GB721596A - Improvements in or relating to luminescent materials - Google Patents
Improvements in or relating to luminescent materialsInfo
- Publication number
- GB721596A GB721596A GB1364851A GB1364851A GB721596A GB 721596 A GB721596 A GB 721596A GB 1364851 A GB1364851 A GB 1364851A GB 1364851 A GB1364851 A GB 1364851A GB 721596 A GB721596 A GB 721596A
- Authority
- GB
- United Kingdom
- Prior art keywords
- heating
- manganese
- cdo
- oxides
- per cent
- 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
- C09K11/59—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing silicon
Landscapes
- Chemical & Material Sciences (AREA)
- Inorganic Chemistry (AREA)
- Engineering & Computer Science (AREA)
- Materials Engineering (AREA)
- Organic Chemistry (AREA)
- Luminescent Compositions (AREA)
Abstract
721,596. Luminescent materials. GENERAL ELECTRIC CO., Ltd., and McKEAG, A. H. May 28, 1952 [June 8, 1951], No. 13648/51. Class 39 (1) Luminescent material consists of a lithium cadmium silicate, composed of the oxides 'of lithium, cadmium and silicon in proportions such that the molecular ratio of Li 2 O: CdO is 1:1 and the molecular ratio of Li 2 O: SiO 2 is in the range of 1:1 to 1:2 inclusive, activated by manganese, so as to be excited by ultra-violet radiation of 2537 Š from a low pressure mercury vapour discharge lamp or by cathode rays from a cathoderay tube. Examples of materials are Li 2 O. CdO. SiO,. 1¢Li 2 O, 1¢CdO, 2SiO 2 and Li 2 O, CdO. 2SiO 2 , and materials having intermediate compositions or mixtures thereof. The materials can be prepared by heating together the oxides of Li, Cd and Si together with a compound of manganese, the oxides being either initially present as such or formed by chemical reaction or decomposition during the heating. The proportion of manganese present in the starting material is in the range of 0.01 per cent. to 5 per cent., preferably 0.01 per cent. to 1 per cent., by weight of the total weight of the oxides of Li, Cd and Si in the product of the heating. The heating is carried out at a temperature of the order of 850 C. to 1,000‹ C., and may be carried out in two or more steps, the material being ground between heating steps. The starting material may consist of silica, lithium carbonate, cadmium carbonate and either manganese carbonate or manganese chloride. Several specific examples are described. Specification 512,154 is referred to.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1364851A GB721596A (en) | 1951-06-08 | 1951-06-08 | Improvements in or relating to luminescent materials |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| GB1364851A GB721596A (en) | 1951-06-08 | 1951-06-08 | Improvements in or relating to luminescent materials |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| GB721596A true GB721596A (en) | 1955-01-12 |
Family
ID=10026853
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| GB1364851A Expired GB721596A (en) | 1951-06-08 | 1951-06-08 | Improvements in or relating to luminescent materials |
Country Status (1)
| Country | Link |
|---|---|
| GB (1) | GB721596A (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116891340A (en) * | 2023-07-12 | 2023-10-17 | 昆明理工大学 | Preparation method and control of Sm3+ ion-doped reversible photochromic cadmium-based glass |
-
1951
- 1951-06-08 GB GB1364851A patent/GB721596A/en not_active Expired
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN116891340A (en) * | 2023-07-12 | 2023-10-17 | 昆明理工大学 | Preparation method and control of Sm3+ ion-doped reversible photochromic cadmium-based glass |
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