GB1452898A - Phosphors - Google Patents
PhosphorsInfo
- Publication number
- GB1452898A GB1452898A GB5048973A GB5048973A GB1452898A GB 1452898 A GB1452898 A GB 1452898A GB 5048973 A GB5048973 A GB 5048973A GB 5048973 A GB5048973 A GB 5048973A GB 1452898 A GB1452898 A GB 1452898A
- Authority
- GB
- United Kingdom
- Prior art keywords
- fluoride
- alkali
- heating
- oct
- gadolinium
- 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
- 239000003513 alkali Substances 0.000 abstract 4
- 238000010438 heat treatment Methods 0.000 abstract 3
- 239000000203 mixture Substances 0.000 abstract 3
- 239000012190 activator Substances 0.000 abstract 2
- 238000000034 method Methods 0.000 abstract 2
- NROKBHXJSPEDAR-UHFFFAOYSA-M potassium fluoride Chemical compound [F-].[K+] NROKBHXJSPEDAR-UHFFFAOYSA-M 0.000 abstract 2
- PUZPDOWCWNUUKD-UHFFFAOYSA-M sodium fluoride Chemical compound [F-].[Na+] PUZPDOWCWNUUKD-UHFFFAOYSA-M 0.000 abstract 2
- DDFHBQSCUXNBSA-UHFFFAOYSA-N 5-(5-carboxythiophen-2-yl)thiophene-2-carboxylic acid Chemical compound S1C(C(=O)O)=CC=C1C1=CC=C(C(O)=O)S1 DDFHBQSCUXNBSA-UHFFFAOYSA-N 0.000 abstract 1
- DJHGAFSJWGLOIV-UHFFFAOYSA-K Arsenate3- Chemical class [O-][As]([O-])([O-])=O DJHGAFSJWGLOIV-UHFFFAOYSA-K 0.000 abstract 1
- 229910052692 Dysprosium Inorganic materials 0.000 abstract 1
- 229910052691 Erbium Inorganic materials 0.000 abstract 1
- 229910052693 Europium Inorganic materials 0.000 abstract 1
- 229910052688 Gadolinium Inorganic materials 0.000 abstract 1
- 229910052689 Holmium Inorganic materials 0.000 abstract 1
- -1 NH 4 Inorganic materials 0.000 abstract 1
- 229910052779 Neodymium Inorganic materials 0.000 abstract 1
- 229910019142 PO4 Inorganic materials 0.000 abstract 1
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 abstract 1
- 229910052777 Praseodymium Inorganic materials 0.000 abstract 1
- 229910052772 Samarium Inorganic materials 0.000 abstract 1
- NINIDFKCEFEMDL-UHFFFAOYSA-N Sulfur Chemical compound [S] NINIDFKCEFEMDL-UHFFFAOYSA-N 0.000 abstract 1
- 239000005864 Sulphur Substances 0.000 abstract 1
- 229910052771 Terbium Inorganic materials 0.000 abstract 1
- 229910052775 Thulium Inorganic materials 0.000 abstract 1
- 239000000654 additive Substances 0.000 abstract 1
- 238000001816 cooling Methods 0.000 abstract 1
- 238000010894 electron beam technology Methods 0.000 abstract 1
- 229940075613 gadolinium oxide Drugs 0.000 abstract 1
- 229910001938 gadolinium oxide Inorganic materials 0.000 abstract 1
- CMIHHWBVHJVIGI-UHFFFAOYSA-N gadolinium(iii) oxide Chemical compound [O-2].[O-2].[O-2].[Gd+3].[Gd+3] CMIHHWBVHJVIGI-UHFFFAOYSA-N 0.000 abstract 1
- 239000000463 material Substances 0.000 abstract 1
- SIWVEOZUMHYXCS-UHFFFAOYSA-N oxo(oxoyttriooxy)yttrium Chemical compound O=[Y]O[Y]=O SIWVEOZUMHYXCS-UHFFFAOYSA-N 0.000 abstract 1
- 239000002245 particle Substances 0.000 abstract 1
- 235000021317 phosphate Nutrition 0.000 abstract 1
- 150000003013 phosphoric acid derivatives Chemical class 0.000 abstract 1
- 229920001021 polysulfide Polymers 0.000 abstract 1
- 229910052700 potassium Inorganic materials 0.000 abstract 1
- 235000003270 potassium fluoride Nutrition 0.000 abstract 1
- 239000011698 potassium fluoride Substances 0.000 abstract 1
- 238000002360 preparation method Methods 0.000 abstract 1
- 229910052708 sodium Inorganic materials 0.000 abstract 1
- 239000011734 sodium Substances 0.000 abstract 1
- 235000013024 sodium fluoride Nutrition 0.000 abstract 1
- 239000011775 sodium fluoride Substances 0.000 abstract 1
- 150000004763 sulfides Chemical class 0.000 abstract 1
- XTQHKBHJIVJGKJ-UHFFFAOYSA-N sulfur monoxide Chemical compound S=O XTQHKBHJIVJGKJ-UHFFFAOYSA-N 0.000 abstract 1
- 150000003467 sulfuric acid derivatives Chemical class 0.000 abstract 1
- 150000003567 thiocyanates Chemical class 0.000 abstract 1
- TYIZUJNEZNBXRS-UHFFFAOYSA-K trifluorogadolinium Chemical compound F[Gd](F)F TYIZUJNEZNBXRS-UHFFFAOYSA-K 0.000 abstract 1
- 229910052727 yttrium Inorganic materials 0.000 abstract 1
