Invention Grant
- Patent Title: Glass for chemical strengthening and chemical strengthened glass, and manufacturing method of glass for chemical strengthening
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Application No.: US14634122Application Date: 2015-02-27
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Publication No.: US09963378B2Publication Date: 2018-05-08
- Inventor: Hiroyuki Yamamoto
- Applicant: Asahi Glass Company, Limited
- Applicant Address: JP Tokyo
- Assignee: ASAHI GLASS COMPANY, LIMITED
- Current Assignee: ASAHI GLASS COMPANY, LIMITED
- Current Assignee Address: JP Tokyo
- Agency: Oblon, McClelland, Maier & Neustadt, L.L.P.
- Priority: JP2012-203596 20120914
- Main IPC: C03C3/087
- IPC: C03C3/087 ; C03C4/08 ; C03C3/085 ; C03C3/091 ; C03C3/095 ; C03C4/02 ; C03C21/00 ; C03C3/093 ; C03C4/18 ; C03C4/16

Abstract:
There is provided a glass for chemical strengthening having a black color tone and excelling in characteristics preferred for the purposes of housing or decoration of an electronic device, that is, defoaming quality, strength, and light transmittance characteristics. A glass for chemical strengthening contains, in mole percentage based on following oxides, 55% to 80% of SiO2, 0.25% to 16% of Al2O3, 0% to 12% of B2O3, 5% to 20% of Na2O, 0% to 15% of K2O, 0% to 15% of MgO, 0% to 15% of CaO, 0% to 25% of ΣRO (where R represents Mg, Ca, Sr, Ba, or Zn), and 0.1% to 7% of a coloring component (at least one metal oxide selected from the group consisting of oxides of Co, Mn, Fe, Ni, Cu, Cr, V, and Bi).
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