GB924996A - Improvements in or relating to devitrified glass ceramies and their production - Google Patents
Improvements in or relating to devitrified glass ceramies and their productionInfo
- Publication number
- GB924996A GB924996A GB1768858A GB1768858A GB924996A GB 924996 A GB924996 A GB 924996A GB 1768858 A GB1768858 A GB 1768858A GB 1768858 A GB1768858 A GB 1768858A GB 924996 A GB924996 A GB 924996A
- Authority
- GB
- United Kingdom
- Prior art keywords
- glass
- given
- glasses
- temperature
- hour
- 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
- C03C10/0054—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 PbO, SnO2, B2O3
-
- 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
-
- 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
- C03C10/0009—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 silica as main constituent
-
- 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
- C03C10/0018—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 monovalent metal oxide as main constituents
- C03C10/0027—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 monovalent metal oxide as main constituents containing SiO2, Al2O3, Li2O 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
- C03C10/0036—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
- C03C10/0045—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 containing SiO2, Al2O3 and MgO as main constituents
Abstract
924,996. Ceramic glasses. ENGLISH ELECTRIC CO. Ltd. Sept. 3, 1959 [June 3, 1958; Feb. 26, 1959], Nos. 17688/58 and 6764/59. Drawings to Specification. Class 56. In the manufacture of ceramic glass articles from glass capable of controlled devitrification, glass batch is used containing a phosphate corresponding to 0.5 to 6.0% by weight of phosphorus pentoxide as a nucleating agent and the article is heat treated to devitrify the glass to a predominantly crystalline ceramic glass material. Preferably a metal phosphate is used, of a metal whose oxide forms a major constituent of the glass batch. Major constituents are given as within the following ranges by weight: SiO2 45 to 88 ; Li2O 0 to 27; MgO 0 to 32; Al2O3 0 to 36. Other constituents are given as follows:-Na2O and/or K2O up to 5; ZnO up to 10; SrO, BaO and/or PbO up to 5; CaO up to 10; B2O3 up to 10. For the nucleating agent, orthophosphates of Li, Mg, Al are preferred but orthophosphates of Ca, Zn, Na or K may be used or meta- or pyro-phosphates of the metals. A proportion of the metallic ion, Li or Mg, may be replaced by ammonium or hydrogen ions. Examples of glasses are given. The melted glass batches are shaped as by casting, pressing, drawing or blowing and they may be annealed if required to store before processing. To form the ceramic glass, the articles are heated at 4-5 C. per minute to the softening point and this temperature is maintained for at least one hour to initiate crystallization. In refractory glasses containing Al2O3, the temperature is then raised at 4-5‹ C. per minute to about 40-50‹ C. above the softening temperature and maintained for at least one hour. In all glasses, the heating is then continued at the same rate to the final crystallization temperature and maintained for at least one hour. Final temperatures are given, for certain compositions, from 850‹ to 1200‹ C. Specification 752,243 is referred to.
Priority Applications (10)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL121772D NL121772C (en) | 1958-06-03 | ||
| NL254121D NL254121A (en) | 1958-06-03 | ||
| BE635391D BE635391A (en) | 1958-06-03 | ||
| NL299005D NL299005A (en) | 1958-06-03 | ||
| BE638474D BE638474A (en) | 1958-06-03 | ||
| GB1768858A GB924996A (en) | 1958-06-03 | 1958-06-03 | Improvements in or relating to devitrified glass ceramies and their production |
| FR831500A FR1261570A (en) | 1958-06-03 | 1960-06-29 | Ceramic products and process for their manufacture |
| GB3870162A GB1034344A (en) | 1958-06-03 | 1962-10-12 | Improvements in or relating to glass-ceramics |
| FR950053A FR84444E (en) | 1958-06-03 | 1963-10-09 | Ceramic products and process for their manufacture |
| DE19631496488 DE1496488B2 (en) | 1958-06-03 | 1963-10-11 | PROCESS FOR MANUFACTURING A KIRSTALL GLASS MIXED BODY WITH OPTIMAL STRENGTH THROUGH CONTROLLED DEGLASSING OF A GLASS OF THE SYSTEM LI DEEP 2 0 SI O DEEP 2 USING A PHOSPHATE AS A GROOVER |
Applications Claiming Priority (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1768858A GB924996A (en) | 1958-06-03 | 1958-06-03 | Improvements in or relating to devitrified glass ceramies and their production |
