Method of glass strengthening by ion exchange
US4218230A · kind A · utility
39Cited by
11References
5Claims
0Family size
Assignee
Inventor
Key dates
| Filing date | Aug 4, 1978 |
| Grant date | Aug 19, 1980 |
| Priority date | — |
| Expiry date | Aug 4, 1998 |
Classification
- Technology area (CPC C)Chemistry; Metallurgy
- CPC primaryC03C21/002
- WIPO fieldMaterials, metallurgy
- WIPO sectorChemistry
Abstract
A method for strengthening a sodium lime silicate type glass body by substituting potassium ions for sodium ions in a surface layer of glass by spraying an aqueous solution of potassium ions and from 1 to 6 weight percent of sodium ions upon the glass at a temperature of from about 200.degree. C. to just below the annealing point of the glass.
Source: USPTO / EPO open patent data. Objective bibliographic and citation counts.