CHEMICALLY TOUGHENED GLASS ARTICLE WITH LOW COEFFICIENT OF THERMAL EXPANSION
    3.
    发明申请
    CHEMICALLY TOUGHENED GLASS ARTICLE WITH LOW COEFFICIENT OF THERMAL EXPANSION 审中-公开
    具有低热膨胀系数的化学玻璃制品

    公开(公告)号:WO2015127583A1

    公开(公告)日:2015-09-03

    申请号:PCT/CN2014/072494

    申请日:2014-02-25

    CPC classification number: C03C21/002 C03C3/091 C03C3/093 C03C3/095

    Abstract: The invention provides a lithium-free boron alumino-silicate glass composition which is chemically toughened and a glass article manufactured thereof. The glass article has a CTE lower than 7.5 ppm/K -1 at a temperature of 20 to 300°C, a Dol higher than 10 μm and a CS higher than 500 MPa. The glass article comprises a glass composition in accordance to the invention with the ratio R'O/R2O equal to or lower than 0.7 and wherein R' is at least one of Mg, Ca, Sr, Ba and wherein R is at least 10 one of Na and K. The non-bridge oxygen produced by alkali earth oxides can be controlled and the good chemical toughening properties (CS>500 MPa, Dol>10 μm) can be got. The glass has high thermal 15 shock resistance, high heat conductive coefficient and high surface tension. The chemical toughening low CTE glass article can be used as a cover for cellphones, smart phones, tablet PC, notebooks, PDA;20 or it can be used for flexible cover on folding screening display, OLED and the like.

    Abstract translation: 本发明提供一种化学增韧的无锂硼铝硅酸盐玻璃组合物及其制造的玻璃制品。 玻璃制品在20-300℃的温度下的CTE低于7.5ppm / K-1,Dol高于10μm,CS高于500MPa。 玻璃制品包含根据本发明的玻璃组合物,其比率R'O / R2O等于或低于0.7,其中R'是Mg,Ca,Sr,Ba中的至少一种,并且其中R是至少10个 的Na和K.可以控制由碱土氧化物产生的非桥氧,并且可以获得良好的化学增韧性能(CS> 500MPa,Dol>10μm)。 该玻璃具有高耐热15抗冲击性,高导热系数和高表面张力。 化学增韧低CTE玻璃制品可用作手机,智能手机,平板电脑,笔记本电脑,PDA等的盖子; 20可用于折叠屏幕显示屏,OLED等上的柔性封面。

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