CN1796486A - Fluorescent dye in high efficiency and method of preparation - Google Patents
Fluorescent dye in high efficiency and method of preparation Download PDFInfo
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- CN1796486A CN1796486A CN 200410102405 CN200410102405A CN1796486A CN 1796486 A CN1796486 A CN 1796486A CN 200410102405 CN200410102405 CN 200410102405 CN 200410102405 A CN200410102405 A CN 200410102405A CN 1796486 A CN1796486 A CN 1796486A
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Abstract
A process for preparing high-efficiency fluorescent powders, which utilizes the instant heating effect of microwaves or plasmas to improve the distribution of the lightening additive in the fluorescent powders as well as to strengthen the crystallization degree of the major component, while at the same time reduces the capture deficiency of the electrons or electron holes at the surface of the fluorescent powders to improve the lightening efficiency of the fluorescent powders. In the process, the fluorescent powders are ground to produce finer powders that have an increased surface area, which are then subjected to microwaves or plasmas to improve the surface crystal phase, thus further improving the lightening efficiency of the fluorescent powders. In addition, the surface of the fluorescent powders is covered with a film that has the same constitution as the major component of the fluorescent powders, which can form a good cover layer for the surface crystal phase after microwave or plasma treatment, thus elongating the service lift of the fluorescent powders as well as improving the lightening efficiency.
Description
Technical field
The present invention relates to a kind of fluorescent dye in high efficiency and method for making thereof, refer to a kind of use microwave or the plasma body moment phosphor surface of heating especially, improve the distribution and the crystallization degree of strengthening main composition of luminescent additive in the fluorescent material, to obtain fluorescent dye in high efficiency.
Background technology
Fluorescent powder is of many uses, according to the excitation energy form electric field, geseous discharge, field emission electron etc. is arranged, and along with high-quality demonstration and illumination need, the fluorescent material of high-level efficiency and long life becomes important material.The composition of fluorescent material is made up of main composition and luminous composition, and main composition provides good crystallization and energy field, and luminous composition produces specific luminescent spectrum adding generation transition of electron phenomenon under the energy excitation.
The prescription that high efficiency fluorescent material often forms with good main composition crystalline phase and the luminous composition that is evenly distributed, and the outward appearance of fluorescent powder particle obtains, the powder luminous efficiency that wherein has homogeneous size and circular appearance is best.Along with development of material technology, improvement has reached the suitable limit to fluorescent material character for composition prescription type and the control of powder particle outward appearance, how further to improve the luminous efficiency of fluorescent powder and becomes high efficiency illumination work-ing life and technique of display problem leaved for development.
Fluorescent powder has high crystallization degree, and diameter of particle generally can't be too little, yet the surface-area increase that particle diameter reduces to be produced but is to help more multi-photon generation, how to take into account small particle size and high crystalline for improving the important method of light-emitting phosphor efficient.Though use the fluorescent powder that chemical method can synthesis nano, often do not cause luminous efficiency low, and, cause the minimizing in work-ing life because of the effect of external excitation energy also easily produces metamorphism to nanometer grade powder because of crystallinity is good.Therefore though nanometer can improve surface-area, brightness with life-span aspect the Chang Wufa required in practicality satisfies the specification of using, and is the emphasis that fluorescent dye in high efficiency is developed so have the fine powder of high crystalline.Polishing is the most economical mode of miniaturization powder, the shearing force of using tiny abrading-ball high speed rotating to produce, and effectively the miniaturization powder is to nano level yardstick.So because of using high speed shear power to destroy powder particle, make the powder surface after the grinding be irregularly shaped and have many crystal defects, cause the powder of light-emitting phosphor efficient not as not grinding of miniaturization.Heat treated can be replied the crystal defect on surface, but for a long time thermal treatment causes powder that the phenomenon of nodule is arranged easily, make thermal treatment after particle diameter increase.Moreover fluorescent powder generally has high fusing point, therefore the temperature of heating often is difficult for making powder particle flattening surface and powder rounding, how sufficiently high temperature thermal treatment improves crystallization degree and outward appearance, can not cause the nodule phenomenon simultaneously, is fluorescent dye in high efficiency another difficulty to be overcome.
