CN109827096A - A kind of laser lighting component and its manufacturing method using hollow alumina microballoon - Google Patents
A kind of laser lighting component and its manufacturing method using hollow alumina microballoon Download PDFInfo
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- CN109827096A CN109827096A CN201910062596.0A CN201910062596A CN109827096A CN 109827096 A CN109827096 A CN 109827096A CN 201910062596 A CN201910062596 A CN 201910062596A CN 109827096 A CN109827096 A CN 109827096A
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Abstract
A kind of laser lighting component and its manufacturing method using hollow alumina microballoon, is related to lighting area.Laser lighting component is made of the mixing of hollow alumina microballoon, glass powder with low melting point, fluorescent powder and volatile organic matter, the hollow alumina microballoon is as light scattering medium, the interior diameter of the hollow alumina microballoon is 50~500nm, overall diameter is 400nm~1 μm, and the melting range of the glass powder with low melting point is 500~650 DEG C.Method are as follows: hollow alumina microballoon, glass powder with low melting point, fluorescent powder and volatile organic matter are uniformly mixed, slurry is configured to；By slurry brushing in sapphire surface, after high temperature sintering, it is to be cooled, the flaky substance containing hollow alumina microballoon, fluorescent powder and low-melting glass composition sintered is removed from the sapphire surface of carrying to get to the laser lighting component for using hollow alumina microballoon.
Description
Technical field
The present invention relates to lighting area, more particularly, to a kind of laser lighting component using hollow alumina microballoon and its
Manufacturing method.
Background technique
In lighting area, as social whole progress constantly moves ahead.It is fired from initial by animal and plant fat, fossil
Material arrives incandescent lamp and gas-discharge lamp (fluorescent lamp), later in the nineties in last century, relatively energy-efficient LED white-light illuminating
It comes into vogue.Recently, since the cost of laser diode gradually decreases, performance tends towards stability, and uses laser as lighting source
It is increasingly becoming possibility.
Laser lighting divides visible light lasers illumination and infrared laser illumination.
Visible light lasers illumination, is divided into following two by principle: blue light excites fluorescent material to realize white-light illuminating or red green
Blue Laser synthesizing white laser or true color optical illumination.Infrared laser illumination is then applied to night vision more, the monitoring of night camera head is shone
It is bright.Wherein blue laser excitation fluorescent material realizes that white-light illuminating is the technology that mainstream technology is also functionization the most.
In fact, laser lighting technology and LED illumination are from principle of luminosity without too big difference.But LED light source is compared, is swashed
The problem of light efficiency decline that optical diode is not present, in illumination, laser lighting can realize very high brightness, i.e. laser lighting
Device has the super brightness (this while meaning that illuminating device will bear more heat radiations) for outclassing LED.But because laser
It is line light, directionality is very strong, and the hot spot color of obtained device is extremely uneven, and visual effect is also immature at present, need
It improves.
It needs exist for, it is emphasized that either which kind of laser lighting technology, for example to face two problems:
1. when on blue laser irradiation fluorescent material, (leads to since blue laser is converted white light complementary light by fluorescent material
Often be yellow light) transfer efficiency less than 100%, therefore quite a few laser energy can be converted to heat form, this will lead to
The temperature of fluorescent material rises, and hot quenching phenomenon can occur for the rising of the temperature of fluorescent material, and luminous intensity reduces；Simultaneously because
When being converted to yellow light from blue light, since, there are capacity volume variance, i.e. Stokes shift, this portion of energy is poor between blue light and yellow light
Also it can discharge in the form of heat, the temperature for also resulting in fluorescent material increases, and generates hot-quenching and goes out；Terrifically, when blue laser
When power is sufficiently high, in the unit time, the de excitation of centre of luminescence quantity living is less than the blue photons number reached in fluorescent material, shines
The luminous intensity of funerary objects part will not increase with the power of excitation blue laser, that is, so-called excitation Quenching occur.Therefore
The first problem that blue laser illumination must face is how that the temperature for reducing fluorescent material as much as possible increases.
