GB1112777A - Improvements in or relating to luminescent materials - Google Patents
Improvements in or relating to luminescent materialsInfo
- Publication number
- GB1112777A GB1112777A GB49909/65A GB4990965A GB1112777A GB 1112777 A GB1112777 A GB 1112777A GB 49909/65 A GB49909/65 A GB 49909/65A GB 4990965 A GB4990965 A GB 4990965A GB 1112777 A GB1112777 A GB 1112777A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silica
- alkali metal
- present
- ratio
- alumina
- 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
- 239000000463 material Substances 0.000 title abstract 3
- VYPSYNLAJGMNEJ-UHFFFAOYSA-N Silicium dioxide Chemical compound O=[Si]=O VYPSYNLAJGMNEJ-UHFFFAOYSA-N 0.000 abstract 9
- 229910052783 alkali metal Inorganic materials 0.000 abstract 5
- 150000001340 alkali metals Chemical class 0.000 abstract 5
- 239000000377 silicon dioxide Substances 0.000 abstract 4
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- BVKZGUZCCUSVTD-UHFFFAOYSA-L Carbonate Chemical compound [O-]C([O-])=O BVKZGUZCCUSVTD-UHFFFAOYSA-L 0.000 abstract 2
- 229910052693 Europium Inorganic materials 0.000 abstract 2
- JLDSOYXADOWAKB-UHFFFAOYSA-N aluminium nitrate Chemical compound [Al+3].[O-][N+]([O-])=O.[O-][N+]([O-])=O.[O-][N+]([O-])=O JLDSOYXADOWAKB-UHFFFAOYSA-N 0.000 abstract 2
- 239000007858 starting material Substances 0.000 abstract 2
- 239000005995 Aluminium silicate Substances 0.000 abstract 1
- VEXZGXHMUGYJMC-UHFFFAOYSA-M Chloride anion Chemical compound [Cl-] VEXZGXHMUGYJMC-UHFFFAOYSA-M 0.000 abstract 1
- 229910052771 Terbium Inorganic materials 0.000 abstract 1
- 239000003513 alkali Substances 0.000 abstract 1
- 159000000013 aluminium salts Chemical class 0.000 abstract 1
- PZZYQPZGQPZBDN-UHFFFAOYSA-N aluminium silicate Chemical compound O=[Al]O[Si](=O)O[Al]=O PZZYQPZGQPZBDN-UHFFFAOYSA-N 0.000 abstract 1
- 235000012211 aluminium silicate Nutrition 0.000 abstract 1
- 229910000323 aluminium silicate Inorganic materials 0.000 abstract 1
- 229910000329 aluminium sulfate Inorganic materials 0.000 abstract 1
- 229910052792 caesium Inorganic materials 0.000 abstract 1
- TVFDJXOCXUVLDH-UHFFFAOYSA-N caesium atom Chemical compound [Cs] TVFDJXOCXUVLDH-UHFFFAOYSA-N 0.000 abstract 1
- KZHJGOXRZJKJNY-UHFFFAOYSA-N dioxosilane;oxo(oxoalumanyloxy)alumane Chemical compound O=[Si]=O.O=[Si]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O.O=[Al]O[Al]=O KZHJGOXRZJKJNY-UHFFFAOYSA-N 0.000 abstract 1
- 229910001940 europium oxide Inorganic materials 0.000 abstract 1
- AEBZCFFCDTZXHP-UHFFFAOYSA-N europium(3+);oxygen(2-) Chemical compound [O-2].[O-2].[O-2].[Eu+3].[Eu+3] AEBZCFFCDTZXHP-UHFFFAOYSA-N 0.000 abstract 1
- 230000005284 excitation Effects 0.000 abstract 1
- 238000010348 incorporation Methods 0.000 abstract 1
- 229910052748 manganese Inorganic materials 0.000 abstract 1
- QSHDDOUJBYECFT-UHFFFAOYSA-N mercury Chemical compound [Hg] QSHDDOUJBYECFT-UHFFFAOYSA-N 0.000 abstract 1
- 229910052753 mercury Inorganic materials 0.000 abstract 1
- 229910052863 mullite Inorganic materials 0.000 abstract 1
- 229910052700 potassium Inorganic materials 0.000 abstract 1
- 230000005855 radiation Effects 0.000 abstract 1
Classifications
-
- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7728—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing europium
- C09K11/77344—Aluminosilicates
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Glass Compositions (AREA)
Abstract