The tuorbillion optical property of fluorescent powder is improved normal adjustment and powder particle outward appearance with compositing formula and is obtained; as patent US6440329; EP1449905; JP2004099692; US2004066883; JP2000034479; JP20011081459 or the like relates to and forms the performance of adjusting raising fluorescent material; patent US6707249; JP2003147353; US6315924; JP2001131545; two kinds of complementary additives of uses such as US5643674 reach the effect that improves luminous efficiency; patent TW567222; US200436059; JP2002187717; JP10077469; US5851428 etc. control by size distribution and outward appearance and improve luminous efficiency; patent TW490481; US5525259; the oxide compound that stability in uses such as US5126166 are high is protected fluorescent powder to avoid being subjected to the influence of external energy and is made deterioration in characteristics, and wherein the powder surface coating with gamma-alumina is representative.Fluorescent powder size distribution and circular appearance have material impact to luminous efficiency, the diameter of particle that uses is all more than micron order, the fluorescent powder of nominal particle size has the chemical solution method of employing to make, as patent FR2771749 and JP200409383 etc., though can obtain the nano level fluorescent powder of homogeneous, its luminous efficiency presents relatively poor result because of crystallinity not as micron-sized particle.
Powder body micronizing increases surface-area, can improve the number of photons of generation in theory, that is higher luminous efficiency arranged, yet because the long-pending difficulties in dispersion that causes that increases of powder surface, because of producing, the powder nodule cause the increase of clean surface-area limited, and the particle diameter crystallinity deterioration phenomenon that diminishes and influenced, the luminous efficiency that makes whole powder is instead not as the fluorescent powder of big particle diameter.The powder handling of energy of plasma can improve the powder surface state, and then obtain circular powder and improve luminous efficiency, as the employed method of patent US5851428, but the condition of high temperature of plasma body causes big powder particle easily, therefore the fluorescent powder made from plasma method still reaches 10 microns particle diameter, the high area effect that can't utilize miniaturization to produce.The size of mechanical milling method control abrading-ball can be made particle diameter and be reached the following powder of 100 nanometers, so because of using high speed shear power to come the refinement powder particle, make the surface of powder present not specification situation, cause scattering of light and reduce luminous efficiency, in addition, there are many crystal defects on the new surface that shearing force forms, be easy to generate the capture effect in electronics or electric hole, luminous efficiency thereby can't effectively increase, can make fine powder though this also is the polishing of relatively low cost, the application on the fluorescent powder still not had the main cause of research and development report.The crystalline structure that fluorescent powder master composition uses generally has good weathering resistance; the material that belongs to wide energy gap in essence; after the adding of luminescent additive; produce that luminescence center can be subjected to the external excitation energy and luminous; but also reduce the weathering resistance of material simultaneously; so can use in theory and the protective layer of fluorescent material master composition identical materials as powder; but normal long-time high temperature action because of protective layer making processes; cause luminescent additive to diffuse in the protective layer, the protection effect of protective layer is reduced.
Summary of the invention
The purpose of this invention is to provide a kind of fluorescent dye in high efficiency and method for making thereof, grind the miniaturization powder to sub-micron grade, improve powder surface state and powder particle outward appearance, significantly increase the luminous efficiency of powder through the momentary action of microwave or plasma body.
Another purpose of the present invention provides a kind of fluorescent dye in high efficiency and method for making thereof; use the protective layer of the material identical as powder surface with fluorescent powder master composition; utilize the moment of microwave or plasma body to handle the protective layer that is not contained luminescent additive, reach the effect of improving work-ing life and luminous efficiency simultaneously.
A further object of the present invention provides a kind of fluorescent dye in high efficiency and method for making thereof, by the utilization that the zone of action of microwave or energy of plasma and material is controlled, can set up new powder upgrading and process for treating surface, and becoming provides the novel method of upgrading powder characteristic.
