Glass for chemical strengthening, chemically strengthened glass and method for manufacturing chemically strengthened glass
US11535548B2 · kind B2 · utility
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20Claims
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Key dates
| Filing date | Apr 17, 2019 |
| Grant date | Dec 27, 2022 |
| Priority date | — |
| Expiry date | Jun 6, 2041 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03B23/0357
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A glass for chemical strengthening has a Young's modulus E of 70 GPa or more. The glass satisfies X1+X2+X3 being 1760 or less. Here, X1 is a numerical value equivalent to a value [unit: kPa/° C.] obtained by multiplying the Young's modulus E by an average coefficient α of thermal expansion at 50° C. to 350° C., X2 is a numeral value equivalent to a value of a temperature Tf [unit: ° C.] at which a viscosity of the glass reaches 100 MPa·s, and X3 is a numerical value equivalent to a value of a difference [unit: 105 Pa·s] between the viscosity (100 MPa·s) at the Tf and a viscosity η+10 at a temperature 10° C. higher than the Tf.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.