2. laser is collimated light.When the blue laser of collimation is irradiated to phosphor surface, a hot spot is generated.This
Hot spot has a characteristic that the blue light brightness of spot center is extremely strong, visually partially blue；It is offset slightly from the position at center, is existed
The vision white light area of one yellow light and blue light ratio relative equilibrium；And for outermost hot spot, due to the intensity of blue laser
Lower, the yellow light accounting that fluorescent material is sent out is higher, at this point, being visually rendered as yellow light.While laser lighting device hot spot
" clock " shape is presented in light intensity on the whole, and intermediate brightness is high, and the brightness of surrounding gradually decreases.Therefore blue laser illumination is necessary
The Second Problem faced is how to guarantee the uniformity of illuminating device hot spot color and brightness as much as possible.
Laser lighting device can generate a large amount of heat in use and cause luminescent substance that hot-quenching occurs and go out, it is contemplated that
Glass state material (or ceramic masses) has good heat conduction and heat radiation ability, therefore in most cases, the fluorescence of laser lighting
Substance is usually glassy state (or ceramic form).The preparation method of glassy state fluorescent material be using glass powder with low melting point with it is glimmering
After evenly mixing, tabletted shape is sintered light powder at a certain temperature, and glass powder melts, and after cooling, fluorescent powder grain is equably
It is distributed in piece shape, obtains the vitreousness light tiles containing fluorescent powder.And the fluorescent material of ceramic form, generally use curtain coating
Method or pressure sintering etc. obtain.In view of the cost problem of manufacture, glass state material is technology mainstream.
Either which kind of method obtains fluorescent material, although heat conduction and heat radiation ability all with higher, can not all solve
The non-uniform problem of laser lighting device hot spot.Therefore, in order to solve this problem, can be manufactured in fluorescent material appropriate micro-
Hole.Such as by glass powder with low melting point, fluorescent powder and organic particle or will such as magnesium aluminate spinel transparency material and fluorescent powder
It is uniformly mixed with organic particle, is then pressed into type, finally by sintering, obtains the fluorescent material containing a certain amount of micropore.
Scattering using micropore to light, by the blue laser " breaing up " of collimation, so that laser lighting device generates hot spot more evenly.On
State method has embodiment in Patent Documents 1 to 4, and which is not described herein again.It is to be noted that the presence of micropore can destroy material
The continuity of material reduces the mechanical strength and heat dissipation i.e. heating conduction of material.
And hollow alumina microballoon is that a kind of performance is extremely stable, thermally conductive energy-absorbing evokes good and hollow material, to light
Line has extremely strong scattering property.In general, hollow alumina microballoon is for doing heat-barrier material.
In short, currently, can not all be solved the problems, such as follows in all public technology schemes: realizing blue laser illumination
Component used in fluorescent material, be responsible for the function that luminous part assumes responsibility for breaing up simultaneously the blue laser (by manufacturing micropore)
Can, therefore heat dissipation, thermally conductive and uniform laser facula problem cannot be balanced simultaneously.Although i.e. glassy state either ceramic form
Fluorescent material heat dissipation and thermally conductive relatively strong, has positive effect for resisting hot-quenching and going out, but when in order to break up blue laser, so that swashing
The hot spot of optical illumination device generation more evenly, and the micropore manufactured in the fluorescent material of the either ceramic form of glassy state, though
The laser of collimation can be so broken up, but the fluorescent material heat dissipation and the capacity of heat transmission of the either ceramic form of glassy state can be reduced, together
When reduce the either ceramic form of glassy state fluorescent material mechanical strength.I.e. all at present disclosed technical solutions, all
It is the technical solution of compromise, can only accomplishes to control pore density as much as possible, allows in the uniform situation of hot spot, fluorescent material dissipates
Heat and heating conduction, which drop to, is unlikely to unacceptable degree, but this is before being with the light efficiency for reducing laser lighting device entirety
It mentions.
Bibliography:
Patent document 1:B Hope, P receive this, V Larry Hagman, and Y grams, W shellfish Yale, polycrystalline ceramics, its preparation
Method and purposes, application number: 201480006289.6.
Patent document 2:JF section rope, pungent gram of N, luminescent ceramic converter and preparation method thereof application number:
201180007665.X.
Patent document 3:P Si meter Te, HH Bechtel, the Basel W are special, BS Shi Laienmache, electroluminescent
Luminescent device, application number: 200780010049.3.
