CN106957653A - One kind enhancing YAG:The method of Ce fluorescent material yellow emission intensity - Google Patents
One kind enhancing YAG:The method of Ce fluorescent material yellow emission intensity Download PDFInfo
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- CN106957653A CN106957653A CN201710201720.8A CN201710201720A CN106957653A CN 106957653 A CN106957653 A CN 106957653A CN 201710201720 A CN201710201720 A CN 201710201720A CN 106957653 A CN106957653 A CN 106957653A
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- C—CHEMISTRY; METALLURGY
- C09—DYES; PAINTS; POLISHES; NATURAL RESINS; ADHESIVES; COMPOSITIONS NOT OTHERWISE PROVIDED FOR; APPLICATIONS OF MATERIALS NOT OTHERWISE PROVIDED FOR
- C09K—MATERIALS FOR MISCELLANEOUS APPLICATIONS, NOT PROVIDED FOR ELSEWHERE
- C09K11/00—Luminescent, e.g. electroluminescent, chemiluminescent materials
- C09K11/08—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials
- C09K11/77—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals
- C09K11/7766—Luminescent, e.g. electroluminescent, chemiluminescent materials containing inorganic luminescent materials containing rare earth metals containing two or more rare earth metals
- C09K11/7774—Aluminates
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Abstract
Strengthen YAG the invention provides one kind:The method of Ce fluorescent material yellow emission intensity, is reducing agent using Al powder, by Al powder and YAG:Ce powder is contained in crucible boat respectively, described Al powder and YAG:Ce powder is separated, reducing agent Al powder and YAG:The mass ratio of Ce powder is（0.03~1）: 1, it is placed in vacuum tube furnace, under the conditions of 1000 DEG C, carries out heating 6 ~ 10 h.By with 5%H2‑95%N2, CO reducing process 1000 DEG C reduce 8 h YAG:The luminous intensity of Ce powder compares, and is all that 460nm blue lights are excited, YAG prepared by this method:Ce fluorescent material has stronger yellow emission intensity.
Description
Technical field
The invention belongs to chemical field, it is related to a kind of fluorescent material, specifically a kind of enhancing YAG:Ce fluorescent material gold-tinteds
The method of emissive porwer.
Background technology
White light LEDs are a kind of New Solid lighting sources, have small power consumption, effect compared with traditional incandescent lamp, fluorescent lamp
Rate height, environmental protection, energy-conservation, long lifespan, small volume, the remarkable advantage such as response is fast, colour rendering is good, it is environmentally friendly as new generation of green
Lighting source, with wide market prospects and huge economic results in society, has obtained the extensive concern of industry.
At present, mainly there are 3 kinds based on the LED modes for producing white light emission：（1）Polychromatic combination method, i.e., by red, green
Color, blue three mixture of colours produce white light, such as combination red, green, blue（RGB）Tricolor LED；（2）Excited using ultraviolet LED
RGB fluorescent material；（3）Yellow fluorescent powder is excited using blue LED.Yellow fluorescent powder is excited by blue chip（Cerium dopping
Yttrium aluminium garnet fluorescent powder, abbreviation YAG:Ce）The mode of white light is produced, is that the most frequently used white light LED combination scheme is simultaneously at present
Realize and commercially produced.It is used as fluorescence transition material, YAG:Ce quality directly determines the total quality of LED light source, because
This, researcher both domestic and external has carried out substantial amounts of research work, to improve YAG:Ce spectral quality and quality.As led to
Cross solid reaction process, sol-gel process, spray pyrolysis, coprecipitation, hydro-thermal method the method such as prepares and prepares different-shape
YAG:Ce.Also there is substantial amounts of research work by way of impurity or substitution, to improve YAG:Ce spectrum.In YAG:
In Ce reduction preparation process, conventional method is nitrogen hydrogen reduction method and carbothermy at present.Wherein carbothermic method is mainly profit
Produce CO method because excessive in local environment to be reduced in heating process with inorganic carbon dust.However, CO belongs to
Weak atmosphere reduction, in addition during the cladding of carbon dust, it is difficult to carry out quantitative setting to the fluorescent material prepared every time, causes experiment
Repeatability is poor.In addition, fluorescent material prepared by this method is often subject to remain the pollution and influence of carbon dust, fluorescence is directly resulted in
The outward appearance and luminescent properties of powder are affected.Nitrogen hydrogen reduction rule is, with a certain proportion of nitrogen/hydrogen mixed gas, to rely primarily on
In H2Reduction come the method for realizing the preparation of fluorescent material.This method reduction effect is relatively preferable, without carbon thermal reduction
In method the problems such as Carbon dust pollution, but there is also because of H simultaneously2Caused by leakage the problems such as security.Investigation based on more than, I
Yet there are no so far on using Al powder be reducing agent prepare YAG:Ce fluorescent material and the report for improving its spectral quality.
The content of the invention
For above-mentioned technical problem of the prior art, YAG is strengthened the invention provides one kind:Ce fluorescent material yellow emissions
The method of intensity, described this enhancing YAG:The method of Ce fluorescent material yellow emission intensity will solve YAG of the prior art:
The not high technical problem of Ce fluorescent material yellow emission intensity.