| GB676459 | 1959-06-26 | ||
| GB3870162A GB1034344A (en) | 1958-06-03 | 1962-10-12 | Improvements in or relating to glass-ceramics |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB924996A true GB924996A (en) | 1963-05-01 |
Family
ID=27254889
Family Applications (2)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1768858A Expired GB924996A (en) | 1958-06-03 | 1958-06-03 | Improvements in or relating to devitrified glass ceramies and their production |
| GB3870162A Expired GB1034344A (en) | 1958-06-03 | 1962-10-12 | Improvements in or relating to glass-ceramics |
Family Applications After (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3870162A Expired GB1034344A (en) | 1958-06-03 | 1962-10-12 | Improvements in or relating to glass-ceramics |
Country Status (4)
| Country | Link |
|---|---|
| BE (2) | BE638474A (en) |
| DE (1) | DE1496488B2 (en) |
| GB (2) | GB924996A (en) |
| NL (3) | NL121772C (en) |
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5219799A (en) * | 1991-10-07 | 1993-06-15 | Corning Incorporated | Lithium disilicate-containing glass-ceramics some of which are self-glazing |
| US6455451B1 (en) | 1998-12-11 | 2002-09-24 | Jeneric/Pentron, Inc. | Pressable lithium disilicate glass ceramics |
| US6517623B1 (en) | 1998-12-11 | 2003-02-11 | Jeneric/Pentron, Inc. | Lithium disilicate glass ceramics |
| US6802894B2 (en) | 1998-12-11 | 2004-10-12 | Jeneric/Pentron Incorporated | Lithium disilicate glass-ceramics |
| US7867932B2 (en) | 2007-08-28 | 2011-01-11 | Corning Incorporated | Refractory glass ceramics |
| US9351807B2 (en) | 2011-12-08 | 2016-05-31 | 3M Innovative Properties Company | Lithium silicate glass ceramic material, process of production and use thereof |
| US11236012B2 (en) | 2018-03-28 | 2022-02-01 | Corning Incorporated | Boron phosphate glass-ceramics with low dielectric loss |
Families Citing this family (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3942991A (en) * | 1965-06-21 | 1976-03-09 | Owens-Illinois, Inc. | SiO2 -AlPO4 Glass batch compositions |
| US3458330A (en) * | 1965-06-21 | 1969-07-29 | Owens Illinois Inc | Glass compositions,method and articles |
| EP0729924B1 (en) * | 1993-05-19 | 2000-01-26 | Kabushiki Kaisha Ohara | Glass-ceramic for a magnetic disk substrate |
| JP2516553B2 (en) * | 1993-05-19 | 1996-07-24 | 株式会社オハラ | Crystallized glass for magnetic disk and manufacturing method thereof |
| US5626935A (en) * | 1993-05-19 | 1997-05-06 | Kabushiki Kaisya Ohara | Magnetic disk substrate and method for manufacturing the same |
| KR102297816B1 (en) | 2014-03-20 | 2021-09-07 | 제네럴 일렉트릭 테크놀러지 게엠베하 | An insulation material and a method to produce |
-
0
- NL NL299005D patent/NL299005A/xx unknown
- NL NL254121D patent/NL254121A/xx unknown
- NL NL121772D patent/NL121772C/xx active
- BE BE635391D patent/BE635391A/xx unknown
- BE BE638474D patent/BE638474A/xx unknown
-
1958
- 1958-06-03 GB GB1768858A patent/GB924996A/en not_active Expired
-
1962
- 1962-10-12 GB GB3870162A patent/GB1034344A/en not_active Expired
-
1963
- 1963-10-11 DE DE19631496488 patent/DE1496488B2/en active Pending
Cited By (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US5219799A (en) * | 1991-10-07 | 1993-06-15 | Corning Incorporated | Lithium disilicate-containing glass-ceramics some of which are self-glazing |
| US6455451B1 (en) | 1998-12-11 | 2002-09-24 | Jeneric/Pentron, Inc. | Pressable lithium disilicate glass ceramics |
| US6517623B1 (en) | 1998-12-11 | 2003-02-11 | Jeneric/Pentron, Inc. | Lithium disilicate glass ceramics |
| US6802894B2 (en) | 1998-12-11 | 2004-10-12 | Jeneric/Pentron Incorporated | Lithium disilicate glass-ceramics |
| US7867932B2 (en) | 2007-08-28 | 2011-01-11 | Corning Incorporated | Refractory glass ceramics |
| US9351807B2 (en) | 2011-12-08 | 2016-05-31 | 3M Innovative Properties Company | Lithium silicate glass ceramic material, process of production and use thereof |
| US11236012B2 (en) | 2018-03-28 | 2022-02-01 | Corning Incorporated | Boron phosphate glass-ceramics with low dielectric loss |
Also Published As
| Publication number | Publication date |
|---|---|
| GB1034344A (en) | 1966-06-29 |
| NL254121A (en) | |
| DE1496488B2 (en) | 1971-11-04 |
| DE1496488A1 (en) | 1969-08-07 |
| BE635391A (en) | |
| NL299005A (en) | |
| NL121772C (en) | |
| BE638474A (en) |
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