CN1254739A - Coated electrofluorescent powder and its coating method - Google Patents
Coated electrofluorescent powder and its coating method Download PDFInfo
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- CN1254739A CN1254739A CN 98122739 CN98122739A CN1254739A CN 1254739 A CN1254739 A CN 1254739A CN 98122739 CN98122739 CN 98122739 CN 98122739 A CN98122739 A CN 98122739A CN 1254739 A CN1254739 A CN 1254739A
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Abstract
A chemical process for generating a layer of oxide or compound film (or their composite film) on the surface of electrochromic material includes such technological steps as preparing colloidal coating liquid from organic compound containing Si, Ti, Zr and Al, organic conditioning agent, catalyst and water, putting electrochromic material in the colloidal coating liquid, vacuum drying and high-temp sintering. It can protect the electrochemic material (fluorescent powder) for longer service life.
Description
The invention belongs to the electroluminescent material technical field.
Electroluminescent fluorescent materials aging is to make the important factor that its long term device can not widespread use.Airborne moisture makes fluorescent material generation electrochemical reaction under the weathering process main source electric field action, causes luminous intensity decay rapidly at short notice, and the half-life reduces.Similar problem also has identical performance in other class fluorescent material.
The invention provides a kind of chemical process film-coating technique of using, use coating liquid to form oxide compound, compound or its composite membrane on the fluorescent powder surface.The fluorescent material that the present invention handles can effectively improve powder dispersity, stops moisture and intensive ultraviolet that the inside and outside foreign ion of powder is moved mutually.Use cost of the present invention low, be easy to produce in enormous quantities.Antiageing effect is obvious.Coating method of the present invention is equally applicable to photoluminescence powder, vacuum uv phosphor, the surface treatment of cathode-ray fluorescent powder.
The coating liquid that the present invention uses is meant the organic compound that contains silicon, titanium, zirconium, aluminium, adds catalyzer and water after organic solvent is regulated.In the organic compound of titanium, also can add the compound solution that contains barium, lead, as plumbic acetate, barium acetate.Keep forming in 10 hours-72 hours the colloid coating liquid at 30 ℃-80 ℃ behind the above-mentioned solution uniform mixing.
Above-mentioned one or more coating liquids and the electrofluor powder uniform mixing of handling are put into 120 ℃ of vacuum drying ovens.Drying is 48 hours under vacuum state.Can repeat said process 2-5 time according to film formed thin, thick requirement, in air, cause 500 ℃ of sintering 2 hours then, organic component is fully volatilized with 4-6 ℃ of/minute speed intensification.Make fluorescent powder speed be cooled to room temperature with freezing air after coming out of the stove.The present invention can form the compound oxides of silicon, titanium, zirconium, aluminium, lead titanate, barium titanate and complex thin film on the fluorescent powder surface.The phosphor powder granularity of coating of the present invention should be controlled at 15-50 μ m better effects.
The organic compound that uses among the present invention is meant and contains silicon, titanium, zirconium that the organic compound of aluminium is as tetraethoxy, butyl (tetra) titanate, titanium ethanolate, zirconium iso-propoxide, aluminum isopropylate etc.Organic regulator can use ethanol, methyl alcohol, acetone, Virahol, toluene etc., and organic regulator is controlled at (3-8) with the organic compound volume ratio: 1.
The catalyzer that uses among the present invention is meant nitric acid, acetic acid, hydrochloric acid, and usage quantity should make the solution pH value be controlled at 1-5.In the above-mentioned solution add-on of water be the organic compound volume 2-10 doubly.
The present invention uses the compound solution that contains lead, barium to be meant plumbic acetate, barium acetate.A kind of in above-mentioned two kinds of compounds joins in the organic compound of titanium, and titanium all is 1: 1 with mol ratio plumbous, barium.
The fluorescent material treatment process that the present invention uses is that fluorescent material was soaked 30 minutes at 60 ℃ of constant temperature with 36% hydrochloric acid, is washed till neutrality with clear water again and places 120 ℃ of vacuum-dryings 24 hours.This treatment process can make the fluorescent powder surface have attachment film basis preferably.
Because one deck oxide compound, compound film or its composite membrane are arranged on the electroluminescent powder surface, improved the dispersiveness of powder, effectively environment makes the inside and outside foreign ion of fluorescent powder not move mutually to the infringement of powder simultaneously around prevention moisture, the intensive ultraviolet etc.Improve the half-life of fluorescent material, extend to more than 2500 hours by original 1200 hours, antiageing effect is obvious.Although be coated with thin film at the powder surface bag, its luminosity remains unchanged, and emmission spectrum is also identical with former powder.Make electroluminescent device with the present invention and can simplify packaging process, reduce manufacturing cost.
Embodiments of the invention are as follows.
Example one:
Get tetraethoxy 3ml, add organic regulator ethanol 15ml, add entry 10ml, add catalyzer nitric acid and make PH=3.Under 40 ℃ of conditions, kept 24 hours, form the colloid coating liquid.Fluorescent material 30 grams of handling are evenly stirred with glue, and drying is 48 hours in 120 ℃ of vacuum drying ovens, and sintering is 2 hours in 500 ℃ of air.Cooling then.The half-life of this coated fluorescent powder is 2500 hours.
Example two:
Get metatitanic acid butyric acid 10ml, add organic regulator ethanol 40ml, add entry 30ml, add catalyzer hydrochloric acid and make PH=3, placed 10 hours, add fluorescent material 80 grams of handling, vacuum-drying 48 hours at 30 ℃.
