GB905566A - Manufacture of semicrystalline ceramic bodies - Google Patents
Manufacture of semicrystalline ceramic bodiesInfo
- Publication number
- GB905566A GB905566A GB687261A GB687261A GB905566A GB 905566 A GB905566 A GB 905566A GB 687261 A GB687261 A GB 687261A GB 687261 A GB687261 A GB 687261A GB 905566 A GB905566 A GB 905566A
- Authority
- GB
- United Kingdom
- Prior art keywords
- atmosphere
- heating
- glass
- treatment
- oxidizing atmosphere
- 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
- 239000000919 ceramic Substances 0.000 title abstract 3
- 238000004519 manufacturing process Methods 0.000 title 1
- 238000010438 heat treatment Methods 0.000 abstract 6
- 239000011521 glass Substances 0.000 abstract 4
- 230000001590 oxidative effect Effects 0.000 abstract 3
- IJGRMHOSHXDMSA-UHFFFAOYSA-N Atomic nitrogen Chemical compound N#N IJGRMHOSHXDMSA-UHFFFAOYSA-N 0.000 abstract 2
- 238000001816 cooling Methods 0.000 abstract 2
- 239000000203 mixture Substances 0.000 abstract 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 abstract 2
- 229910018072 Al 2 O 3 Inorganic materials 0.000 abstract 1
- UFHFLCQGNIYNRP-UHFFFAOYSA-N Hydrogen Chemical compound [H][H] UFHFLCQGNIYNRP-UHFFFAOYSA-N 0.000 abstract 1
- 229910018068 Li 2 O Inorganic materials 0.000 abstract 1
- 229910004298 SiO 2 Inorganic materials 0.000 abstract 1
- 229910010413 TiO 2 Inorganic materials 0.000 abstract 1
- 239000012670 alkaline solution Substances 0.000 abstract 1
- 238000004320 controlled atmosphere Methods 0.000 abstract 1
- 239000002360 explosive Substances 0.000 abstract 1
- 239000001257 hydrogen Substances 0.000 abstract 1
- 229910052739 hydrogen Inorganic materials 0.000 abstract 1
- 239000012535 impurity Substances 0.000 abstract 1
- 238000000034 method Methods 0.000 abstract 1
- 229910052757 nitrogen Inorganic materials 0.000 abstract 1
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
- 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
-
- 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
- C03C10/0018—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
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
905,566. Ceramic glass bodies. CORNING GLASS WORKS. Feb. 24, 1961 [March 7, 1960 (2)], No. 6872/61. Class 56. In the heat treatment of a glass body to a semi-crystalline body, the resistance to attack by alkaline solutions is increased by carrying out the treatment in a controlled atmosphere comprising at least 25% by volume of water vapour or, alternatively, in a reducing atmosphere equivalent to 1-10% of excess combustibles therein until the temperature has reached 900-1000‹ C. and thereafter substituting therefor an oxidizing atmosphere and maintaining the oxidizing atmosphere during the final heating and the cooling to below about 1000‹ C. The process is particularly used in the heat-treatment of ceramic glass as in Specification 857,367 and of the composition in percentages by weight: SiO 2 70; Li 2 O 2.5; Al 2 O 3 , 18; TiO 2 4.5; MgO 3; ZnO 1, with up to 1 impurities, the glass being heated to about 800‹ C., held for 1 hour, heating to 1080-1175‹ C., held at 1080-1120‹ C. for 4 hours, at 1120-1175‹ C. for 2 hours and cooled. To produce the water vapour atmosphere, dry steam is passed under pressure into the heating kiln which is maintained throughout the heating and cooling. The reducing atmosphere is produced by passing a non-explosive mixture of nitrogen and hydrogen into the kiln, or, in gas-fired kilns, variation of the air supply gives first the reducing and then oxidizing atmosphere. Specifications 829,147 and 857,367 are referred to.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US1294160A | 1960-03-07 | 1960-03-07 | |
| US12976A US3013362A (en) | 1960-03-07 | 1960-03-07 | Manufacture of semicrystalline ceramic bodies |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB905566A true GB905566A (en) | 1962-09-12 |
Family
ID=26684215
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB687261A Expired GB905566A (en) | 1960-03-07 | 1961-02-24 | Manufacture of semicrystalline ceramic bodies |
Country Status (4)
| Country | Link |
|---|---|
| DE (2) | DE1254829B (en) |
| FR (1) | FR1283488A (en) |
| GB (1) | GB905566A (en) |
| NL (3) | NL7203205A (en) |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3522103A (en) * | 1967-07-28 | 1970-07-28 | Gen Electric | Process for the densification of mixed nickel oxide and stabilized zirconia |
Family Cites Families (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| BE557975A (en) * | 1956-06-04 | 1957-11-30 | ||
| NL236367A (en) * | 1958-03-03 |
-
0
- NL NL261588D patent/NL261588A/xx unknown
- DE DENDAT1252378D patent/DE1252378B/de active Pending
- NL NL136095D patent/NL136095C/xx active
-
1961
- 1961-02-24 GB GB687261A patent/GB905566A/en not_active Expired
- 1961-03-06 FR FR854703A patent/FR1283488A/en not_active Expired
- 1961-03-06 DE DE1961C0032178 patent/DE1254829B/en active Pending
-
1972
- 1972-03-10 NL NL7203205A patent/NL7203205A/xx unknown
Also Published As
| Publication number | Publication date |
|---|---|
| NL136095C (en) | |
| NL7203205A (en) | 1972-06-26 |
| DE1252378B (en) | |
| FR1283488A (en) | 1962-02-02 |
| DE1254829B (en) | 1967-11-23 |
| NL261588A (en) |
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