Glass element with high scratch tolerance
    1.
    发明授权
    Glass element with high scratch tolerance 有权
    具有高耐划痕性的玻璃元件

    公开(公告)号:US09371248B2

    公开(公告)日:2016-06-21

    申请号:US14249825

    申请日:2014-04-10

    Applicant: Schott AG

    CPC classification number: C03C3/093 C03C21/002

    Abstract: A glass element is provided that is made of a glass having SiO2, Al2O3, B2O3, and Na2O. The glass has a scratch tolerance that when scratches of 1 mm length are introduced using a Knoop diamond indenter which presses upon a surface of the glass with a force of 4 Newton and is displaced along the surface with a traverse speed of 0.4 mm/s, not more than 20% of the scratches have a noticeable width including visible chipping of more than 25 μm. In some embodiments, the glass, after chemical tempering, has sodium ions that are at least partially exchanged for potassium ions so that a compressive stress zone is provided at the surface of the glass. The compressive stress is at least 700 MPa and an exchange depth of alkali ions is at least 25 μm.

    Abstract translation: 提供了由具有SiO 2,Al 2 O 3,B 2 O 3和Na 2 O的玻璃制成的玻璃元件。 该玻璃具有划痕公差,当使用Knoop金刚石压头引入1mm长度的划痕时,其以4牛顿的力压在玻璃表面上,并以0.4mm / s的移动速度沿表面移位, 不超过20%的刮痕具有明显的宽度,包括可见的碎裂超过25μm。 在一些实施方案中,玻璃在化学回火之后具有至少部分地与钾离子交换的钠离子,使得在玻璃表面处提供压应力区。 压缩应力为700MPa以上,碱离子的交换深度为25μm以上。

    GLASS ELEMENT WITH HIGH SCRATCH TOLERANCE
    3.
    发明申请
    GLASS ELEMENT WITH HIGH SCRATCH TOLERANCE 有权
    具有高切割宽度的玻璃元件

    公开(公告)号:US20140309097A1

    公开(公告)日:2014-10-16

    申请号:US14249825

    申请日:2014-04-10

    Applicant: Schott AG

    CPC classification number: C03C3/093 C03C21/002

    Abstract: A glass element is provided that is made of a glass having SiO2, Al2O3, B2O3, and Na2O. The glass has a scratch tolerance that when scratches of 1 mm length are introduced using a Knoop diamond indenter which presses upon a surface of the glass with a force of 4 Newton and is displaced along the surface with a traverse speed of 0.4 mm/s, not more than 20% of the scratches have a noticeable width including visible chipping of more than 25 μm. In some embodiments, the glass, after chemical tempering, has sodium ions that are at least partially exchanged for potassium ions so that a compressive stress zone is provided at the surface of the glass. The compressive stress is at least 700 MPa and an exchange depth of alkali ions is at least 25 μm.

    Abstract translation: 提供了由具有SiO 2,Al 2 O 3,B 2 O 3和Na 2 O的玻璃制成的玻璃元件。 该玻璃具有划痕公差,当使用Knoop金刚石压头引入1mm长度的划痕时,其以4牛顿的力压在玻璃表面上,并以0.4mm / s的移动速度沿表面移位, 不超过20%的刮痕具有明显的宽度,包括可见的碎裂超过25μm。 在一些实施方案中,玻璃在化学回火之后具有至少部分地与钾离子交换的钠离子,使得在玻璃表面处提供压应力区。 压缩应力为700MPa以上,碱离子的交换深度为25μm以上。

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