Chemically strengthened glass for display devices
A technology for strengthening glass and display devices, which is applied in transportation, packaging, thin material handling, etc., to achieve the effects of less light leakage, high transparency, excellent appearance and practicality
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[0147] The following glass plates are prepared by slowly cooling molten glass to room temperature, followed by cutting, chipping, double-sided mirror grinding, etc.:
[0148] Composition expressed in mol% for SiO 2 : 64.5%, Al 2 o 3 : 6.0%, Na 2 O: 12.0%, K 2 O: 4.0%, MgO: 11.0%, CaO: 0.1%, SrO: 0.1%, ZrO 2 : In 100 parts by mass of matrix glass at 2.5%, Fe is contained in the ratio shown in parts by mass in the corresponding column of Table 1 2 o 3 , NiO, CoO Examples 1, 3-5, 7, 10, 16, 17, 20-22, 28 glass plates (thickness 4mm, 0.7mm, etc., size 50mm×50mm, etc.).
[0149] It should be noted that, in Table 1, the numerical values expressed in parts by mass per 100 parts by mass of the matrix glass are equal to the numerical values expressed in % by mass. For example the Fe of Example 1 2 o 3 It is 0.20% by mass. In addition, SnO 2 , Sb 2 o 3 The contents are all below the detection limit, less than 0.01% by mass.
[0150] Then, a glass plate with a thickness...
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