Patent document 4:JG wins thunder Kemp, and OJ Steger is graceful, the west HAM Fan Haer, JFM
Lay is gloomy, for being scattered in the optical ceramics of light emitting diode by the light of controlled porosity, application number: 200980102274.9.
Summary of the invention
The first object of the present invention is to provide a kind of laser lighting component using hollow alumina microballoon.
The second object of the present invention is to provide a kind of manufacturing method of laser lighting component using hollow alumina microballoon.
The laser lighting component using hollow alumina microballoon is by hollow alumina microballoon, glass powder with low melting point, glimmering
Light powder and volatile organic matter mixing composition, the hollow alumina microballoon is as light scattering medium, the hollow alumina
The interior diameter of microballoon is 50~500nm, and overall diameter is 400nm~1 μm, the melting range of the glass powder with low melting point is 500~
650℃。
The hollow alumina microballoon is warm hollow alumina microballoon.
The hollow alumina microballoon, glass powder with low melting point, fluorescent powder and volatile organic matter mass ratio can be (0.1 ︰
20 ︰, 80 ︰ 10)~(1 ︰, 8 ︰, 2 ︰ 2).
The fluorescent powder can be Y3Al5O12:Ce。
Terpinol etc. can be used in the volatile organic matter.
Laser lighting component is excited using blue laser.Blue laser wavelength is 420~480nm.
The manufacturing method of the laser lighting component using hollow alumina microballoon the following steps are included:
1) hollow alumina microballoon, glass powder with low melting point, fluorescent powder and volatile organic matter are uniformly mixed, preparation is slurried
Material；
2) to be cooled by slurry brushing after sapphire surface, high temperature sintering, burning is removed from the sapphire surface of carrying
Tied containing hollow alumina microballoon, fluorescent powder and low-melting glass composition flaky substance to get to use hollow oxidation
The laser lighting component of aluminium microballoon.
In step 1), the quality of the hollow alumina microballoon, glass powder with low melting point, fluorescent powder and volatile organic matter
Than for (0.1 ︰, 20 ︰, 80 ︰ 10)~(1 ︰, 8 ︰, 2 ︰ 2)；Terpinol etc. can be used in the volatile organic matter.
In step 2), the thickness of the slurry brushing can be 50~500 μm；The temperature of the high temperature sintering can be 500
~650 DEG C.
The present invention provides a kind of laser lighting component and its manufacturing method using hollow alumina microballoon, in the component
Include hollow alumina microballoon.Specific manufacturing method is by hollow alumina microballoon and glass powder with low melting point and fluorescent powder according to one
Certainty ratio is uniformly mixed, and wherein the mass ratio of hollow alumina microballoon, glass powder with low melting point, fluorescent powder and volatile organic matter is
It is changed between (0.1 ︰, 20 ︰, 80 ︰ 10)~(1 ︰, 8 ︰, 2 ︰ 2), slurry is then brushed to sapphire surface, is finally burnt at high temperature
Knot, can be obtained the laser lighting component containing hollow alumina microballoon.In the laser lighting component, hollow alumina microballoon has
The effect of extremely strong light scattering, can significantly provide the uniformity of laser lighting component hot spot.
Compared with prior art, light fixture of the invention has completely new structure, and manufacturing process difficulty is minimum, thermal conductivity
Conventional structure is significantly better than with laser facula scattering property.
In the present invention, hollow alumina microballoon is applied to field of laser illumination for the first time, it is micro- has expanded hollow alumina
The application field of ball, simultaneously for the design of laser lighting component, the invention proposes a kind of completely new methods, i.e. light fixture
In, use hollow alumina microballoon.Using the stronger heating conduction of the length direction of hollow alumina microballoon and radial direction to light
Excellent scattering power, in laser lighting component, realization breaks up blue laser, keeps hot spot more uniform, and can improve component
Thermally conductive, heat dissipation performance, heat dissipation, thermally conductive and laser light cannot be balanced simultaneously by completely, thoroughly solving in prior art
The uniform problem of spot.This new method is that inventor has found for the first time, is expected to promote the functionization of laser lighting.
Detailed description of the invention
Fig. 1 is that the structure composition of the laser lighting assembly embodiment of the present invention using hollow alumina microballoon is illustrated
Figure.
Fig. 2 is correlated colour temperature distribution map obtained in comparative example 1 of the present invention.
