GB728470A - Improvements in or relating to luminescent substances - Google Patents
Improvements in or relating to luminescent substancesInfo
- Publication number
- GB728470A GB728470A GB859/53A GB85953A GB728470A GB 728470 A GB728470 A GB 728470A GB 859/53 A GB859/53 A GB 859/53A GB 85953 A GB85953 A GB 85953A GB 728470 A GB728470 A GB 728470A
- Authority
- GB
- United Kingdom
- Prior art keywords
- grs
- lies
- luminescent
- temperature
- zno
- 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
- C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
- C09K11/706—Aluminates; Silicates
-
- 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
- C09K11/70—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing phosphorus
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
728,470. Luminescent materials. PHILIPS ELECTRICAL INDUSTRIES, Ltd. Jan. 12, 1953 [Jan. 15, 1952], No. 859/53. Drawings to Specification. Class 39 (1). A luminescent material, particularly for a luminescent screen in a discharge tube, having a luminescence which is stable at room temperature and which has a maximum emission at a wavelength between 6000 Š and 6200 Š is constituted by a fired reaction product consisting solely of Zn, P, Si, O 2 and Mn satisfying the formula xZnO.ySiO 2 .zP 2 O 5 : pMnO, where x: y lies between 2.2: 1 and 1: 1, p : x lies between 1 : 200 and 1: 5 and z : x lies between 1: 400 and 1 : 10. The material can be prepared by heating at a temperature between 700‹ C. and 875‹ C. in a reducing atmosphere containing water vapour, a mixture of ZnO, SiO 2 , MnO, or substances such as carbonates or nitrates from which the oxides can be obtained by heating, and ammonium phosphate. In the specific example described a material having the formula 2ZnO.1SiO 2 .0.03P 2 O 5 : 0.05MnO is prepared by mixing in water 2.03 grs. of ZnO, 0.75 grs. of SiO 2 , 0.15 grs. of MnSiO 3 and 0.15 grs. of (NH 4 ) 2 HPO 4 . The resultant suspension is ground in a ball-mill and dried at a temperature of about 100‹ C. The dry substance is intimately mixed and heated at about 800‹ C. for about 1¢ hours in an atmosphere of steam and hydrogen. Other luminescent materials can be mixed with the material formed.
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| NL728470X | 1952-01-15 |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB728470A true GB728470A (en) | 1955-04-20 |
Family
ID=19817883
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB859/53A Expired GB728470A (en) | 1952-01-15 | 1953-01-12 | Improvements in or relating to luminescent substances |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB728470A (en) |
-
1953
- 1953-01-12 GB GB859/53A patent/GB728470A/en not_active Expired
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