GB568789A - Improvements relating to the production of luminescent materials - Google Patents
Improvements relating to the production of luminescent materialsInfo
- Publication number
- GB568789A GB568789A GB326443A GB326443A GB568789A GB 568789 A GB568789 A GB 568789A GB 326443 A GB326443 A GB 326443A GB 326443 A GB326443 A GB 326443A GB 568789 A GB568789 A GB 568789A
- Authority
- GB
- United Kingdom
- Prior art keywords
- cadmium
- added
- beryllium
- metasilicate
- proportion
- 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
568,789. Luminescent materials. TYRER & CO., Ltd., T., PEARCE SIGNS, Ltd., and SNOOK, H. H. Feb. 27, 1943, No. 3264. [Class 39 (i)] A fluorescent material comprises cadmium beryllium metasilicate with a suitable activator, preferably manganese. The molecular proportion of cadmium to beryllium may vary between 3 to 1, which gives a salmon colour, and 1 to 3, which gives a lilac colour ; with a proportion of 3 to 2, rose pink is obtained. Pure cadmium metasilicate is prepared by precipitating cadmium sulphate and sodium metasilicate. To this is added the desired proportion of silica and beryllium oxide and 1.5 per cent manganese dioxide. The mixture is heated for four hours at 950-1000‹ C. A second heating at 1000‹ C. with an added 10 per cent of silica may be employed. The sintered mass is then reduced to 50Á particles by a process of grinding, sieving and elutriation. The material may be excited by a mercury vapour discharge ; or by cathode rays, for which 10-100 parts per million of iron or nickel oxide may be added to reduce afterglow. The material may be mixed with other fluorescent materials and applied to coloured envelopes.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB326443A GB568789A (en) | 1943-02-27 | 1943-02-27 | Improvements relating to the production of luminescent materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB326443A GB568789A (en) | 1943-02-27 | 1943-02-27 | Improvements relating to the production of luminescent materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB568789A true GB568789A (en) | 1945-04-20 |
Family
ID=9755046
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB326443A Expired GB568789A (en) | 1943-02-27 | 1943-02-27 | Improvements relating to the production of luminescent materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB568789A (en) |
-
1943
- 1943-02-27 GB GB326443A patent/GB568789A/en not_active Expired
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| GB544160A (en) | Improvements in luminescent materials | |
| US2298968A (en) | Fluorescent coating and method of manufacture | |
| GB572771A (en) | Improvements in the production of fluorescent materials | |
| GB568789A (en) | Improvements relating to the production of luminescent materials | |
| US2244558A (en) | Fluorescent material | |
| US2245414A (en) | Fluorescent material | |
| GB568790A (en) | Improvements relating to the production of luminescent materials | |
| GB567494A (en) | Improvements relating to the production of luminescent materials | |
| US2558913A (en) | Lithium magnesium tungstate phosphor | |
| US2222509A (en) | Luminescent material | |
| US2615850A (en) | Manganese activated zinc lithium silicate phosphor | |
| GB558213A (en) | Improvements in and relating to fluorescent materials | |
| GB588295A (en) | Improvements in fluorescent products and methods of preparation thereof | |
| GB466503A (en) | Improvements in or relating to electric lamps comprising luminescent materials | |
| GB609711A (en) | Improvements in and relating to fluorescent material | |
| GB215347A (en) | Improvements in and relating to the manufacture of sintered tungsten and filaments made therefrom | |
| GB564449A (en) | Improvements in or relating to fluorescent low pressure mercury vapour electric discharge lamps | |
| GB663981A (en) | Method of preparing electron-emissive coating materials | |
| GB469731A (en) | Improvements in or relating to combinations of electric discharge devices with materials excited to luminescence by the electric discharge | |
| GB1120918A (en) | Rare earth activated strontium lithium germanate phosphors | |
| GB758940A (en) | Improvements relating to luminescent materials or phosphors | |
| GB712301A (en) | Improvements in or relating to luminescent materials | |
| GB521796A (en) | Improvements in and relating to luminescent materials for electric discharge lamps | |
| GB550744A (en) | Improvements in and relating to fluorescent materials | |
| GB569273A (en) | Improvements in luminescent materials |