JPS55157678A - Preparation of fluorescent substance - Google Patents
Preparation of fluorescent substanceInfo
- Publication number
- JPS55157678A JPS55157678A JP6502879A JP6502879A JPS55157678A JP S55157678 A JPS55157678 A JP S55157678A JP 6502879 A JP6502879 A JP 6502879A JP 6502879 A JP6502879 A JP 6502879A JP S55157678 A JPS55157678 A JP S55157678A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent substance
- alkali metal
- oxides
- mixture
- phosphates
- 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.)
- Granted
Links
Landscapes
- Luminescent Compositions (AREA)
- Compounds Of Alkaline-Earth Elements, Aluminum Or Rare-Earth Metals (AREA)
Abstract
PURPOSE: To obtain a fluorescent substance having a high efficiency and brightness, by replacing yttrium and terbium oxides party with phosphates thereof, and by incorporating specific amounts of sulfur and an alkali metal salt of flux with the mixture.
CONSTITUTION: 3W30 atomic percent of the total number of atoms of Ln and M are replaced by at least one compound of phosphates of Ln and M. The mixture of Ln and M oxides (or compounds capable of forming oxides by heating), the phosphate and a compound capable of forming an alkali metal sulfide is then in corporated with 0.7W2.2mol of an alkali metal salt and 2.2W7mol of sulfur based on one mole of the formed fluorescent substance. The resulting mixture is preferably calcined at 1,000W1,250°C to give the objective substance of formula (Ln is yttrium, gadolinium or lanthanum; M is terbium or praseodymiun; 0.00003≤x≤0.2).
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6502879A JPS55157678A (en) | 1979-05-28 | 1979-05-28 | Preparation of fluorescent substance |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP6502879A JPS55157678A (en) | 1979-05-28 | 1979-05-28 | Preparation of fluorescent substance |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS55157678A true JPS55157678A (en) | 1980-12-08 |
JPS5727147B2 JPS5727147B2 (en) | 1982-06-09 |
Family
ID=13275101
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP6502879A Granted JPS55157678A (en) | 1979-05-28 | 1979-05-28 | Preparation of fluorescent substance |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS55157678A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991013124A1 (en) * | 1990-03-01 | 1991-09-05 | Kasei Optonix, Ltd. | Process for producing rare earth oxysulfide phosphor |
-
1979
- 1979-05-28 JP JP6502879A patent/JPS55157678A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
WO1991013124A1 (en) * | 1990-03-01 | 1991-09-05 | Kasei Optonix, Ltd. | Process for producing rare earth oxysulfide phosphor |
Also Published As
Publication number | Publication date |
---|---|
JPS5727147B2 (en) | 1982-06-09 |
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