GB466503A - Improvements in or relating to electric lamps comprising luminescent materials - Google Patents
Improvements in or relating to electric lamps comprising luminescent materialsInfo
- Publication number
- GB466503A GB466503A GB3305135A GB3305135A GB466503A GB 466503 A GB466503 A GB 466503A GB 3305135 A GB3305135 A GB 3305135A GB 3305135 A GB3305135 A GB 3305135A GB 466503 A GB466503 A GB 466503A
- Authority
- GB
- United Kingdom
- Prior art keywords
- silica
- manganese
- rays
- hours
- mixture
- 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
- C09K11/59—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing silicon
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
466,503. Luminescent screens. GENERAL ELECTRIC CO., Ltd., and RANDALL, J. T. Nov. 28, 1935, No. 33051. [Class 98 (i)] [Also in Group XL] A luminescent material adapted to be excited by the rays from a mercury vapour discharge lamp consists of a matrix mainly of cadmium silicate with an activating impurity preferably manganese. The material is prepared by mixing pure cadmium oxide with a silica prepared by the reaction between silicon tetrachloride and water, followed by vacuum drying of the silica at 150‹ C. The mixture is approximately in the proportion of 1 part of cadmium oxide to two parts of silica, and manganese chloride is added in sufficient quantity to give À5 per cent of manganese in the final product. The mixture is dried in vacuo at 180‹ C. for 3 or 4 hours in a silica boat and the temperature is raised slowlv so that it reaches 1000‹ C. in 2 hours. It is maintained at this temperature for about 1 hour, then cooled and powdered. The material has a rose-white colour under the rays from a mercury vapour and argon lamp, but the colour may be modified by the addition of other substances such as calcium tungstate.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3305135A GB466503A (en) | 1935-11-28 | 1935-11-28 | Improvements in or relating to electric lamps comprising luminescent materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB3305135A GB466503A (en) | 1935-11-28 | 1935-11-28 | Improvements in or relating to electric lamps comprising luminescent materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB466503A true GB466503A (en) | 1937-05-28 |
Family
ID=10347872
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3305135A Expired GB466503A (en) | 1935-11-28 | 1935-11-28 | Improvements in or relating to electric lamps comprising luminescent materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB466503A (en) |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747697C (en) * | 1938-06-28 | 1944-10-11 | Manufacture of a cadmium silicate manganese luminophore | |
| US2790921A (en) * | 1954-04-30 | 1957-04-30 | Rca Corp | Red-emitting cathodoluminescent devices |
-
1935
- 1935-11-28 GB GB3305135A patent/GB466503A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE747697C (en) * | 1938-06-28 | 1944-10-11 | Manufacture of a cadmium silicate manganese luminophore | |
| US2790921A (en) * | 1954-04-30 | 1957-04-30 | Rca Corp | Red-emitting cathodoluminescent devices |
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