GB487520A - Improvements in combinations of gasfilled electric discharge devices and materials adapted to be excited to luminescence by them - Google Patents
Improvements in combinations of gasfilled electric discharge devices and materials adapted to be excited to luminescence by themInfo
- Publication number
- GB487520A GB487520A GB504037A GB504037A GB487520A GB 487520 A GB487520 A GB 487520A GB 504037 A GB504037 A GB 504037A GB 504037 A GB504037 A GB 504037A GB 487520 A GB487520 A GB 487520A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- titanium dioxide
- electric discharge
- luminescence
- discharge devices
- 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
- C09K11/67—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing refractory metals
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
Materials resulting from the sintering together of magnesium oxide and titanium dioxide are employed in conjunction with electric discharge devices, especially high or low-pressure mercury discharge tubes, to produce a red luminescence. A small quantity of chromium may be present as activator. The proportion of titanium dioxide may vary from 10 per cent to 53 per cent and from 1 to 5 per cent of beryllium oxide may be included in the mixture. The constituents are mixed and ground wet. The mixture is then filtered, dried, and moulded and is sintered at between 1400 and 1500 DEG C. resulting in a ceramic material which may be used to form part of the envelope of the discharge device or be applied thereto as a powder in a binding material. The preferred composition is 47 per cent titanium dioxide, 48 per cent of magnesium oxide, 5 per cent beryllium oxide, and ,5 per cent of chromium.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB504037A GB487520A (en) | 1937-02-19 | 1937-02-19 | Improvements in combinations of gasfilled electric discharge devices and materials adapted to be excited to luminescence by them |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB504037A GB487520A (en) | 1937-02-19 | 1937-02-19 | Improvements in combinations of gasfilled electric discharge devices and materials adapted to be excited to luminescence by them |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB487520A true GB487520A (en) | 1938-06-22 |
Family
ID=9788613
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB504037A Expired GB487520A (en) | 1937-02-19 | 1937-02-19 | Improvements in combinations of gasfilled electric discharge devices and materials adapted to be excited to luminescence by them |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB487520A (en) |
-
1937
- 1937-02-19 GB GB504037A patent/GB487520A/en not_active Expired
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