CN103834404A - Blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder - Google Patents
Blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder Download PDFInfo
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- CN103834404A CN103834404A CN201210524121.7A CN201210524121A CN103834404A CN 103834404 A CN103834404 A CN 103834404A CN 201210524121 A CN201210524121 A CN 201210524121A CN 103834404 A CN103834404 A CN 103834404A
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- fluorescent powder
- blue
- light
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- indigo plant
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
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Abstract
The invention provides a blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder Sm2O3. The fluorescent powder is characterized in that after selecting BaCO3 (barium carbonate), Gd2O3 (gadolinium oxide), TiO2 (titanium dioxide), WO3 (tungsten trioxide), Ce2O3 (cerium oxide) and Sm2O3 (samarium oxide), high-temperature ignition is performed by using water and ethanol as solvents, and the fluorescent powder is washed with a pickling solution and screened, so that the blue light photons irradiated on the fluorescent powder surface can be converted into yellow light photons. The application in white light LEDs (light-emitting diodes) comprises the following steps: the fluorescent powder is proportionally matched with silica gel, silicon resin or any other transparent material to form a fluorescent gel, and the fluorescent gel is coated on a blue light chip, so that part of blue light photons emitted by the blue light chip under the action of the electric field are directly radiated through the fluorescent gel, and part of the blue light photons are transformed by the fluorescent powder into yellow light to be radiated; and the blue light and yellow light are superposed to generate the required white light.
Description
Technical field:
The present invention relates to photoelectricity, particularly a kind of rare earth that can make blue photons be converted to gold-tinted photon mixes material.
Background technology:
Our the most frequently used white light LEDs is to combine by yellow fluorescent powder (blue photons can be converted to gold-tinted photon) and the gallium nitride chip that can send blue color spectrum, be called for short indigo plant and turn white light LEDs, the mode that realizes white light LEDs has multiple, it is but the blue mode that turns white light is comparatively ripe, also a kind of comparatively efficiently.
Indigo plant provided by the present invention turns white fluorescence material, the BaCO that raw material choose purity is 99.99%
3(barium carbonate), Gd
2o
3(gadolinium sesquioxide), TiO
2(titanium dioxide), WO
3(tungstic oxide), Ce
2o
3(cerium oxide), Sm
2o
3(Samarium trioxide), solvent is water and ethanol.
The chemical expression of prepared light-emitting film is: BaGd
1.6tiW
2o
11: Ce
0.1, Sm
0.1
Summary of the invention:
The invention has the beneficial effects as follows: can allow the blue photons that is irradiated to phosphor surface convert gold-tinted photon to, specifically in the application of white light LEDs, exactly this fluorescent material is mixed to the light transmissive material such as silica gel or silicone resin composition fluorescent glue according to certain ratio, then spread upon on blue chip, make the blue photons part that blue chip sends under electric field action see through fluorescent glue direct radiation out, some becomes gold-tinted and radiates after fluorescent material conversion, this two portions optical superposition of blue light and gold-tinted, has just produced our needed white light.
In order to solve the existing problem of background technology, the present invention is by the following technical solutions:
The invention provides a kind of rare-earth doped titanium tungstate indigo plant under blue-light excited and turn white emitting fluorescent powder Sm
2o
3, it is characterized in that, select BaCO
3(barium carbonate), Gd
2o
3(gadolinium sesquioxide), TiO
2(titanium dioxide), WO
3(tungstic oxide), Ce
2o
3(cerium oxide), Sm
2o
3(Samarium trioxide), solvent is water and ethanol, carries out tying acid solution after high temperature sintering and washs the fluorescent material sieving.
As preferentially: described rare-earth doped titanium tungstate indigo plant under blue-light excited turns white emitting fluorescent powder Sm
2o
3, to put into High Temperature Furnaces Heating Apparatus and carry out calcination at reducing atmosphere, calcination temperature is controlled at 1350 DEG C, and calcination soaking time is controlled at 5 hours.
