Glass for chemical strengthening and chemical strengthened glass, and manufacturing method of glass for chemical strengthening
AssigneeAsahi Glass Company, Limited
InventorHiroyuki Yamamoto
Life of this patent
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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).
Claims18
A glass for chemical strengthening comprising, in mole percentage based on following oxides,
- 55% to 80% of SiO2,
- 1.1% 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 comprising at least two metal oxides selected from the group consisting of oxides of Co, Mn, Fe, Ni, Cu, Cr, V, and Bi, said coloring component comprising Co3O4 and Fe2O3,
- wherein:
- a content of Fe2O3 is 0.005% or more and less than 1.5%;
- and
- a content ratio of Co3O4/Fe2O3 is 0.01 to 0.5.
The glass for chemical strengthening according to claim comprising 0.05% to 3% of CuO.
Dependencies are inferred from the claim text.