GB745071A - Improvements in or relating to luminescent materials - Google Patents
Improvements in or relating to luminescent materialsInfo
- Publication number
- GB745071A GB745071A GB12922/53A GB1292253A GB745071A GB 745071 A GB745071 A GB 745071A GB 12922/53 A GB12922/53 A GB 12922/53A GB 1292253 A GB1292253 A GB 1292253A GB 745071 A GB745071 A GB 745071A
- Authority
- GB
- United Kingdom
- Prior art keywords
- per cent
- lamp
- weight
- discharge
- manganese
- 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
-
- 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
- C09K11/0855—Phosphates
- C09K11/0861—Phosphates with alkaline earth metals
- C09K11/0866—Phosphates with alkaline earth metals with halogens
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
745,071. Luminescent material; discharge lamps. PATENT-TREUHAND-GES. FUR ELEKTRISCHE GLUHLAMPEN. May 8, 1953 [May 21, 1952], No. 12922/53. Class 39 (1). A luminescent material, particularly for use in a low or high pressure mercury vapour discharge lamp, contains 15-60 per cent, preferably 30 per cent, magnesium fluorogermanate or magnesium titanate or magnesium arsenate activated with tetravalent manganese to be excited by long wave ultra-violet light, particularly 253.7 or 365 mÁ, admixed with an alkaline earth halogen phosphate, particularly 20-85 per cent, preferably 40 per cent, calcium halophosphate activated by manganese and antimony, with or without 20-85 per cent, preferably 30 per cent, calcium-strontium silicate activated by manganese and lead to prevent reduction of the tetravalent manganese. The magnesium fluorogermanate can correspond to the formula 3-3.5MgO . 0.5- IMgF 2 . 1GeO 2 : 0.01Mn, the calcium halo-phosphate to 3Ca 3 (PO 4 ) 2 . 1CaF 2 + up to 10 per cent by weight Mn + from 2-6 per cent by weight Sb, and the Ca-Sr-silicate can contain 1-5 mol. per cent SrO, about 1-3, preferably 2.4, per cent by weight of Mn and about 1-3, preferably 1.6, per cent by weight of Pb. The luminescent material can be coated on the inner side of the bulb of a low pressure mercury discharge lamp or on the inner side of an outer bulb enclosing a high pressure mercury vapour discharge tube, as shown in the drawing. A mica screen 7 protects the lamp base from heat. The discharge tube 1 is provided with argon and a quantity of mercury such that a pressure of about 3-5 atmospheres is developed during operation. Dimensions of the lamp are given. The outer bulb 8 may be partly spherical or pear or ellipsoidal-shaped. The lamp can be in the form of a mixed-light lamp having an incandescent coil within the outer bulb as a series resistance for the high-pressure discharge. The high-pressure tube and the coil are rated in such manner that the luminous flux from the tube is more intense than that from the coil.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| DE745071X | 1952-05-21 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB745071A true GB745071A (en) | 1956-02-22 |
Family
ID=6648189
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB12922/53A Expired GB745071A (en) | 1952-05-21 | 1953-05-08 | Improvements in or relating to luminescent materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB745071A (en) |
-
1953
- 1953-05-08 GB GB12922/53A patent/GB745071A/en not_active Expired
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