As preferentially: described rare-earth doped titanium tungstate indigo plant under blue-light excited turns white emitting fluorescent powder Sm
2o
3, calcination is through grinding and sieving, washs by acid solution.
As preferentially: described rare-earth doped titanium tungstate indigo plant under blue-light excited turns white emitting fluorescent powder Sm
2o
3, it is characterized in that the dilute hydrochloric acid that acid solution wash concentration is 2% washs 3 times.
As preferentially: described rare-earth doped titanium tungstate indigo plant under blue-light excited turns white emitting fluorescent powder Sm
2o
3, it is characterized in that, the fluorescent material after washing was tied 160 DEG C of oven dry, and drying time is 3 hours.
As preferentially: described rare-earth doped titanium tungstate indigo plant under blue-light excited turns white emitting fluorescent powder Sm
2o
3, the fluorescent material after oven dry carries out calcination in reducing atmosphere again, temperature is 840 DEG C, the time again sieve after being controlled at 1 hour after fluorescent material finished product.
Brief description of the drawings:
Figure is the fluorescent material XRD phenogram under X ray.
Embodiment:
According to chemical formula BaGd
1.6tiW
2o
11: Ce
0.1, Sm
0.1stoichiometric ratio to take purity be 99.99% BaCO
3(barium carbonate), Gd
2o
3(gadolinium sesquioxide), TiO
2(titanium dioxide), WO
3(tungstic oxide), Ce
2o
3(cerium oxide), Sm
2o
3(Samarium trioxide) evenly mixes, and after evenly mixing, dries and packs in crucible, then puts into High Temperature Furnaces Heating Apparatus and carries out calcination at reducing atmosphere, and calcination temperature is controlled at 1350 DEG C, and calcination soaking time is controlled at 5 hours.After calcination, be yellow lumphy structure.Be about 5 μ m through pulverization process to fluorescent material medium particle diameter, then sieve, and carry out acid solution washing, adopt the dilute hydrochloric acid that concentration is 2% to wash 3 times.After washing, in stoving oven, suction filtration is dried powder, bake out temperature is controlled at 160 DEG C, drying time 3 hours, powder after oven dry is placed in High Temperature Furnaces Heating Apparatus and in reducing atmosphere calcination, calcination temperature is controlled at 840 DEG C, calcination soaking time is controlled at 1 hour, then passes through screen sizing, obtains fluorescent material finished product.
Combine the above, it is only preferred embodiment of the present invention, not the present invention is done to any pro forma restriction, although the present invention discloses as above with preferred embodiment, but not in order to limit the present invention, any those skilled in the art, do not departing within the scope of technical solution of the present invention, when can utilizing the technology contents of above-mentioned announcement to make a little change or being modified to the equivalent embodiment of equivalent variations, in every case be the content that does not depart from technical solution of the present invention, any simple modification of above embodiment being done according to technical spirit of the present invention, equivalent variations and modification, all still belong to the protection domain of technical solution of the present invention.
Claims (6)
1. the rare-earth doped titanium tungstate indigo plant under blue-light excited turns white emitting fluorescent powder Sm
2o
3, it is characterized in that, select BaCO
3(barium carbonate), Gd
2o
3(gadolinium sesquioxide), TiO
2(titanium dioxide), WO
3(tungstic oxide), Ce
2o
3(cerium oxide), Sm
2o
3(Samarium trioxide), solvent is water and ethanol, carries out tying acid solution after high temperature sintering and washs the fluorescent material sieving.
2. the rare-earth doped titanium tungstate indigo plant under blue-light excited described in claim 1 turns white emitting fluorescent powder Sm
2o
3, it is characterized in that, selecting purity is 99.99% BaCO
3(barium carbonate), Gd
2o
3(gadolinium sesquioxide), TiO
2(titanium dioxide), WO
3(tungstic oxide), Ce
2o
3(cerium oxide), Sm
2o
3(Samarium trioxide), solvent is evenly to mix after water and ethanol, carries out 1350 DEG C of high temperature sinterings in reducing atmosphere, be 5 hours combustion time.