Above-mentioned fluorescent material is joined among the Virahol 60ml that contains 2 gram aluminum isopropylates again, add entry 30ml, add hydrochloric acid and make PH=3.Evenly stir under back 30 ℃ of temperature and placed 10 hours.Drying is 48 hours in 120 ℃ of vacuum, burns 2 hours in 500 ℃ of air.
The fluorescent material that above-mentioned burning is crossed joins in the Virahol 60ml solution that contains 0.5 gram zirconium iso-propoxide, adds entry 40ml, adds hydrochloric acid and makes PH=3.
Evenly stir the back and placed 24 hours down, in 500 ℃ of air, burnt 2 hours again through vacuum-drying at 30 ℃.Above-mentioned coating powder keeps its original intensity, and the half-life reaches 3500 hours.
Example three:
Get butyl (tetra) titanate 30ml, add organic regulator ethanol 100ml, add entry 70ml, add barium acetate solution 15ml, under 40 ℃, evenly stir and placed 20 hours.Add fluorescent material 200 grams of handling and placed 120 ℃ of vacuum drying ovens dry 48 hours, sintering is 2 hours in 500 ℃ of air, and fluorescent material original intensity and the emmission spectrum handled with aforesaid method are constant, and the half-life is 3000 hours.
Claims (6)
1, a kind of coating method of electrofluor powder is characterized in that treated electrofluor powder is put into the organic colloid coating liquid, through vacuum-drying, and high temperature sintering in the air; The organic colloid coating liquid comprises organic compound and the organic regulator that contains silicon, titanium, zirconium, aluminium, catalyzer and water; The component of forming the organic colloid coating liquid is mixed the back to be kept 10 hours-72 hours under 30 ℃-80 ℃ temperature; The vacuum-drying temperature is 120 ℃, and the high temperature sintering temperature is 500 ℃; The catalyzer of organic colloid coating liquid is nitric acid, vinegar, hydrochloric acid, and the pH value of control solution is at 1-5; Organic regulator is (3-8) with the organic compound volume ratio: 1; The add-on of water is volume 2-10 a times of solution of organic compound.
2, the coating method of electrofluor powder according to claim 1, the organic compound that it is characterized in that silicon is a tetraethoxy; The organic compound of titanium is a butyl (tetra) titanate, metatitanic acid yttrium ester; The organic compound of zirconium is that the organic compound of zirconium iso-propoxide, aluminium is an aluminum isopropylate; Organic regulator is an ethanol, methyl alcohol, acetone, Virahol, toluene.
3, the coating method of electrofluor powder according to claim 2 is characterized in that adding in butyl (tetra) titanate, titanium ethanolate and contains barium, plumbous organic compound, and formation has barium titanate, lead titanate film or its composite membrane.
4, the coating method of electrofluor powder according to claim 3 is characterized in that barium, plumbous organic compound are barium acetate, plumbic acetate; Titanium is 1: 1 with barium or plumbous mol ratio in the organic compound of titanium.
5, the coating method of electrofluor powder according to claim 1, the coating electrofluor powder of making is characterized in that the surface of electrofluor powder has the compound film of silicon, titanium, zirconium, aluminium, oxide film or its composite membrane.
6, the coating electrofluor powder made of coating method according to claim 3 is characterized in that the surface of electrofluor powder has barium titanate, lead titanate film or its composite membrane.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98122739 CN1254739A (en) | 1998-11-24 | 1998-11-24 | Coated electrofluorescent powder and its coating method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 98122739 CN1254739A (en) | 1998-11-24 | 1998-11-24 | Coated electrofluorescent powder and its coating method |
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| Publication Number | Publication Date |
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| CN1254739A true CN1254739A (en) | 2000-05-31 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 98122739 Pending CN1254739A (en) | 1998-11-24 | 1998-11-24 | Coated electrofluorescent powder and its coating method |
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Cited By (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213399A (en) * | 2010-04-02 | 2011-10-12 | 鸿富锦精密工业（深圳）有限公司 | Light conversion component, light source module and projector using light source module |
| CN104910902A (en) * | 2015-06-01 | 2015-09-16 | 彩虹集团电子股份有限公司 | Surface treatment method of zinc-manganese silicate green fluorescent powder |
| 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 |
| CN107556783A (en) * | 2017-09-13 | 2018-01-09 | 佛山市力合通新材料有限公司 | The preparation method of cladding nanometer bismuth vanadate yellow pigment |
-
1998
- 1998-11-24 CN CN 98122739 patent/CN1254739A/en active Pending
Cited By (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102213399A (en) * | 2010-04-02 | 2011-10-12 | 鸿富锦精密工业（深圳）有限公司 | Light conversion component, light source module and projector using light source module |
| CN102213399B (en) * | 2010-04-02 | 2015-04-08 | 鸿富锦精密工业（深圳）有限公司 | Projector |
| CN104910902A (en) * | 2015-06-01 | 2015-09-16 | 彩虹集团电子股份有限公司 | Surface treatment method of zinc-manganese silicate green fluorescent powder |
| 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 |
| CN107556783A (en) * | 2017-09-13 | 2018-01-09 | 佛山市力合通新材料有限公司 | The preparation method of cladding nanometer bismuth vanadate yellow pigment |
| CN107556783B (en) * | 2017-09-13 | 2020-05-12 | 佛山市力合通新材料有限公司 | Preparation method of coated nano bismuth vanadate yellow pigment |
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