For reaching above-mentioned purpose, preferred embodiment of the present invention provides a kind of fluorescent dye in high efficiency, it includes: the surperficial coating layer that a fluorescent powder and a thickness are 0.1 to 1 micron, wherein should be coated on this fluorescent powder by the surface coating layer, and should handle through microwave or plasma heating by the surface coating layer.Wherein said fluorescent powder is this area any fluorescent powder material commonly used, yttrium aluminum garnet for example, and yttrium oxide etc., coating layer uses the material identical with it.
In the preferred embodiment of fluorescent dye in high efficiency method for making of the present invention, its step includes:
(a) provide a fluorescent powder, this fluorescent powder surface is coated with a coating layer identical with this fluorescent powder material; And
(b) heat this coating layer with a hertzian wave.
Wherein, if microwave treatment, then microwave treatment time is 1 to 10 minute, and with 3 to 5 minutes the bests, processing power was between between 100W to 2000W, with 600W to 900W the best; And if Cement Composite Treated by Plasma, then Cement Composite Treated by Plasma is the plasma flare of power 2000W to 4000W, its rate of feed will make the treatment time of powder in 1 minute.Improve the relation of effect about the luminous efficiency of treatment condition of the present invention and gained fluorescent material, can from accompanying drawing of the present invention, know and find out.
Because microwave and plasma body have the effect of heating fast, cooperate powder particle surface and the specific absorption difference of the inside to microwave energy, can design the effect that the heat energy major part is created in the powder surface layer, the characteristic of this constituency heating is the heat treated characteristic of microwave, and plasma body itself has thousands of degree temperature Celsius, has the effect that powder body melting is separated out again, suitably the control action of plasma is in the time of powder, can obtain concentration of energy causes melt surface to separate out the phenomenon generation again in powder surface, therefore use microwave and energy of plasma to carry out the thermal treatment of powder, can make the energy major part act on powder surface, reach the particle diameter increase phenomenon that surfaction does not but produce nodule.
Fluorescent powder is adding under the energy and luminous, therefore there be the deterioration problem of external energy to crystalline structure, the method that produces high brightness with high excitation energy often causes fluorescent material shortening in work-ing life, and the fluorescent material of high brightness is used the demand that exists the life-span to improve.The thermodynamically stable relatively crystalline phase of powder surface coating; can protect fluorescent material to reduce the injury of excitation energy; yet because crystal phase structure is different with fluorescent material master composition; though can improve work-ing life; the phenomenon that the luminosity reduction is arranged with the increase of coating layer thickness; therefore the present invention makes the tool defencive function and does not sacrifice the coating layer of luminous efficiency; grind the miniaturization method by cost-effective powder; and the microwave or the energy of plasma of constituency high-temperature heat treatment effect; cooperate specific powder surface layer coating, exploitation high-luminous-efficiency and the fluorescent powder of long life.
Description of drawings
Fig. 1 is a structural representation after the fluorescent dye in high efficiency preferred embodiment heat treated of the present invention.
Fig. 2 is the fluorescent dye in high efficiency first preferred embodiment luminous efficiency synoptic diagram of the present invention.
Fig. 3 is the effect synoptic diagram of the microwave treatment time of fluorescent dye in high efficiency second preferred embodiment of the present invention to degree of crystallinity and luminous efficiency improvement.
Fig. 4 is the effect synoptic diagram of the microwave treatment energy of fluorescent dye in high efficiency second preferred embodiment of the present invention to degree of crystallinity and luminous efficiency improvement.
Fig. 5 is that the luminous efficiency after the different microwave conditions of fluorescent dye in high efficiency second preferred embodiment of the present invention are handled is improved the situation synoptic diagram.
Fig. 6 is that the coating layer of surperficial coating different thickness of fluorescent dye in high efficiency second preferred embodiment of the present invention is through the luminosity rate of fall-off synoptic diagram of action of ultraviolet radiation after 1000 hours.
Fig. 7 improves synoptic diagram for the powder rate of feed of the use Cement Composite Treated by Plasma of fluorescent dye in high efficiency the 3rd preferred embodiment of the present invention to degree of crystallinity and the luminous efficiency of handling the back powder.