A luminescent material consisting of an aluminium silicate composition of molar ratio alumina (Al2O3) to silica (SiO2) in the range 1:1 to 1:6 activated by Eu (generally present in the lower valency state) is excited by U.V. radiation of long and short wavelength, cathode rays and X-rays. Tb and/or Mn, and/or alkali metals may be added to modify colour and brightness. (Caesium gives little or no improvement). A large number of concentrations are disclosed including alumina to silica ratio preferably 1:1.5 to 1:3 with no alkali metal present, 1:2.5 to 1:3.5 with alkali metal for optimum brightness but 1:3.5 to 1:4 for best temperature characteristics; alkali atoms to Al2O3 mols in ratio \sO 1:1 (e.g. 0.8:1) preferably 0.1:1 to 0.2:1; Eu from a trace to 20% preferably \sO 10% by wt. for best temperature characteristics (e.g. 3-4%); Tb may be present in same amount as Eu or in excess to a weight ratio 8:1 provided Eu and Tb content does not exceed 20% by wt., preferably 10% while Mn may be from a trace to 2.5% by wt.; (all per cent are by wt. of starting materials). In the preparation a mixture of starting compounds, preferably an aluminium salt is decomposed by heat to give aluminium nitrate, silica, europium oxide, optionally an oxide or carbonate of Tb and/or Mn and/or chloride or carbonate of an alkali metal, is heated in a reducing atmosphere preferably at at least 950 DEG C. (e.g. 1100 DEG C.) if alkali metal is present, otherwise at least 1050 DEG C. preferably 1150 DEG to 1250 DEG C. In eight examples, materials used include Na, Tb, Mn, K, Li, Rb. Excitation frequencies of 3000<\>rA, 3650<\>rA, 2537<\>rA are instanced. Incorporation in high and low pressure mercury lamps, C.R.Ts and X-ray screens is mentioned. Over the whole alumina: silica range specified, the matrices consist of a mullite type crystalline phase of composition in the range 3Al2O3.2SiO2 to 2Al2O3.1SiO2 with a second phase of free silica in crystalline or vitreous form.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB49909/65A GB1112777A (en) | 1965-11-24 | 1965-11-24 | Improvements in or relating to luminescent materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB49909/65A GB1112777A (en) | 1965-11-24 | 1965-11-24 | Improvements in or relating to luminescent materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1112777A true GB1112777A (en) | 1968-05-08 |
Family
ID=10453959
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB49909/65A Expired GB1112777A (en) | 1965-11-24 | 1965-11-24 | Improvements in or relating to luminescent materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1112777A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004029177A1 (en) * | 2002-09-24 | 2004-04-08 | Osram Opto Semiconductors Gmbh | Luminescent material and light emitting diode using the same |
-
1965
- 1965-11-24 GB GB49909/65A patent/GB1112777A/en not_active Expired
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2004029177A1 (en) * | 2002-09-24 | 2004-04-08 | Osram Opto Semiconductors Gmbh | Luminescent material and light emitting diode using the same |
| EP1413619A1 (en) * | 2002-09-24 | 2004-04-28 | Osram Opto Semiconductors GmbH | Luminescent material, especially for LED application |
| US7485243B2 (en) | 2002-09-24 | 2009-02-03 | Osram Opto Semiconductors Gmbh | Luminescent material and light emitting diode using the same |
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