JPS5552378A - Preparation of fluorescent material - Google Patents
Preparation of fluorescent materialInfo
- Publication number
- JPS5552378A JPS5552378A JP12365778A JP12365778A JPS5552378A JP S5552378 A JPS5552378 A JP S5552378A JP 12365778 A JP12365778 A JP 12365778A JP 12365778 A JP12365778 A JP 12365778A JP S5552378 A JPS5552378 A JP S5552378A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent material
- calcining
- reducing atmosphere
- mixture
- ceo
- 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.)
- Pending
Links
Landscapes
- Luminescent Compositions (AREA)
Abstract
PURPOSE: To prepare a fluorescent material having improved luminance and crystallinity, and emitting green light by UV irradiation, by calcining a mixture of Ln2O3, CeO2, Tb4O7, and SiO2 containing KF in a reducing atmosphere, crushing the calcined product, and further calcining in a reducing atmosphere.
CONSTITUTION: A rare-earth silicate fluorescent material activated with Ce and Tb, of the formula (Ln is at least one rate earth element selected from Y, La Gd and Ln; 1×/103≤×≤3×/10; 3×/102≤y≤3×/10; 0.8≤×≤2.2), is prepared by (1) adding 0.02W0.25 mole, based on 1 mole of the fluorescent material, of KF to a mixture of Ln2O3, CeO2, Tb4O7 and SiO2, (2) calcining the mixture at 1200W 1400°C in a reducing atmosphere, (3) crushing the product, and (4) calcining again at 1100W1400°C in a reducing atmosphere.
COPYRIGHT: (C)1980,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12365778A JPS5552378A (en) | 1978-10-09 | 1978-10-09 | Preparation of fluorescent material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP12365778A JPS5552378A (en) | 1978-10-09 | 1978-10-09 | Preparation of fluorescent material |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5552378A true JPS5552378A (en) | 1980-04-16 |
Family
ID=14866035
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12365778A Pending JPS5552378A (en) | 1978-10-09 | 1978-10-09 | Preparation of fluorescent material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5552378A (en) |
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4565948A (en) * | 1981-06-18 | 1986-01-21 | Tokyo Shibaura Denki Kabushiki Kaisha | Fluorescent lamp |
US4629582A (en) * | 1981-06-16 | 1986-12-16 | Tokyo Shibaura Denki Kabushiki Kaisha | Green-emitting phosphor |
FR2584731A1 (en) * | 1985-07-12 | 1987-01-16 | Tungsram Reszvenytarsasag | Process for the manufacture of terbium-activated luminescent substances based on yttrium silicate |
JPS62104893A (en) * | 1985-10-31 | 1987-05-15 | Sony Corp | Production of small particle of fluorescent substance |
-
1978
- 1978-10-09 JP JP12365778A patent/JPS5552378A/en active Pending
Cited By (4)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
US4629582A (en) * | 1981-06-16 | 1986-12-16 | Tokyo Shibaura Denki Kabushiki Kaisha | Green-emitting phosphor |
US4565948A (en) * | 1981-06-18 | 1986-01-21 | Tokyo Shibaura Denki Kabushiki Kaisha | Fluorescent lamp |
FR2584731A1 (en) * | 1985-07-12 | 1987-01-16 | Tungsram Reszvenytarsasag | Process for the manufacture of terbium-activated luminescent substances based on yttrium silicate |
JPS62104893A (en) * | 1985-10-31 | 1987-05-15 | Sony Corp | Production of small particle of fluorescent substance |
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