Fig. 8 is the preferable implementation step synoptic diagram of fluorescent dye in high efficiency method for making of the present invention.
Drawing reference numeral explanation: 1 fluorescent material; 100 fluorescent powders; 101 surperficial coating layers; 200 provide a fluorescent powder; 201 coating layers with hertzian wave heating fluorescent material; 202 obtain the fluorescent dye in high efficiency body.
Embodiment
For can to feature of the present invention, purpose and function have further cognitive with understand, cooperate now graphic detailed description as after.
As shown in Figure 1, it is a structural representation after the fluorescent dye in high efficiency preferred embodiment heat treated of the present invention, wherein this fluorescent material 1 includes: a fluorescent powder 100 and a surperficial coating layer 101, wherein should be coated on this fluorescent powder 100 by surface coating layer 101, and should surface coating layer 101 through a hertzian wave heat treated, formation has the fluorescent powder 100 and the surperficial coating layer 101 of identical main composition, below use the hertzian wave of microwave or plasma body to carry out heat treated respectively, and enumerate and use the different heat treated time, power or different surperficial coating layer thickness comparative descriptions it.
As shown in Figure 2, it is the fluorescent dye in high efficiency first preferred embodiment luminous efficiency synoptic diagram of the present invention, in this first preferred embodiment, use yttrium aluminum garnet as fluorescent material, utilize and grind the fluorescent material miniaturization of thinning method yttrium aluminum garnet, powder median size after grinding reaches the nanometer range of 60nm, size distribution be rather narrow (the about 10nm) that become, powder surface presents more irregular outward appearance because of the effect of high speed shear power, and the fluorescent material of miniaturization (2.45GHz behind microwave action, 400W, 5 minutes), slyness while median size increases to 120nm can to make powder surface become, the outward appearance of powder and crystal phase structure can obviously improve through the effect of microwave, show that microwave can carry out the upgrading of crystalline phase and outward appearance to the powder of miniaturization when true.Wherein the A curve is untreated yttrium aluminium garnet fluorescent powder, the B curve is for grinding the yttrium aluminium garnet fluorescent powder that miniaturization is handled, C curve is for grinding fine powder through the yttrium aluminium garnet fluorescent powder of microwave 400W effect after 5 minutes, relatively A curve and B curve can be learnt, though crystallinity deterioration through miniaturization process powder surface, but the luminous efficiency compensation of improvement is because of the loss in efficiency of crystallization variation because size distribution narrows down, so the luminosity after grinding is than the grinder is slightly not high, and learn that by C curve effect that microwave improves luminosity as shown in FIG., than the about luminosity that can increase by 8 times of the powder that does not grind, because microwave only improves crystalline texture and does not change composition, powder behind the microwave action has identical luminescent spectrum with untreated powder, main glow frequency does not change, and this also is one of advantage of microwave treatment.Experimental results show that by this raising of luminous efficiency can increase (being miniaturization) and transient energy via surface-area and handle and reach, also the proof particle diameter that time micron is following still can significantly improve luminous efficiency thus.
As shown in Figure 3, it is the effect synoptic diagram that the microwave treatment time of fluorescent dye in high efficiency second preferred embodiment of the present invention improves degree of crystallinity and luminous efficiency, and it uses the fluorescent powder of white light, and (main composition is yttrium oxide and BaMgAl
10O
17) be raw material, adopt the grinding thinning process identical with first preferred embodiment, powder after the miniaturization (particle diameter 0.5～0.8 μ m) is through the different time of the microwave action of 600W, the longitudinal axis of the corresponding degree of crystallinity of A curve wherein, degree of crystallinity illustrates with the ratio that the degree of crystallinity (value of a half width at main diffraction peak among the X-x-ray diffraction figure) to the powder that is untreated increases, the longitudinal axis of the corresponding luminous efficiency ratio of B curve, luminous efficiency is being the comparison foundation to the ratio that untreated powder was increased, the luminous intensity of various visible lights in the spectrum is carried out integration, and to contain capping long-pending to obtain spectrographic, utilizes the situation that the long-pending increase ratio explanation luminous efficiency of capping is improved that contains.By learning among the figure, luminous efficiency is obviously improved with powder degree of crystallinity and is increased, condition at 3 minutes is issued to maximum, and long afterwards microwave treatment time causes the increase of diameter of particle easily, and therefore the microwave treatment of longer time can't have the raising effect again to luminous efficiency.
