GB1027136A - Glass articles - Google Patents
Glass articlesInfo
- Publication number
- GB1027136A GB1027136A GB4918164A GB4918164A GB1027136A GB 1027136 A GB1027136 A GB 1027136A GB 4918164 A GB4918164 A GB 4918164A GB 4918164 A GB4918164 A GB 4918164A GB 1027136 A GB1027136 A GB 1027136A
- Authority
- GB
- United Kingdom
- Prior art keywords
- salt
- glass
- alkali metal
- treatment
- strain point
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Expired
Links
Classifications
-
- C—CHEMISTRY; METALLURGY
- C03—GLASS; MINERAL OR SLAG WOOL
- C03C—CHEMICAL COMPOSITION OF GLASSES, GLAZES OR VITREOUS ENAMELS; SURFACE TREATMENT OF GLASS; SURFACE TREATMENT OF FIBRES OR FILAMENTS MADE FROM GLASS, MINERALS OR SLAGS; JOINING GLASS TO GLASS OR OTHER MATERIALS
- C03C21/00—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface
- C03C21/001—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions
- C03C21/002—Treatment of glass, not in the form of fibres or filaments, by diffusing ions or metals in the surface in liquid phase, e.g. molten salts, solutions to perform ion-exchange between alkali ions
Abstract
Alkali metal silicate glass is strengthened by contacting it at a temperature below the strain point with the salt of an alkali metal having a larger atomic diameter than an alkali metal in the glass and maintaining the hydroxyl content of the salt below 0.0015%, and preferably below 0.001% by weight. The control of the alkalinity is effected by periodically bubbling an acid gas such as sulphur dioxide or nitrogen dioxide through the molten salt. The glass is a soda-lime-silica glass and the salt may be a potassium salt, preferably the nitrate; rubidium or caesium salts can be used instead of or subsequently to potassium salts. The temperature of treatment is at least 870 DEG F. and preferably between 875 DEG F. and 10 DEG F. below the strain point, and the treatment is carried on for 5-40 minutes.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US32806063A | 1963-12-04 | 1963-12-04 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1027136A true GB1027136A (en) | 1966-04-27 |
Family
ID=23279344
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB4918164A Expired GB1027136A (en) | 1963-12-04 | 1964-12-03 | Glass articles |
Country Status (4)
| Country | Link |
|---|---|
| BE (1) | BE656592A (en) |
| DE (1) | DE1496637B2 (en) |
| GB (1) | GB1027136A (en) |
| NL (1) | NL6411555A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10442723B2 (en) | 2014-12-23 | 2019-10-15 | Schott Ag | Borosilicate glass with low brittleness and high intrinsic strength, the production thereof, and the use thereof |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3524738A (en) * | 1965-12-07 | 1970-08-18 | Owens Illinois Inc | Surface stressed mineral formed glass and method |
-
1964
- 1964-10-05 NL NL6411555A patent/NL6411555A/xx unknown
- 1964-10-29 DE DE19641496637 patent/DE1496637B2/en active Pending
- 1964-12-03 BE BE656592D patent/BE656592A/xx unknown
- 1964-12-03 GB GB4918164A patent/GB1027136A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US10442723B2 (en) | 2014-12-23 | 2019-10-15 | Schott Ag | Borosilicate glass with low brittleness and high intrinsic strength, the production thereof, and the use thereof |
Also Published As
| Publication number | Publication date |
|---|---|
| DE1496637A1 (en) | 1969-03-27 |
| DE1496637B2 (en) | 1970-08-13 |
| NL6411555A (en) | 1965-06-07 |
| BE656592A (en) | 1965-06-03 |
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