GB544763A - Improvements in and relating to fluorescent coating and methods of manufacture of such coatings - Google Patents
Improvements in and relating to fluorescent coating and methods of manufacture of such coatingsInfo
- Publication number
- GB544763A GB544763A GB3284/41A GB328441A GB544763A GB 544763 A GB544763 A GB 544763A GB 3284/41 A GB3284/41 A GB 3284/41A GB 328441 A GB328441 A GB 328441A GB 544763 A GB544763 A GB 544763A
- Authority
- GB
- United Kingdom
- Prior art keywords
- coating
- phosphor
- boric acid
- zinc
- suspension
- 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
- C09K11/02—Use of particular materials as binders, particle coatings or suspension media therefor
Landscapes
- Chemical & Material Sciences (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
- Vessels And Coating Films For Discharge Lamps (AREA)
Abstract
544,763. Luminescent materials. BRITISH THOMSON-HOUSTON CO., Ltd. March 11, 1941, No. 3284. Convention date, March 14, 1940. [Class 39 (i)] A fluorescent coating on an electric discharge device is obtained by (i) mixing with the fluorescent material a small amount of boric acid, ¢ to 15 per cent of the phosphor ; (ii) making a suspension in a binder such as nitrocellulose dissolved in amyl acetate (iii) coating the envelope with this suspension and then firing at about 600-700‹ C. to fuse the boric acid. The particle size of the phosphor may be from 1-50 microns. The coating may be used in lamps as described in U.S.A. Specification 2,182,723 having an argon and mercury filling, the argon at 4 mm. and the mercury at a pressure of 12 microns. The phosphor may be zinc-beryllium silicate, zinc silicate, magnesium tungstate or a daylight mixture of zinc beryllium silicate, magnesium tungstate and cadmium borate. In another method of attaching the coating a binder consisting of boric acid in glycerine is laid thinly on the envelope which is fired at 600‹ C. ; on to this a conventional suspension is poured, dried and then fired at 475‹ C.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| US544763XA | 1940-03-14 | 1940-03-14 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB544763A true GB544763A (en) | 1942-04-27 |
Family
ID=21991348
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB3284/41A Expired GB544763A (en) | 1940-03-14 | 1941-03-11 | Improvements in and relating to fluorescent coating and methods of manufacture of such coatings |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB544763A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0119041A1 (en) * | 1983-03-04 | 1984-09-19 | GTE Products Corporation | Lamp envelope having a luminescent material on the interior surface thereof, method of applying said material and material to be applied |
-
1941
- 1941-03-11 GB GB3284/41A patent/GB544763A/en not_active Expired
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP0119041A1 (en) * | 1983-03-04 | 1984-09-19 | GTE Products Corporation | Lamp envelope having a luminescent material on the interior surface thereof, method of applying said material and material to be applied |
| AU577522B2 (en) * | 1983-03-04 | 1988-09-29 | Gte Products Corporation | Lamp envelope coating |
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