As shown in Figure 4, it is the effect synoptic diagram of the microwave treatment energy of fluorescent dye in high efficiency second preferred embodiment of the present invention to degree of crystallinity and luminous efficiency improvement, it also is to use the fluorescent powder of white light, and the A curve is the longitudinal axis of corresponding degree of crystallinity also, the longitudinal axis of the also corresponding luminous efficiency ratio of B curve, wherein the treatment time of microwave is 3 minutes, result as Fig. 3, the luminous efficiency maximum is when microwave energy 600W, too high microwave energy causes the increase of diameter of particle easily, though therefore than untreated powder good crystallinity is arranged, luminous efficiency presents the trend of minimizing.
Shown in the result of synthesizing map 3 and Fig. 4, illustrating that microwave treatment can effectively be improved grinds the crystalline phase deterioration that thinning process causes, therefore can increase the luminous efficiency of miniaturization powder, but the overlong time or the energy of working as microwave treatment are excessive, can cause the powder effect generation of nodule growth again, offset the crystalline texture of microwave treatment generation and improve effect, so the microwave treatment fine powder must be set reasonable time and energy.
As shown in Figure 5, it is that luminous efficiency after the different microwave conditions of fluorescent dye in high efficiency second preferred embodiment of the present invention are handled is improved the situation synoptic diagram, A curve wherein, B curve and C curve are that the coating layer 0.2 μ m of fluorescent material is thick, microwave treatment time is respectively 1 minute, 3 minutes and 5 minutes, and that the D curve is the coating layer 0.5 μ m of fluorescent material is thick, microwave treatment time 5 minutes, the work-ing life that phosphor surface coating high heating power stability material such as aluminum oxide can improve fluorescent powder, but luminosity is had the phenomenon of reduction, so use of the present invention and of the surperficial coating of the identical material of fluorescent material master composition as powder, under different microwave energy treatment, degree of crystallinity and luminous efficiency all have the effect of improvement, though still have identical degree of crystallinity when wherein coating layer thickness is high, luminosity adds because of there is no light-emitting element in the coating layer, so can lower.With the increase of microwave treatment time, the microwave energy that produces maximum luminousing brightness reduces, and shows that microwave condition still has an appropriate value, is not more better.Microwave energy (product of power and time) is higher, produce clean surface-area descends except that causing easily as previously mentioned because of nodule, can make and formerly exist the light-emitting element in the fluorescent material to spread to surperficial coating layer, cause whole light-emitting element density loss, and then influence the luminosity of powder, so the result by Fig. 5 shows that when handling 5 minutes with 900W processing 3 minutes or 600～900W, the improvement degree of luminous efficiency is maximum.
As shown in Figure 6, it is that the coating layer of surperficial coating different thickness of fluorescent dye in high efficiency second preferred embodiment of the present invention is through the luminosity rate of fall-off synoptic diagram of action of ultraviolet radiation after 1000 hours, wherein the A curve is coating layer thickness 0.5 μ m, the B curve is coating layer thickness 0.2 μ m, the microwave treatment time of the coating layer of surface coating yttrium oxide is 5 minutes, after geseous discharge (ultraviolet ray) shines 1000 hours, test the situation of its luminosity decay, yttrium oxide has good stability behind the microwave energy crystallization, therefore the coating yttrium oxide can increase the work-ing life of fluorescent material, and Fig. 6 result shows that coating layer thickness increases, lower luminosity rate of fall-off is arranged after 1000 hours use, and microwave power 600W to 1200W is all had low rate of fall-off.Fluorescent material to coating layer thickness 0.2 μ m, high microwave power causes formerly existing light-emitting element in the fluorescent material to external diffusion easily, reduce the light-emitting element concentration of integral particles, reduce the yttrium oxide layer thickness of advantages of good crystallization simultaneously, cause the decrement of luminosity to increase.Therefore need control the former light-emitting element in the fluorescent material and the degree of crystallinity of coating layer of existing when using microwave energy treatment, avoid light-emitting element to external diffusion (more low-yield) and obtain between higher yttrium oxide coating layer (more high-energy), increase the luminosity and the microwave treatment effect in work-ing life during the selector contract.