- 229940105963 yttrium fluoride Drugs 0.000 abstract 1
- RBORBHYCVONNJH-UHFFFAOYSA-K yttrium(iii) fluoride Chemical compound F[Y](F)F RBORBHYCVONNJH-UHFFFAOYSA-K 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
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7767—Chalcogenides
- C09K11/7769—Oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
- Formation Of Various Coating Films On Cathode Ray Tubes And Lamps (AREA)
Abstract
1452898 Luminescent materials RCA CORPORATION 30 Oct 1973 [30 Oct 1972] 50489/73 Heading C4S A method for preparing activated Y, or Gd or Y-Gd oxysulphide phosphors comprises heating between 700‹ and 1250‹ C. a mixture including (a) at least one of yttrium oxide and gadolinium oxide, (b) at least one of sodium fluoride, potassium fluoride, ammonium fluoride, yttrium fluoride and gadolinium fluoride in amount 0À01 to 0À30 gram atoms of fluoride radical/grm. atom of Y and/or Gd, (c) at least one activator in gram atom ratio to the Y and/or Gd of 0À001 to 0À01 and (d) a sulphur containing composition selected from alkali thiocyanates, alkali rhodanides, and compositions which yield alkali sulphides and polysulphides on heating, then cooling to room temperature. "Alkali" is defined to mean Na, K, NH 4 , Cs and Li. The process produces larger particles (e.g. 3À9 to 8À4 Á) including sintered agglomerates. Activators may be one or more of Dy, Er, Eu, Ho, Nd, Pr, Sm, Tb and Tm. Detailed preparations are included. Additives such as phosphates, sulphates, arsenates and/or germanates of one or more alkalis which are washed out after heating increase brightness. (Y 0À965 Eu 0À035 ) 2 O 2 S is specified and Tables I and II include details such as C.I.E. co-ordinates. The phosphor may be incorporated in an electron beam device.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US30229972A | 1972-10-30 | 1972-10-30 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1452898A true GB1452898A (en) | 1976-10-20 |
Family
ID=23167149
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB5048973A Expired GB1452898A (en) | 1972-10-30 | 1973-10-30 | Phosphors |
Country Status (7)
| Country | Link |
|---|---|
| JP (1) | JPS5210786B2 (en) |
| BE (1) | BE806670A (en) |
| CA (1) | CA1021147A (en) |
| FR (1) | FR2204671B1 (en) |
| GB (1) | GB1452898A (en) |
| IT (1) | IT999710B (en) |
| NL (1) | NL7314831A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288264A (en) | 1979-11-21 | 1981-09-08 | Emi Limited | Detector construction |
| US4871471A (en) * | 1987-05-20 | 1989-10-03 | Mitsubishi Denki Kabushiki Kaisha | Phosphor for cathode ray tube |
Families Citing this family (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB9901809D0 (en) * | 1999-01-27 | 1999-03-17 | Scarista Limited | Highly purified ethgyl epa and other epa derivatives for psychiatric and neurological disorderes |
-
1973
- 1973-10-22 CA CA183,907A patent/CA1021147A/en not_active Expired
- 1973-10-29 JP JP12154773A patent/JPS5210786B2/ja not_active Expired
- 1973-10-29 BE BE137195A patent/BE806670A/en unknown
- 1973-10-29 FR FR7338466A patent/FR2204671B1/fr not_active Expired
- 1973-10-29 NL NL7314831A patent/NL7314831A/xx not_active Application Discontinuation
- 1973-10-30 GB GB5048973A patent/GB1452898A/en not_active Expired
- 1973-10-30 IT IT7021373A patent/IT999710B/en active
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4288264A (en) | 1979-11-21 | 1981-09-08 | Emi Limited | Detector construction |
| US4871471A (en) * | 1987-05-20 | 1989-10-03 | Mitsubishi Denki Kabushiki Kaisha | Phosphor for cathode ray tube |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2354337A1 (en) | 1974-05-09 |
| FR2204671B1 (en) | 1978-11-17 |
| IT999710B (en) | 1976-03-10 |
| JPS4976787A (en) | 1974-07-24 |
| FR2204671A1 (en) | 1974-05-24 |
| NL7314831A (en) | 1974-05-02 |
| CA1021147A (en) | 1977-11-22 |
| BE806670A (en) | 1974-02-15 |
| AU6155973A (en) | 1975-04-24 |
| DE2354337B2 (en) | 1976-02-19 |
| JPS5210786B2 (en) | 1977-03-26 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |