Scratch and damage resistant laminated glass articles

    公开(公告)号:US11548266B2

    公开(公告)日:2023-01-10

    申请号:US16824101

    申请日:2020-03-19

    Abstract: Scratch and damage resistant laminated glass articles are disclosed. According to one aspect, a laminated glass article may include a glass core layer formed from an ion exchangeable core glass composition and includes a core glass elastic modulus EC and at least one glass clad layer fused directly to the glass core layer. The at least one glass clad layer may be formed from an ion exchangeable clad glass composition different than the ion exchangeable core glass composition and includes a clad glass elastic modulus ECL. The laminated glass article may have a total thickness T and the at least one glass clad layer may have a thickness TCL that is less than 30% of the total thickness T. EC may be at least 5% greater than ECL.

    GLASS LAMINATE ARTICLES
    72.
    发明申请

    公开(公告)号:US20220396522A1

    公开(公告)日:2022-12-15

    申请号:US17838335

    申请日:2022-06-13

    Abstract: A method of manufacturing a strengthened glass article includes forming a glass-to-glass laminate by fusing clad and core glasses, where the clad has greater high-temperature coefficient of thermal expansion (HTCTE) than the core but a lesser low-temperature coefficient of thermal expansion (LTCTE). The method includes cooling the laminate to impart stresses through contraction mismatch between the clad and core, where stresses in the laminate from HTCTE differences at least partially offset stresses in the laminate from LTCTE. After the cooling, the method includes modifying geometry of the laminate, then relaxing at least some of the stresses in the glass-to-glass laminate from differences in the HTCTE.

    THERMAL HISTORY-INSENSITIVE ALKALI-FREE GLASSES

    公开(公告)号:US20220340476A1

    公开(公告)日:2022-10-27

    申请号:US17620809

    申请日:2020-06-10

    Abstract: An alkali-free glass including greater than or equal to 65.0 mol % SiO2, mol % RO/mol % Al2O3 less than 0.7 (where RO can include divalent oxides MgO, CaO, SrO, BaO, or combinations thereof), RO less than or equal to 14 mol %, and the absolute value of a slope dE/dTf of a line extending between a first endpoint and a second endpoint less than or equal to 10.0221 GPa/° C. The first endpoint is a Young's modulus at a fictive temperature of the annealing point temperature and the second endpoint is a Young's modulus at a fictive temperature of the strain point temperature, and the slope is a change in Young's modulus (GPa) per 1° C. change in fictive temperature. RO is a total amount of alkali earth metal oxides. A glass article is also disclosed.

    Glass with high surface strength
    80.
    发明授权

    公开(公告)号:US11104602B2

    公开(公告)日:2021-08-31

    申请号:US15191961

    申请日:2016-06-24

    Abstract: Embodiments of alkali aluminosilicate glass articles that may be chemically strengthened to achieve a maximum surface compressive stress that exceeds compressive stresses that have been achieved in similar glasses are disclosed. In one or more embodiments, the fictive temperature of these glass articles may be equal to the 1011 poise (P) viscosity temperature of the glass article. In some embodiments, the strengthened alkali aluminosilicate glass articles described herein may exhibit a maximum compressive stress of at least about 400 MPa, 800 MPa, 930 MPa or 1050 MPa. In some embodiments, the strengthened alkali aluminosilicate glass articles described herein may exhibit a compressive stress layer extending to a depth of layer of at least about 40 μm (in samples having a thickness of 1 mm). In still other embodiments, these strengthened alkali aluminosilicate glass articles exhibit a parabolic or near-parabolic tensile stress profile in the central region of the glass articles.

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