As shown in Figure 7, its powder rate of feed for the use Cement Composite Treated by Plasma of fluorescent dye in high efficiency the 3rd preferred embodiment of the present invention is improved synoptic diagram to degree of crystallinity and the luminous efficiency of handling the back powder, wherein A curve and B curve are respectively the longitudinal axis of the corresponding luminous efficiency ratio of powder of coating layer thickness 0.2 μ m and 0.5 μ m, C curve and D curve are respectively the longitudinal axis of the corresponding degree of crystallinity of powder of coating layer thickness 0.2 μ m and 0.5 μ m, by among the figure as can be known, use plasma flare (2.45GHz, 3000W, in the atmosphere) handle the fluorescent powder of coating yttrium oxide, coating layer thickness is that 0.2 μ m has higher luminosity during than 0.5 μ m, because powder descended with the rate of feed increase by the time of torch high-temperature zone, cause the treatment time to reduce and reduce treatment effect, therefore under high rate of feed, degree of crystallinity and luminosity are on a declining curve, and be more obvious to the fluorescent material influence that coating 0.2 μ m is thick.Rate of feed can make powder be subjected to higher temperature action relatively because of existing the powder quantity in the torch few when low, formerly exists light-emitting element in the fluorescent material to the chance height of coating layer diffusion, causes luminosity to be not so good as the high person of rate of feed.Therefore the fluorescent material of Cement Composite Treated by Plasma coating yttrium oxide has optimal condition, for the powder of the coating layer thickness 0.2 μ m that shows among Fig. 7 under rate of feed 20g/min, present best degree of crystallinity and luminosity, no matter only the thickness of coating layer why, Cement Composite Treated by Plasma all can be improved fluorescent powder degree of crystallinity and the luminosity that grinds refinement.
Sum up the various embodiments described above as can be known, the treatment time of this microwave is 1 to 10 minute, the preferably is 3 to 5 minutes, the processing power of this microwave is between between 100W to 2000W, the preferably is 600W to 900W, and the rate of feed of this plasma body torch is in 1 minute, and the processing power of this plasma body torch is 2000W to 4000W.
As shown in Figure 8, it is the preferable implementation step synoptic diagram of fluorescent dye in high efficiency method for making of the present invention, and it includes the following step:
(a) provide a fluorescent powder 200, wherein this fluorescent powder surface is coated with the coating layer with this fluorescent powder same material, as for fluorescent powder and the employed material of coating layer, structure, thickness or the like, narrated in each above-mentioned preferable executing in the example, this just no longer giving unnecessary details more.
(b) with the coating layer 201 of hertzian wave heating fluorescent material, the hertzian wave of use microwave or plasma body heats the coating layer of fluorescent material, to carry out the heat treated of this coating layer, as for the power of microwave or plasma body, time or the like, narrated in each above-mentioned preferable executing in the example, this just no longer giving unnecessary details more.
(c) obtain fluorescent dye in high efficiency body 202, after coating layer process microwave or plasma heating are handled, just can obtain to have the fluorescent dye in high efficiency body of high work-ing life and luminous efficiency double effects.
In sum, a kind of fluorescent dye in high efficiency of the present invention and method for making thereof, grind the miniaturization powder to sub-micron grade, momentary action through microwave or plasma body improves powder surface state and powder particle outward appearance, significantly increase the luminous efficiency of powder, reach the effect of improving work-ing life and luminous efficiency simultaneously; The above, it only is preferred embodiment of the present invention, can not limit the scope of the invention with it, association obtains easily, such as: use differing materials luminescent powder, use condition of different hertzian wave, the heating of change hertzian wave or the like, the those skilled in the art that are familiar with this field are after comprehension spirit of the present invention, all can expect changing enforcement, be that all equalizations of doing according to claim of the present invention change and modification, will not lose main idea of the present invention place, also do not break away from the spirit and scope of the present invention, the former capital should be considered as further enforcement situation of the present invention.