3. turn white emitting fluorescent powder Sm according to the rare-earth doped titanium tungstate indigo plant under blue-light excited described in claim 1 and 2
2o
3, it is characterized in that, calcination is through grinding and sieving, washs by acid solution.
4. the rare-earth doped titanium tungstate indigo plant under blue-light excited according to claim 3 turns white emitting fluorescent powder Sm
2o
3, it is characterized in that the dilute hydrochloric acid that acid solution wash concentration is 2% washs 3 times.
5. the rare-earth doped titanium tungstate indigo plant under blue-light excited according to claim 1 turns white emitting fluorescent powder Sm
2o
3, it is characterized in that, the fluorescent material after washing was tied 160 DEG C of oven dry, and drying time is 3 hours.
6. the rare-earth doped titanium tungstate indigo plant under blue-light excited according to claim 1 turns white emitting fluorescent powder Sm
2o
3, the fluorescent material after oven dry carries out calcination in reducing atmosphere again, and temperature is 840 DEG C, and the time sieves after being controlled at 1 hour again.
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|---|---|---|---|
| CN201210524121.7A CN103834404A (en) | 2012-11-25 | 2012-11-25 | Blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder |
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| CN201210524121.7A CN103834404A (en) | 2012-11-25 | 2012-11-25 | Blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder |
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| CN103834404A true CN103834404A (en) | 2014-06-04 |
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ID=50798306
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834403A (en) * | 2012-11-25 | 2014-06-04 | 浙江浩翔光电科技有限公司 | Blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder Sm2O3 |
Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120931A (en) * | 2010-12-03 | 2011-07-13 | 深圳职业技术学院 | Red fluorophor and preparation method thereof |
| CN102791052A (en) * | 2011-05-16 | 2012-11-21 | 海洋王照明科技股份有限公司 | Titanium cerium co-doped barium tungstate light-emitting film, preparation method thereof and organic light-emitting device |
| CN103834403A (en) * | 2012-11-25 | 2014-06-04 | 浙江浩翔光电科技有限公司 | Blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder Sm2O3 |
-
2012
- 2012-11-25 CN CN201210524121.7A patent/CN103834404A/en active Pending
Patent Citations (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102120931A (en) * | 2010-12-03 | 2011-07-13 | 深圳职业技术学院 | Red fluorophor and preparation method thereof |
| CN102791052A (en) * | 2011-05-16 | 2012-11-21 | 海洋王照明科技股份有限公司 | Titanium cerium co-doped barium tungstate light-emitting film, preparation method thereof and organic light-emitting device |
| CN103834403A (en) * | 2012-11-25 | 2014-06-04 | 浙江浩翔光电科技有限公司 | Blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder Sm2O3 |
Non-Patent Citations (2)
| Title |
|---|
| QIHUA ZENG等: "Sr9R2-xEuxW4O24 (R＝Gd and Y) red phosphor for near-UV and blue InGaN-based white LEDs", 《SOLID STATE COMMUNICATIONS》, vol. 149, 25 March 2009 (2009-03-25), pages 880 - 883, XP026086743, DOI: doi:10.1016/j.ssc.2009.02.056 * |
| 张乐等: "Sm3+掺杂(Y，Tb)AG:Ce3+荧光粉的制备及光谱性能", 《无机化学学报》, vol. 27, no. 7, 31 July 2011 (2011-07-31), pages 1249 - 1254 * |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103834403A (en) * | 2012-11-25 | 2014-06-04 | 浙江浩翔光电科技有限公司 | Blue-light-excited rare-earth-doped titanotungstate blue-to-white fluorescent powder Sm2O3 |
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Application publication date: 20140604 |