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    • 14. 发明授权
    • Alkaline earth alumino-borosilicate crack resistant glass
    • 碱土铝硼硅酸盐抗裂玻璃
    • US08796165B2
    • 2014-08-05
    • US13291533
    • 2011-11-08
    • Adam James EllisonTimothy Michael Gross
    • Adam James EllisonTimothy Michael Gross
    • C03C3/091C03C3/093
    • C03C3/091
    • The present disclosure relates to glass articles for use as a touchscreen substrate or cover glass article for use in a portable electronic device, particularly an aluminoborosilicate glass being substantially free of alkalis, comprising at least 55 mol % SiO2, at least 5 mol % Al2O3 and at least one alkaline earth RO component. The alkali-free aluminoborosilicate exhibits an Al2O3+B2O3 to RO mol % ratio which exceeds 1 and an Al2O3 to RO mol % ratio which exceeds 0.65. The aluminoborosilicate glasses disclosed herein exhibits high damage resistance as evidenced by a Vickers median/radial crack initiation load which is greater than than 1000 gf, as well as a high scratch resistance of at least 900 gf, as measured by the lack of the presence of lateral cracks when a load is applied by a moving Knoop indenter.
    • 本公开涉及用作便携式电子设备中使用的触摸屏基板或盖玻璃制品的玻璃制品,特别是基本上不含碱的铝硼硅酸盐玻璃,其包含至少55摩尔%的SiO 2,至少5摩尔%的Al 2 O 3和 至少一种碱土金属RO组分。 无碱铝硼硅酸盐的Al 2 O 3 + B 2 O 3与RO摩尔%比超过1,Al 2 O 3与RO摩尔%比超过0.65。 本文公开的铝硼硅酸盐玻璃表现出高的耐损伤性,如通过维氏中值/径向裂纹起始载荷大于1000gf以及高至少900gf的高耐刮擦性所证明的,如通过不存在 通过运动的Knoop压头施加负载时的横向裂纹。