Strengthen YAG the invention provides one kind:The method of Ce fluorescent material yellow emission intensity, is reducing agent using Al powder,
By Al powder and YAG:Ce powder is contained in crucible boat respectively, described Al powder and YAG:Ce powder is separated, reducing agent Al powder with
YAG:The mass ratio of Ce powder is（0.03~1）: 1, it is placed in vacuum tube furnace, under the conditions of 1000 DEG C, is heated
6~10 h。
Further, in preparation process, separate, do not contact all the time.
Further, 8h is heated in vacuum tube furnace.
This enhancing YAG of the present invention:The method of Ce fluorescent material yellow emission intensity is to be used as reducing agent by Al powder, is led to
Contactless reduction treatment is crossed, YAG is improved:Ce fluorescent material yellow emission intensity.By with 5%H2-95%N2, CO reducing process
8 h YAG is reduced at 1000 DEG C:The luminous intensity of Ce powder compares（It is all that 460nm blue lights are excited）, YAG prepared by this method:Ce
Fluorescent material has stronger yellow emission intensity, so that it is preferably applied for white light LED part.
The present invention is compared with prior art, and its technological progress is significant.The present invention is compared to H2Reducing process, present invention side
Method is safe and reliable；Compared to CO reducing process, the inventive method is environment friendly and pollution-free, and harmful gas such as CO will not be produced in course of reaction
Body；And the inventive method is simple to operate, prepared YAG:The spectral quality of Ce fluorescent material is better than traditional H2Reducing process and
YAG prepared by CO reducing process:Ce fluorescent material.
Brief description of the drawings
Fig. 1 is the gained YAG of embodiment 1:The fluorescent emission spectrogram of Ce powder, blue light is excited down（460 nm）, the inventive method
The YAG of preparation:Ce and H2/N2It is prepared by reducing process and CO reducing process（With under the conditions of 1000 DEG C of processing 8h）YAG:Ce is luminous strong
Degree compares.
Embodiment
Embodiment 1：
According to Al powder and YAG:The mass ratio 0.1: 1 of Ce powder weighs 0.3g Al powder and 3g YAG:Ce powder, is respectively placed in crucible boat
In, it is placed in tube furnace, left and right is placed in parallel（Al powder and YAG:Ce is placed respectively, is separated, is not contacted all the time, and in crucible
The mutual centre distance of boat is no more than 10 cm）, whole system is evacuated to less than after 0.1MPa, heated at 1000 DEG C
After processing, 8 h of reduction, room temperature, the YAG after taking-up processing are naturally cooled to:Ce samples.Use XRF（HITACHI
F-7000）Its luminous intensity is tested, under the conditions of same test, the YAG prepared by the present invention:Ce powder is 5%H2-95%N2、CO
Reducing agent prepares YAG:1.5 times and 1.1 times of Ce powder energy emissive porwers（As shown in Figure 1）.
Claims (3)
1. one kind enhancing YAG:The method of Ce fluorescent material yellow emission intensity, it is characterised in that：The use of Al powder is reducing agent, by Al
Powder and YAG:Ce powder is contained in crucible boat respectively, described Al powder and YAG:Ce powder is separated, reducing agent Al powder and YAG:Ce
The mass ratio of powder is（0.03~1）: 1, it is placed in vacuum tube furnace, under the conditions of 1000 DEG C, carries out heating 6 ~ 10
h。
2. a kind of enhancing YAG according to claim 1:The method of Ce fluorescent material yellow emission intensity, it is characterised in that：
In preparation process, separate, do not contact all the time.
3. a kind of enhancing YAG according to claim 1:The method of Ce fluorescent material yellow emission intensity, it is characterised in that：
Heat 8h in vacuum tube furnace.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201710201720.8A CN106957653A (en) | 2017-03-30 | 2017-03-30 | One kind enhancing YAG:The method of Ce fluorescent material yellow emission intensity |
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| CN201710201720.8A CN106957653A (en) | 2017-03-30 | 2017-03-30 | One kind enhancing YAG:The method of Ce fluorescent material yellow emission intensity |
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| CN106957653A true CN106957653A (en) | 2017-07-18 |
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| CN201710201720.8A Pending CN106957653A (en) | 2017-03-30 | 2017-03-30 | One kind enhancing YAG:The method of Ce fluorescent material yellow emission intensity |
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Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666472A (en) * | 2013-08-31 | 2014-03-26 | 仪征市森泰化工有限公司 | Method for improving luminescent intensity and stability of synthesized YAG (yttrium aluminum garnet):Ce fluorescent powder |
| CN105038787A (en) * | 2015-07-01 | 2015-11-11 | 上海应用技术学院 | Ce, Tb and Mn-coactivated single-matrix phosphate white phosphor powder and preparation method thereof |
-
2017
- 2017-03-30 CN CN201710201720.8A patent/CN106957653A/en active Pending
Patent Citations (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103666472A (en) * | 2013-08-31 | 2014-03-26 | 仪征市森泰化工有限公司 | Method for improving luminescent intensity and stability of synthesized YAG (yttrium aluminum garnet):Ce fluorescent powder |
| CN105038787A (en) * | 2015-07-01 | 2015-11-11 | 上海应用技术学院 | Ce, Tb and Mn-coactivated single-matrix phosphate white phosphor powder and preparation method thereof |
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Application publication date: 20170718 |
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| RJ01 | Rejection of invention patent application after publication |