GB1089202A - Improvements in or relating to glass-ceramics - Google Patents
Improvements in or relating to glass-ceramicsInfo
- Publication number
- GB1089202A GB1089202A GB2579363A GB2579363A GB1089202A GB 1089202 A GB1089202 A GB 1089202A GB 2579363 A GB2579363 A GB 2579363A GB 2579363 A GB2579363 A GB 2579363A GB 1089202 A GB1089202 A GB 1089202A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- point
- held
- stage process
- vii
- 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
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/0036—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition containing SiO2, Al2O3 and a divalent metal oxide as main constituents
-
- 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
- C03C10/00—Devitrified glass ceramics, i.e. glass ceramics having a crystalline phase dispersed in a glassy phase and constituting at least 50% by weight of the total composition
- C03C10/16—Halogen containing crystalline phase
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Ceramic Engineering (AREA)
- Crystallography & Structural Chemistry (AREA)
- Dispersion Chemistry (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical Kinetics & Catalysis (AREA)
- General Chemical & Material Sciences (AREA)
- Geochemistry & Mineralogy (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
A glass-ceramic article is made by forming the article in glass including essentially in per cent by weight: SiO2, 40.0-70.0; CaO, 7.5-37.5; Na2O, 4.0-14.0; Al2O3, 1.0-10.0; P2O5, 0.5-12.5; F2, 0.1-2.5, the balance, if any, consisting of other compatible constituents. The glass may also include: B2O3, 0-2%; and MgO, SrO, BaO, ZnO, CdO and/or PbO totalling 0-3.0%. Usual impurities may be present, as may refining agents, e.g. cerium oxide. The article is then subjected to a heat-treatment including a step in which it is heated at \sO 10 DEG C/min. to 150 DEG -250 DEG C. above the dilatometric softening point, (Mg point), and is held in this temperature range until a major proportion of the glass is devitrified. The heat-treatment may be a one, two, or three stage process: in the three-stage process the temperature is (i) raised between 150 DEG C. below and 50 DEG C. above the Mg point; (ii) held; (iii) raised to not more than 150 DEG C. above the Mg point; (iv) held; (v) raised to 150-250 DEG C. above the Mg point; (vi) held; (vii) reduced to room temperature. In all the temperature-change steps, the rate is \sO 10 DEG C/min. In the two-stage process, only steps (iii)-(vii) are performed, and in the single-stage process, only steps (v)-(vii) are performed.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2579363A GB1089202A (en) | 1963-06-28 | 1963-06-28 | Improvements in or relating to glass-ceramics |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2579363A GB1089202A (en) | 1963-06-28 | 1963-06-28 | Improvements in or relating to glass-ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1089202A true GB1089202A (en) | 1967-11-01 |
Family
ID=10233402
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2579363A Expired GB1089202A (en) | 1963-06-28 | 1963-06-28 | Improvements in or relating to glass-ceramics |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1089202A (en) |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4386162A (en) * | 1981-10-05 | 1983-05-31 | Corning Glass Works | Alkali metal, calcium fluorosilicate glass-ceramic articles |
| US4397670A (en) * | 1981-10-05 | 1983-08-09 | Corning Glass Works | Method of making alkali metal, calcium fluorosilicate glass-ceramic articles |
| FR2535708A1 (en) * | 1982-07-30 | 1984-05-11 | Mo Khim T | Vitreous crystalline material and process for the manufacture of this material. |
| US11236012B2 (en) | 2018-03-28 | 2022-02-01 | Corning Incorporated | Boron phosphate glass-ceramics with low dielectric loss |
| CN114230183A (en) * | 2021-12-24 | 2022-03-25 | 晋城市光机电产业协调服务中心(晋城市光机电产业研究院) | Ceramic glass, curved surface ceramic glass and preparation method thereof |
-
1963
- 1963-06-28 GB GB2579363A patent/GB1089202A/en not_active Expired
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4386162A (en) * | 1981-10-05 | 1983-05-31 | Corning Glass Works | Alkali metal, calcium fluorosilicate glass-ceramic articles |
| US4397670A (en) * | 1981-10-05 | 1983-08-09 | Corning Glass Works | Method of making alkali metal, calcium fluorosilicate glass-ceramic articles |
| FR2535708A1 (en) * | 1982-07-30 | 1984-05-11 | Mo Khim T | Vitreous crystalline material and process for the manufacture of this material. |
| US11236012B2 (en) | 2018-03-28 | 2022-02-01 | Corning Incorporated | Boron phosphate glass-ceramics with low dielectric loss |
| CN114230183A (en) * | 2021-12-24 | 2022-03-25 | 晋城市光机电产业协调服务中心(晋城市光机电产业研究院) | Ceramic glass, curved surface ceramic glass and preparation method thereof |
| CN114230183B (en) * | 2021-12-24 | 2024-01-12 | 晋城市光机电产业协调服务中心(晋城市光机电产业研究院) | Ceramic glass, curved ceramic glass and preparation method thereof |
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