JPS5489984A - Fluorescent substance treating method - Google Patents
Fluorescent substance treating methodInfo
- Publication number
- JPS5489984A JPS5489984A JP15650577A JP15650577A JPS5489984A JP S5489984 A JPS5489984 A JP S5489984A JP 15650577 A JP15650577 A JP 15650577A JP 15650577 A JP15650577 A JP 15650577A JP S5489984 A JPS5489984 A JP S5489984A
- Authority
- JP
- Japan
- Prior art keywords
- fluorescent substance
- water
- substance
- alcohol
- required diameter
- 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 easily obtain a desired fluorescent substance without forming secondary particles by fractionating a fluorescent substance of a required diameter by water elutriation and evaporating the water in the presence of alcohol to dry the substance.
CONSTITUTION: A fluorescent substance of various diameters calcined and pulverized, e.g. self-activated zinc oxide is charged into an aq. soln. of a dispersant such as sodium hexametaphosphate, optionally stirred well, and subjected to water elutriation to fractionate some substance of a required diameter. After adding alcohol such as ethanol, the substance is heated to 100W130°C to evaporate the water and alcohol, thus obtaining the desired very dry fluorescent substance of the required diameter contg. no water and forming no secondary particles.
COPYRIGHT: (C)1979,JPO&Japio
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15650577A JPS5489984A (en) | 1977-12-27 | 1977-12-27 | Fluorescent substance treating method |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP15650577A JPS5489984A (en) | 1977-12-27 | 1977-12-27 | Fluorescent substance treating method |
Publications (1)
Publication Number | Publication Date |
---|---|
JPS5489984A true JPS5489984A (en) | 1979-07-17 |
Family
ID=15629220
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP15650577A Pending JPS5489984A (en) | 1977-12-27 | 1977-12-27 | Fluorescent substance treating method |
Country Status (1)
Country | Link |
---|---|
JP (1) | JPS5489984A (en) |
Cited By (2)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002249769A (en) * | 1996-09-20 | 2002-09-06 | Siemens Ag | Wavelength conversion casting material, method of producing the same, and light emission element |
CN105154061A (en) * | 2015-10-01 | 2015-12-16 | 上海洞舟实业有限公司 | Transparent damp-proof film wrapping method for electroluminescence powder |
-
1977
- 1977-12-27 JP JP15650577A patent/JPS5489984A/en active Pending
Cited By (5)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2002249769A (en) * | 1996-09-20 | 2002-09-06 | Siemens Ag | Wavelength conversion casting material, method of producing the same, and light emission element |
JP2008103756A (en) * | 1996-09-20 | 2008-05-01 | Siemens Ag | Casting composition and method for producing same, and luminescence device |
JP2009071336A (en) * | 1996-09-20 | 2009-04-02 | Siemens Ag | Led chip |
JP2012238909A (en) * | 1996-09-20 | 2012-12-06 | Osram Ag | Casting material, method of manufacturing the same, and light emitting element |
CN105154061A (en) * | 2015-10-01 | 2015-12-16 | 上海洞舟实业有限公司 | Transparent damp-proof film wrapping method for electroluminescence powder |
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