GB672518A - Improvements in and relating to calcium silicate phosphors and methods of preparing the same - Google Patents
Improvements in and relating to calcium silicate phosphors and methods of preparing the sameInfo
- Publication number
- GB672518A GB672518A GB19197/50A GB1919750A GB672518A GB 672518 A GB672518 A GB 672518A GB 19197/50 A GB19197/50 A GB 19197/50A GB 1919750 A GB1919750 A GB 1919750A GB 672518 A GB672518 A GB 672518A
- Authority
- GB
- United Kingdom
- Prior art keywords
- firing
- calcium silicate
- relating
- preparing
- methods
- 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
- C09K11/666—Aluminates; Silicates
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
672,518. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. Aug. 1, 1950 [Aug. 15, 1949]; No. 19197/50. Class 39 (i). A fluorescent composition of manganese and lead-activated calcium silicate is prepared by mixing compounds of calcium and silicon, which upon heating react to form calcium silicate, with activating proportions of manganese and lead compounds and firing the mixture at a temperature of approximately 1000-1200‹ C. with additions of a catalyst consisting of both a fluoride and a chloride of the group consisting of fluorides and chlorides of calcium and ammonium. Single or double firing may be employed. In the case of the latter a fluoride may be added before the first firing and a chloride added before the second firing. Specific examples are given. Specification 577,694 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19197/50A GB672518A (en) | 1950-08-01 | 1950-08-01 | Improvements in and relating to calcium silicate phosphors and methods of preparing the same |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB19197/50A GB672518A (en) | 1950-08-01 | 1950-08-01 | Improvements in and relating to calcium silicate phosphors and methods of preparing the same |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB672518A true GB672518A (en) | 1952-05-21 |
Family
ID=22074753
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB19197/50A Expired GB672518A (en) | 1950-08-01 | 1950-08-01 | Improvements in and relating to calcium silicate phosphors and methods of preparing the same |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB672518A (en) |
-
1950
- 1950-08-01 GB GB19197/50A patent/GB672518A/en not_active Expired
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