Claims (23)
1, a kind of fluorescent dye in high efficiency, it includes:
One fluorescent powder; And
One surperficial coating layer, it is coated on this fluorescent powder, and should surface coating layer process hertzian wave heat treated.
2, fluorescent dye in high efficiency as claimed in claim 1, wherein this fluorescent powder and this surface coating layer are main composition identical materials.
3, fluorescent dye in high efficiency as claimed in claim 2, wherein the material of this fluorescent powder and this surface coating layer can be yttrium aluminum garnet.
4, fluorescent dye in high efficiency as claimed in claim 2, wherein the material of this fluorescent powder and this surface coating layer can be yttrium oxide.
5, fluorescent dye in high efficiency as claimed in claim 1, wherein this hertzian wave can be microwave.
6, fluorescent dye in high efficiency as claimed in claim 1, wherein this hertzian wave can be plasma body.
7, fluorescent dye in high efficiency as claimed in claim 5, wherein the treatment time of this microwave is 1 to 10 minute.
8, fluorescent dye in high efficiency as claimed in claim 7, wherein the treatment time of this microwave is 3 to 5 minutes.
9, fluorescent dye in high efficiency as claimed in claim 5, wherein the processing power of this microwave is 100 to 2000W.
10, fluorescent dye in high efficiency as claimed in claim 9, wherein the processing power of this microwave is 600W to 900W.
11, fluorescent dye in high efficiency as claimed in claim 6, wherein the rate of feed of this plasma body will make its treatment time be controlled in 1 minute.
12, fluorescent dye in high efficiency as claimed in claim 6, wherein the processing power of this plasma body is 2000W to 4000W.
13, a kind of fluorescent dye in high efficiency method for making, its step includes:
(a) provide a fluorescent powder, this fluorescent powder surface is coated with the coating layer with this fluorescent powder same material; And
(b) heat this coating layer with a hertzian wave.
14, fluorescent dye in high efficiency method for making as claimed in claim 13, wherein the material of this fluorescent powder of step (a) can be yttrium aluminum garnet.
15, fluorescent dye in high efficiency method for making as claimed in claim 13, wherein the material of this fluorescent powder of step (a) can be yttrium oxide.
16, fluorescent dye in high efficiency method for making as claimed in claim 13, wherein this hertzian wave of step (b) can be microwave.
17, fluorescent dye in high efficiency method for making as claimed in claim 16, wherein the treatment time of this microwave is 1 to 10 minute.
18, fluorescent dye in high efficiency method for making as claimed in claim 17, wherein the treatment time of this microwave is 3 to 5 minutes.
19, fluorescent dye in high efficiency method for making as claimed in claim 16, wherein the processing power of this microwave is 100 to 2000W.
20, fluorescent dye in high efficiency method for making as claimed in claim 19, wherein the processing power of this microwave is 600W to 900W.
21, fluorescent dye in high efficiency method for making as claimed in claim 13, wherein this hertzian wave of step (b) can be plasma body.
22, fluorescent dye in high efficiency method for making as claimed in claim 21, wherein the rate of feed of this plasma body will make its treatment time be controlled in 1 minute.
23, fluorescent dye in high efficiency method for making as claimed in claim 21, wherein the processing power of this plasma body torch is 2000W to 4000W.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618277A (en) * | 2011-01-06 | 2012-08-01 | 信越化学工业株式会社 | Phosphor particles and making method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102618277A (en) * | 2011-01-06 | 2012-08-01 | 信越化学工业株式会社 | Phosphor particles and making method |
| CN102618277B (en) * | 2011-01-06 | 2015-01-28 | 信越化学工业株式会社 | Phosphor particles and making method |
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