0.6).
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机译：目的：提供一种平板玻璃，即使在平板玻璃中含有大量SrO或BaO的情况下，也可以防止成型期间的褐变现象和失透性结石。组成：平板玻璃包含45％至60％（重量）的SiO2、0至1.2％（重量）的Al2O3、0至3％（重量）的MgO，0至3％（重量）的CaO，7至15％（重量）的SrO，BaO至6％（重量） 14.5％（重量），ZnO（5-10％），Na2O（0.01-4％），K2O（6-15％），Li2O（0.01-4％），ZrO2（0-1.5％），TiO2（0-3％） CeO 2为0至3重量％，Sb 2 O 3为0至2重量％。 SrO /（SrO + BaO）的重量比为0.35至0.70，并且平板玻璃基本上不包含PbO。 Na 2 O / R 2 O，K 2 O / R 2 O和Li 2 O的摩尔比在由点（0,0.2,0,8），点（0.2、0.2、0.6），点（0.4、0.6、0），点（ 0.2、0.8、0）和点（0、0.4、0.6）。
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