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Invention Publication
CN105189385A 化学强化用玻璃板及其制造方法 无效 - 撤回

化学强化用玻璃板及其制造方法
Abstract:
本发明提供一种具有高玻璃化转变温度、在低温(150～300℃)下的热处理中压缩度(C)小的玻璃板。本发明涉及一种化学强化用玻璃板，其假想粘度设定为1012.8d·Pa·s以下，且以氧化物基准的摩尔百分率表示，含有：60～79％的SiO2、2.5～18％的Al2O3、0～3％的B2O3、1～15％的MgO、0～1％的CaO、0～1％的SrO、0～1％的BaO、0～1％的ZrO2、7～15.5％的Na2O、0～0.5％的K2O、0～2％的Li2O，其中Na2O+K2O为7～15.5％，Na2O/(Na2O+K2O)为0.9～1，MgO+CaO+SrO+BaO为1～18％，MgO-0.5Al2O3为1～8，MgO+0.5Al2O3为1～20，玻璃化转变温度为580～720℃，压缩度(C)为20ppm以下。
Abstract(English):

The present invention provides a glass plate which has a high glass transition temperature and shows small compaction (C) in a heat treatment at a low temperature (150 to 300 degrees centigrade). The present invention relates to a glass plate for chemical reinforcement purposes, which has a virtual viscosity of 1012.8 d.Pa.s or less and contains, in molar percentage in terms of oxide content, 60 to 79% of SiO2, 2.5 to 18% of Al2O3, 0 to 3% of B2O3, 1 to 15% of MgO, 0 to 1% of CaO, 0 to 1% of SrO, 0 to 1% of BaO, 0 to 1% of ZrO2, 7 to 15.5% of Na2O, 0 to 0.5% of K2O and 0 to 2% of Li2O, wherein Na2O+K2O is 7 to 15.5%, Na2O/(Na2O+K2O) is 0.9 to 1, MgO+CaO+SrO+BaO is 1 to 18%, MgO-0.5Al2O3 is 1 to 8, MgO+0.5Al2O3 is 1 to 20, the glass transition temperature of the glass plate is 580 to 720 degrees centigrade, and the compaction (C) of the glass plate is 20 ppm or less.

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