GB1510429A - Luminescent materials - Google Patents
Luminescent materialsInfo
- Publication number
- GB1510429A GB1510429A GB49208/76A GB4920876A GB1510429A GB 1510429 A GB1510429 A GB 1510429A GB 49208/76 A GB49208/76 A GB 49208/76A GB 4920876 A GB4920876 A GB 4920876A GB 1510429 A GB1510429 A GB 1510429A
- Authority
- GB
- United Kingdom
- Prior art keywords
- compositions
- nov
- nitrogen
- composition
- luminescent materials
- 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
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
- Cathode-Ray Tubes And Fluorescent Screens For Display (AREA)
Abstract
1510429 Luminescent materials PHILIPS ELECTRONIC & ASSOCIATED INDUSTRIES Ltd 25 Nov 1976 [28 Nov 1975] 49208/76 Heading C4S A fired luminescent material activated by trivalent terbium has a composition of formula (0À5-x-y)Ce 2 O 3 . x La 2 O 3 . y Tb 2 O 3 . MO. p Al 2 O 3 where M is Mg, Zn or Be or mixtures thereof, up to 25 mole per cent of Al may be replaced by Ga and/or Sc, x is 0 to 0À2, y is 0À05 to 0À25 and p is 6À2 to 25. Preferably x is 0, y is 0À15 to 0À2 and p is 10 to 15. A number of specific compositions with different amounts of Al 2 O 3 are disclosed. The compositions may be made by treating a suspension of Al 2 O 3 in a solution containing Ce, Mg and Tb and optionally Al 2 (NO 3 ) 3 , with NH 4 OH. The precipitate is heated twice in air, cooled in nitrogen and then heated again in a damp mixture of nitrogen and hydrogen. The composition may be coated on the inside of a low-pressure mercury vapour discharge tube using nitrocellulose as a binder. The compositions are said to have equal or superior luminous flux after long hours to compositions with a much lower alumina content.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NLAANVRAGE7513898,A NL178517C (en) | 1975-11-28 | 1975-11-28 | LUMINESCENT SCREEN; LOW-PRESSURE MERCURY DISCHARGE LAMP; METHOD FOR PREPARING A LUMINESCENT ALUMINATE |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB1510429A true GB1510429A (en) | 1978-05-10 |
Family
ID=19824938
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB49208/76A Expired GB1510429A (en) | 1975-11-28 | 1976-11-25 | Luminescent materials |
Country Status (10)
| Country | Link |
|---|---|
| JP (1) | JPS5268084A (en) |
| AR (1) | AR215606A1 (en) |
| AU (1) | AU509091B2 (en) |
| BE (1) | BE848835A (en) |
| CA (1) | CA1096603A (en) |
| DE (1) | DE2652472A1 (en) |
| FR (1) | FR2333037A1 (en) |
| GB (1) | GB1510429A (en) |
| IT (1) | IT1064645B (en) |
| NL (1) | NL178517C (en) |
Families Citing this family (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS60121099U (en) * | 1984-01-26 | 1985-08-15 | 不二サッシ株式会社 | Wind-stopping material for sliding shoji sliding shoji fittings |
| JPS60141390U (en) * | 1984-03-01 | 1985-09-19 | 不二サッシ株式会社 | Wind-stopping material for sliding shoji sliding shoji fittings |
| JPH0349038Y2 (en) * | 1984-09-19 | 1991-10-18 | ||
| DE102017207796B4 (en) | 2017-05-09 | 2023-12-14 | Vitesco Technologies GmbH | Method for attaching a permanent magnet in a magnetic pocket of a rotor for an electrical machine |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| GB1500902A (en) * | 1974-01-17 | 1978-02-15 | Thorn Electrical Ind Ltd | Phosphors and their preparation |
-
1975
- 1975-11-28 NL NLAANVRAGE7513898,A patent/NL178517C/en not_active IP Right Cessation
-
1976
- 1976-11-18 DE DE19762652472 patent/DE2652472A1/en not_active Withdrawn
- 1976-11-23 AR AR265579A patent/AR215606A1/en active
- 1976-11-24 CA CA266,422A patent/CA1096603A/en not_active Expired
- 1976-11-25 GB GB49208/76A patent/GB1510429A/en not_active Expired
- 1976-11-25 JP JP51140813A patent/JPS5268084A/en active Granted
- 1976-11-25 AU AU19994/76A patent/AU509091B2/en not_active Expired
- 1976-11-25 IT IT29783/76A patent/IT1064645B/en active
- 1976-11-26 FR FR7635734A patent/FR2333037A1/en active Granted
- 1976-11-26 BE BE172781A patent/BE848835A/en not_active IP Right Cessation
Also Published As
| Publication number | Publication date |
|---|---|
| NL7513898A (en) | 1977-06-01 |
| DE2652472A1 (en) | 1977-06-08 |
| FR2333037B1 (en) | 1981-08-28 |
| FR2333037A1 (en) | 1977-06-24 |
| AU509091B2 (en) | 1980-04-17 |
| BE848835A (en) | 1977-05-26 |
| IT1064645B (en) | 1985-02-25 |
| AU1999476A (en) | 1978-06-01 |
| AR215606A1 (en) | 1979-10-31 |
| JPS5268084A (en) | 1977-06-06 |
| NL178517C (en) | 1986-04-01 |
| CA1096603A (en) | 1981-03-03 |
| JPS5761068B2 (en) | 1982-12-22 |
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Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| PS | Patent sealed | ||
| PCNP | Patent ceased through non-payment of renewal fee |