FR2087352A5 - Transparent glass ceramic - based on alumina phosphorus pentoxide with boric oxide nucleating agent - Google Patents
Transparent glass ceramic - based on alumina phosphorus pentoxide with boric oxide nucleating agentInfo
- Publication number
- FR2087352A5 FR2087352A5 FR7017763A FR7017763A FR2087352A5 FR 2087352 A5 FR2087352 A5 FR 2087352A5 FR 7017763 A FR7017763 A FR 7017763A FR 7017763 A FR7017763 A FR 7017763A FR 2087352 A5 FR2087352 A5 FR 2087352A5
- Authority
- FR
- France
- Prior art keywords
- transparent glass
- nucleating agent
- glass ceramic
- phosphorus pentoxide
- degrees
- 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
- DLYUQMMRRRQYAE-UHFFFAOYSA-N tetraphosphorus decaoxide Chemical compound O1P(O2)(=O)OP3(=O)OP1(=O)OP2(=O)O3 DLYUQMMRRRQYAE-UHFFFAOYSA-N 0.000 title abstract 4
- 229910011255 B2O3 Inorganic materials 0.000 title abstract 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 title abstract 2
- JKWMSGQKBLHBQQ-UHFFFAOYSA-N diboron trioxide Chemical compound O=BOB=O JKWMSGQKBLHBQQ-UHFFFAOYSA-N 0.000 title abstract 2
- 239000002241 glass-ceramic Substances 0.000 title 1
- 239000002667 nucleating agent Substances 0.000 title 1
- 229910052783 alkali metal Inorganic materials 0.000 abstract 1
- 150000001340 alkali metals Chemical class 0.000 abstract 1
- 238000000137 annealing Methods 0.000 abstract 1
- 238000005266 casting Methods 0.000 abstract 1
- 239000000919 ceramic Substances 0.000 abstract 1
- 229910052593 corundum Inorganic materials 0.000 abstract 1
- 230000008018 melting Effects 0.000 abstract 1
- 238000002844 melting Methods 0.000 abstract 1
- 229910052751 metal Inorganic materials 0.000 abstract 1
- 239000002184 metal Substances 0.000 abstract 1
- 229910001845 yogo sapphire 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
- C03C3/00—Glass compositions
- C03C3/12—Silica-free oxide glass compositions
- C03C3/16—Silica-free oxide glass compositions containing phosphorus
- C03C3/19—Silica-free oxide glass compositions containing phosphorus containing boron
-
- 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
Abstract
Ceremic contains >=50% of fine grained pref. 30 mu, randomly orientated crystallites in a glassy phase and has compsn. 50-80 wt. % P2O5, 5-20% B2O3, 10-30% Al2O3. MgO, CaO and/or ZnO may be added to improve physical and electrical properties, usually at the expense of transparency. Pref. prepn. comprises melting, casting, annealing 450-650 degrees C, nucleating at 500-700 degrees C for1/j to 2 hrs. and crystallising at 650-1050 degrees C, for 1/i to 4 hrs. Resistant to alkali metal vapours and used for high temp. lamps and metal ceramic seals.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7017763A FR2087352A5 (en) | 1970-05-15 | 1970-05-15 | Transparent glass ceramic - based on alumina phosphorus pentoxide with boric oxide nucleating agent |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| FR7017763A FR2087352A5 (en) | 1970-05-15 | 1970-05-15 | Transparent glass ceramic - based on alumina phosphorus pentoxide with boric oxide nucleating agent |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| FR2087352A5 true FR2087352A5 (en) | 1971-12-31 |
Family
ID=9055581
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| FR7017763A Expired FR2087352A5 (en) | 1970-05-15 | 1970-05-15 | Transparent glass ceramic - based on alumina phosphorus pentoxide with boric oxide nucleating agent |
Country Status (1)
| Country | Link |
|---|---|
| FR (1) | FR2087352A5 (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2419922A1 (en) * | 1978-03-16 | 1979-10-12 | Owens Illinois Inc | POLYCRYSTALLINE CERAMICS FORMED FROM MELTED MASSES AND DOPING HOSTS CONTAINING PHOSPHORUS |
| WO1991010627A1 (en) * | 1990-01-16 | 1991-07-25 | E.I. Du Pont De Nemours And Company | Metaphosphate glass composition |
-
1970
- 1970-05-15 FR FR7017763A patent/FR2087352A5/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2419922A1 (en) * | 1978-03-16 | 1979-10-12 | Owens Illinois Inc | POLYCRYSTALLINE CERAMICS FORMED FROM MELTED MASSES AND DOPING HOSTS CONTAINING PHOSPHORUS |
| WO1991010627A1 (en) * | 1990-01-16 | 1991-07-25 | E.I. Du Pont De Nemours And Company | Metaphosphate glass composition |
| US5196381A (en) * | 1990-01-16 | 1993-03-23 | E. I. Du Pont De Nemours And Company | Metaphosphate glass composition |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| ST | Notification of lapse |