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Thermally strengthened architectural glass and related systems and methods

  • US 10,611,664 B2
  • Filed: 07/28/2016
  • Issued: 04/07/2020
  • Est. Priority Date: 07/31/2014
  • Status: Active Grant
First Claim
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1. A window comprising:

  • a first glass-based layer comprising first and second major surfaces, a first body formed from a first glass material, and a first outer edge;

    a second glass-based layer comprising first and second major surfaces, a second body formed from a second glass material, and a second outer edge;

    the second glass-based layer spaced apart from and disposed substantially parallel to the first glass-based layer by a first distance;

    the first and second major surfaces of the second glass-based layer separated by the thickness t, the first major surface of the second glass-based layer being flat to 100 μ

    m total indicator run-out (TIR) along any 50 mm or less profile of the first major surface;

    the second glass material having a low temperature linear CTE, expressed in 1/°

    C., of α

    SCTE, a high temperature linear CTE, expressed in 1/°

    C., of α

    LCTE, an elastic modulus, expressed in GPa, of E, a strain temperature, expressed in units of °

    C., of Tstrain, and a softening temperature, expressed in units of °

    C., of Tsoft;

    the first major surface of the second glass-based layer having a thermally induced surface compressive stress of less than 600 MPa and greater than

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