GB1187950A - New Method for Producing Europium Activated Yttrium Oxide Phosphors. - Google Patents
New Method for Producing Europium Activated Yttrium Oxide Phosphors.Info
- Publication number
- GB1187950A GB1187950A GB1632769A GB1632769A GB1187950A GB 1187950 A GB1187950 A GB 1187950A GB 1632769 A GB1632769 A GB 1632769A GB 1632769 A GB1632769 A GB 1632769A GB 1187950 A GB1187950 A GB 1187950A
- Authority
- GB
- United Kingdom
- Prior art keywords
- yttrium oxide
- phosphor
- europium activated
- new method
- activated yttrium
- 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
- C09K11/7783—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals one of which being europium
- C09K11/7784—Chalcogenides
- C09K11/7787—Oxides
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
1,187,950. Luminescent materials and uses thereof. WESTINGHOUSE ELECTRIC CORP. 28 March, 1969 [16 April, 1968; 18 Feb., 1969], No. 16327/69. Heading C4S. Europium activated yttrium oxide phosphor is prepared by mixing europium and yttrium oxides in the molar ratio desired in the phosphor (e.g. 93.7 : 6-3), adding at least one of ZaCi 2 or NH 4 Cl as flux in amount such the chlorine constitutes at least 1% e.g. (5or 10 %) of the europium and yttrium oxides, and firing the mixture at 1150‹ to 1400‹ C. for example, in a covered silica crucible in an atmosphere comprising oxygen, e.g. air. The phosphor may be washed in a 0 normal HC1 solution. Excitation by 2540 A radiation and inclusion in c.r.t.'s and fluorescent lamps is instanced.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US72156968A | 1968-04-16 | 1968-04-16 | |
| US80027269A | 1969-02-18 | 1969-02-18 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1187950A true GB1187950A (en) | 1970-04-15 |
Family
ID=27110444
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1632769A Expired GB1187950A (en) | 1968-04-16 | 1969-03-28 | New Method for Producing Europium Activated Yttrium Oxide Phosphors. |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB1187950A (en) |
-
1969
- 1969-03-28 GB GB1632769A patent/GB1187950A/en not_active Expired
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |