GB734426A - Improvements in or relating to fluorescent materials - Google Patents
Improvements in or relating to fluorescent materialsInfo
- Publication number
- GB734426A GB734426A GB2747752A GB2747752A GB734426A GB 734426 A GB734426 A GB 734426A GB 2747752 A GB2747752 A GB 2747752A GB 2747752 A GB2747752 A GB 2747752A GB 734426 A GB734426 A GB 734426A
- Authority
- GB
- United Kingdom
- Prior art keywords
- hours
- per cent
- milled
- barium
- refired
- 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
734,426. Luminescent material. GENERAL ELECTRIC CO., Ltd., HUNT, B.. E., and McKEAG, A. H. Oct. 8, 1953 [Oct. 31, 1952], No. 27477/52. Class 39 (1). In a barium-strontium disilicate activated by lead the molecular ratio of silica to other oxides is in the range 2: 1 to 3: 1 (e.g. 2.2) and the molecular ratio of strontia to baria is not greater than 20: 80 (e.g. 5: 95). The lead forms 0.1 to 10 per cent (e.g. 2.6 per cent) of the total material calculated as oxides, and activates the material to emit long-wave ultraviolet light when excited by light of 2537 A wavelength or electrons at 10,000 volts. Fluxes of alkaline earth halides may be used. In an example the starting materials are milled for 2 hours with about 4 per cent of a first flux of barium fluoride, fired in air for 3 hours, cooled, milled with 5 per cent of a second flux of hydrated barium chloride for ¢ hour, refired for 2 hours, cooled, milled for 1 hour, and refired for 2 hours, all firings being at 1050-1150‹ C. The material may be used as the first layer of a double-layer cathode-ray tube screen. The Provisional Specification describes the preparation of materials emitting blue light.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2747752A GB734426A (en) | 1952-10-31 | 1952-10-31 | Improvements in or relating to fluorescent materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB2747752A GB734426A (en) | 1952-10-31 | 1952-10-31 | Improvements in or relating to fluorescent materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB734426A true GB734426A (en) | 1955-08-03 |
Family
ID=10260227
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB2747752A Expired GB734426A (en) | 1952-10-31 | 1952-10-31 | Improvements in or relating to fluorescent materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB734426A (en) |
-
1952
- 1952-10-31 GB GB2747752A patent/GB734426A/en not_active Expired
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