JPS5489985A - Fluorescent substance - Google Patents
Fluorescent substanceInfo
- Publication number
- JPS5489985A JPS5489985A JP15728377A JP15728377A JPS5489985A JP S5489985 A JPS5489985 A JP S5489985A JP 15728377 A JP15728377 A JP 15728377A JP 15728377 A JP15728377 A JP 15728377A JP S5489985 A JPS5489985 A JP S5489985A
- Authority
- JP
- Japan
- Prior art keywords
- mol
- substance
- oxide
- fluorescent substance
- fluorescent
- 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)
Abstract
PURPOSE: To provide a fluorescent substance having enhanced efficiency and considerably improved life characteristics, and made of Eu-activated rare earth elements oxide contg. Si or Al in a specific range to the oxide.
CONSTITUTION: The fluorescent substance is an improved version of red luminous Eu-activated rare earth elements oxide, Re2O3/Eu (Re: one or more out of Y, La, Ga and Lu). The substance contains 10-5W10-2 mol of Si or Al and 10-2W 2×10-1 mol of Eu to 1 mol of the oxide. In order to produce the substance, for example, 0.95 mol of Y2O3, 0.05 mol of Eu2O3 and 10-6, 10-5, 10-4, 10-3, 10-2, 2×10-2 mol of SiO2 are mixed well and calcined at 1600°C for 5 hr. The initial lamp luminance of a fluorescent lamp using the substance and the luminance maintenance rate after lighting of 1000 hr can be improved remarkably by adding 10-5W 10-2 mol of Si to 1 mol of the substance as shown by the diagrams.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15728377A JPS6054354B2 (en) | 1977-12-28 | 1977-12-28 | fluorescent material |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15728377A JPS6054354B2 (en) | 1977-12-28 | 1977-12-28 | fluorescent material |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5489985A true JPS5489985A (en) | 1979-07-17 |
JPS6054354B2 JPS6054354B2 (en) | 1985-11-29 |
Family
ID=15646270
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15728377A Expired JPS6054354B2 (en) | 1977-12-28 | 1977-12-28 | fluorescent material |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS6054354B2 (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62172085A (en) * | 1986-01-24 | 1987-07-29 | Nichia Kagaku Kogyo Kk | Rare earth metal oxide fluorescent material for fluorescent lamp |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPH01162261U (en) * | 1988-04-25 | 1989-11-10 |
-
1977
- 1977-12-28 JP JP15728377A patent/JPS6054354B2/en not_active Expired
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62172085A (en) * | 1986-01-24 | 1987-07-29 | Nichia Kagaku Kogyo Kk | Rare earth metal oxide fluorescent material for fluorescent lamp |
Also Published As
Publication number | Publication date |
---|---|
JPS6054354B2 (en) | 1985-11-29 |
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