GB1264422A - - Google Patents
Info
- Publication number
- GB1264422A GB1264422A GB1264422DA GB1264422A GB 1264422 A GB1264422 A GB 1264422A GB 1264422D A GB1264422D A GB 1264422DA GB 1264422 A GB1264422 A GB 1264422A
- Authority
- GB
- United Kingdom
- Prior art keywords
- phosphate
- phosphor
- divalent
- feb
- compounds
- 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
- 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
- C09K11/7737—Phosphates
- C09K11/7738—Phosphates with alkaline earth metals
- C09K11/7739—Phosphates with alkaline earth metals with halogens
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
1,264,422. Luminescent materials. G. T. E. SYLVANIA Inc. 13 Feb., 1969 [29 Feb., 1968], No. 7958/69. Heading C4S. A phosphor comprises a divalent Eu activated Sr, Ba and/or Ca halophosphate. The phosphor has an apatite structure and is represented by M# 10-x Eu<SP>2+</SP> x .X 2 (PO 4 ) 6 , where Me is Sr, Ba and/or Ca; X is Cl or Br and 1À5 # x # 0À0005. The phosphor is prepared from Me di-orthophosphate and Me carbonate, NH 4 or MeX 2 and EU 2 O 3 , or from NH 4 phosphate, chloride and/or bromide, Me compounds and compounds of Eu which decompose on heating into the oxide, alternatively Eu phosphate may be coprecipitated with Me phosphate. The materials are mixed and fired first in covered crucibles in air or N 2 then in H 2 and N 2 to ensure that the Eu is divalent.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US70921368A | 1968-02-29 | 1968-02-29 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1264422A true GB1264422A (en) | 1972-02-23 |
Family
ID=24848926
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1264422D Expired GB1264422A (en) | 1968-02-29 | 1969-02-13 |
Country Status (3)
| Country | Link |
|---|---|
| BE (1) | BE729088A (en) |
| CA (1) | CA956451A (en) |
| GB (1) | GB1264422A (en) |
Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2077595A1 (en) * | 1970-01-14 | 1971-10-29 | Westinghouse Electric Corp | |
| EP0074585A1 (en) * | 1981-09-03 | 1983-03-23 | Kabushiki Kaisha Toshiba | Blue-green emitting halophosphate phosphor, and fluorescent lamp employing the same |
| US4527087A (en) * | 1981-09-03 | 1985-07-02 | Tokyo Shibaura Denki Kabushiki Kaisha | Fluorescent lamp |
| EP0212064A2 (en) * | 1985-08-30 | 1987-03-04 | Kabushiki Kaisha Toshiba | Halophosphate phosphor and fluorescent lamp using the same |
Families Citing this family (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4458176A (en) * | 1977-09-06 | 1984-07-03 | Gte Products Corporation | Daylight fluorescent lamps employing blend |
| US4426600A (en) | 1977-09-06 | 1984-01-17 | Gte Products Corporation | Standard white fluorescent lamps employing blend |
| US4258285A (en) | 1979-06-22 | 1981-03-24 | Gte Products Corporation | Two-component phosphor in a cool white lamp |
| US4266161A (en) | 1979-06-22 | 1981-05-05 | Gte Products Corporation | Cool white lamp using a two-component phosphor |
| US4698548A (en) * | 1985-10-15 | 1987-10-06 | Gte Products Corporation | Lamp incorporating phosphor blend of calcium fluorophosphate and strontium halophosphate |
-
1969
- 1969-02-13 GB GB1264422D patent/GB1264422A/en not_active Expired
- 1969-02-27 CA CA044,142A patent/CA956451A/en not_active Expired
- 1969-02-28 BE BE729088D patent/BE729088A/xx unknown
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| FR2077595A1 (en) * | 1970-01-14 | 1971-10-29 | Westinghouse Electric Corp | |
| EP0074585A1 (en) * | 1981-09-03 | 1983-03-23 | Kabushiki Kaisha Toshiba | Blue-green emitting halophosphate phosphor, and fluorescent lamp employing the same |
| US4527087A (en) * | 1981-09-03 | 1985-07-02 | Tokyo Shibaura Denki Kabushiki Kaisha | Fluorescent lamp |
| EP0212064A2 (en) * | 1985-08-30 | 1987-03-04 | Kabushiki Kaisha Toshiba | Halophosphate phosphor and fluorescent lamp using the same |
| EP0212064A3 (en) * | 1985-08-30 | 1987-07-01 | Kabushiki Kaisha Toshiba | Halophosphate phosphor and fluorescent lamp using the same |
Also Published As
| Publication number | Publication date |
|---|---|
| CA956451A (en) | 1974-10-22 |
| BE729088A (en) | 1969-08-01 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PE20 | Patent expired after termination of 20 years |