GB781127A - Improvements in or relating to methods of producing red luminescent materials - Google Patents
Improvements in or relating to methods of producing red luminescent materialsInfo
- Publication number
- GB781127A GB781127A GB21441/55A GB2144155A GB781127A GB 781127 A GB781127 A GB 781127A GB 21441/55 A GB21441/55 A GB 21441/55A GB 2144155 A GB2144155 A GB 2144155A GB 781127 A GB781127 A GB 781127A
- Authority
- GB
- United Kingdom
- Prior art keywords
- atom
- per
- grs
- luminescent materials
- july
- 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
- C09K11/66—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing germanium, tin or lead
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
781,127. Luminescent materials: discharge lamps. PHILIPS ELECTRICAL INDUSTRIES, Ltd. July 25, 1955 [July 28, 1954], No. 21441/55. Drawings to Specification. Class 39(1). Method of producing a red luminescing material, particularly for use on a bulb surrounding a high pressure mercury vapour tube, in which a mixture of compounds of Mg, Ge and Mn, containing, per gr. atom of Ge, 2À5 to 10 gr. atoms of Mg and 0À001 to 0À05 gr. atom of Mn, is heated to a temperature between 1000‹C. and 1250‹C., is characterised in that the heating takes place in the presence of 0À001 to 0À1 gr. molecule of B 2 O 3 per gr. atom of Ge. At least one of the compounds can be an oxide, a carbonate or a nitrate. The heating of the materials is preferably carried out in an oxidising atmosphere. In a specific example 12À68 grs. of MgO, 10À46 grs. of GeO 2 and 0À25 grs. of B 2 O 3 are mixed and moistened by 10 c.cs. of a manganese nitrate solution containing 10-<SP>4</SP> gr. atom of manganese per c.c. The moist, mixture is ground with 50 c.cs. of 96 per cent alcohol in a porcelain ball mill for 15 hours and the product dried and heated to a temperature of 1200‹C. in air for 3 hours.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL781127X | 1954-07-28 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB781127A true GB781127A (en) | 1957-08-14 |
Family
ID=19831895
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB21441/55A Expired GB781127A (en) | 1954-07-28 | 1955-07-25 | Improvements in or relating to methods of producing red luminescent materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB781127A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3468810A (en) * | 1965-03-26 | 1969-09-23 | Matsushita Electronics Corp | Method of making terbium activated alkaline earth silicate phosphors |
-
1955
- 1955-07-25 GB GB21441/55A patent/GB781127A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US3468810A (en) * | 1965-03-26 | 1969-09-23 | Matsushita Electronics Corp | Method of making terbium activated alkaline earth silicate phosphors |
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