JPS5490876A - Fluorescent lamp - Google Patents
Fluorescent lampInfo
- Publication number
- JPS5490876A JPS5490876A JP15728177A JP15728177A JPS5490876A JP S5490876 A JPS5490876 A JP S5490876A JP 15728177 A JP15728177 A JP 15728177A JP 15728177 A JP15728177 A JP 15728177A JP S5490876 A JPS5490876 A JP S5490876A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent material
- bulb
- baked
- ppm
- hour
- 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
- Vessels And Coating Films For Discharge Lamps (AREA)
- Luminescent Compositions (AREA)
Abstract
PURPOSE: To improve crystallization of fluorescent material and thus increase brightness of fluorescent material, by admixing at least one of lithium, cesium and rubidium at the rate of 1 pmmW 100 ppm.
CONSTITUTION: A fluorescent lamp of this invention is made of bulb 1, electrodes 3 attached to the bulb 1, and fluorescent material coated over the inner surface of bulb 1. The fluorescent material is obtained by mixing 90 g of ammonium parawolframate and 0.19 g of magnesium, powdering the mixture for 30 minutes in a ball mill (magnetic ball), and baking it in a quarz crucible for one hour at 500°C. Fluorescent material thus obtained is powdered for 30 minutes in a ball mill and then it is baked 3 hours at 1000°C. Then, after addition of 2 g of Li2CO3 as flux and 20 cc of water, it is dried at 170°C. After drying, it is baked for one hour at 1000°C, washed with water, dried again, and passed through a 200-mesh screen. MgWO4 thus obtained contains Li at the rate of 5 ppm. The same treatment including the secondary baking is also applied to the mixture of 90g of ammonium parawolframate and 0.19g of Mg, and 0.3g of CsCO3 is added to the same as additive. Fluorescent material thus obtained is applied over the inner surface 2 of bulb 1, whereby brightness of the bulb 1 can be increased.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15728177A JPS5490876A (en) | 1977-12-28 | 1977-12-28 | Fluorescent lamp |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15728177A JPS5490876A (en) | 1977-12-28 | 1977-12-28 | Fluorescent lamp |
Publications (2)
Publication Number | Publication Date |
---|---|
JPS5490876A true JPS5490876A (en) | 1979-07-18 |
JPS619995B2 JPS619995B2 (en) | 1986-03-27 |
Family
ID=15646222
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15728177A Granted JPS5490876A (en) | 1977-12-28 | 1977-12-28 | Fluorescent lamp |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5490876A (en) |
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5515997A (en) * | 1978-07-21 | 1980-02-04 | Bfg Glassgroup | Method for cooling glass |
Families Citing this family (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS62257298A (en) * | 1986-04-30 | 1987-11-09 | Pioneer Electronic Corp | Diaphragm for speaker |
-
1977
- 1977-12-28 JP JP15728177A patent/JPS5490876A/en active Granted
Cited By (1)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JPS5515997A (en) * | 1978-07-21 | 1980-02-04 | Bfg Glassgroup | Method for cooling glass |
Also Published As
Publication number | Publication date |
---|---|
JPS619995B2 (en) | 1986-03-27 |
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