Fig. 3 is correlated colour temperature distribution map obtained in comparative example 2 of the present invention.
Fig. 4 is correlated colour temperature distribution map obtained in the embodiment of the present invention 1.
Specific embodiment
Clear, complete explanation is carried out to technical solution of the present invention below in conjunction with drawings and examples.
The present invention provides a kind of laser lighting components and its manufacturing method using hollow alumina microballoon.That is, by empty
Heart aluminum oxide micro-sphere and glass powder with low melting point and fluorescent powder and volatile organic matter are uniformly mixed according to a certain percentage, and preparation is slurried
Material, is then brushed to sapphire surface for slurry, is finally sintered at high temperature.After cooling, from the sapphire surface of carrying
The flaky substance formed containing hollow alumina microballoon and fluorescent powder and low-melting glass sintered is removed, laser can be obtained
Light fixture.
As shown in Figure 1, using hollow alumina microballoon 03 as light scattering medium, fluorescent powder in laser lighting component 04
01 and the effect that is melted due to glass powder with low melting point of hollow alumina microballoon 03, it is evenly distributed among 02 substance of glassy state.
Hollow alumina microballoon 03, glass powder with low melting point, fluorescent powder 01 and volatile organic matter mass ratio be (0.1 ︰
20 ︰, 80 ︰ 10)~(1 ︰, 8 ︰, 2 ︰ 2).In some embodiments provided by the invention, the hollow alumina microballoon 03 and low melting point
The mass ratio of glass powder and fluorescent powder 01 and volatile organic matter is 1 ︰, 10 ︰, 10 ︰ 2.
The interior diameter of hollow alumina microballoon 03 is between 50~500nm, and overall diameter is between 400nm~1 μm.In this hair
In some embodiments of bright offer, preferably interior diameter is 100nm, overall diameter is 450nm hollow alumina microballoon.
Laser lighting component is excited using blue laser.
Blue laser wave-length coverage is 420~480nm.
The melting range of glass powder with low melting point is between 500~650 DEG C.In some embodiments provided by the invention, low
The fusing point of melting glass frit is preferably 600 DEG C.
Fluorescent powder 01 is Y3Al5O12:Ce。
Laser lighting component is excited using blue laser.Preferably, blue laser wave-length coverage is 420~480nm.?
In some embodiments provided by the invention, blue laser wavelength is preferably 450nm.
Volatile organic matter is terpinol.
The brushing with a thickness of between 50~500 μm.In some embodiments provided by the invention, the thickness of brushing is excellent
It is selected as 100 μm.
The temperature of high temperature sintering is between 500~650 DEG C.In some embodiments provided by the invention, high temperature sintering
Temperature is preferably 600 DEG C.
The present invention is dissipated using the stronger heating conduction of length direction of hollow alumina microballoon with radial excellent to light
Ability is penetrated, in laser lighting component, realization breaks up blue laser, keeps hot spot more uniform, and can improve the thermally conductive, scattered of component
Hot property.
In order to further illustrate the present invention, with reference to embodiments to a kind of reflective blue laser photograph provided by the invention
Bright component is described in detail.
Material used in following comparative example or embodiment or reagent are commercially available.
Comparative example 1
By Y3Al5O12: Ce fluorescent powder and glass powder with low melting point and volatile organic matter mix according to 5 ︰ of mass ratio, 5 ︰ 1
It is even.Then above-mentioned slurry is brushed on sapphire substrate, brushing with a thickness of 100 μm, substrate with a thickness of 1mm.Then will
The substrate for carrying slurry is sintered under high temperature, and sintering temperature is 600 DEG C, sintering time 30min, after sample is cooling, from
Sapphire surface removes glassy mass.
The device is irradiated using the blue laser that power is 10W, launch wavelength is 450nm, from luminescent layer incidence.Hot spot
The measurement result of uniformity is shown in Fig. 2.As can be seen that due to the structure (micropore) of not no scattering laser, when deviateing spot center
Distance increases a little, and the correlated colour temperature on device for position is substantially reduced, i.e. the device that obtains of this method, hot spot uniformity compared with
Difference.The thermal coefficient and compression strength of device are shown in Table 1.Due in device without manufacture micropore, the thermal coefficient of device and
Compression strength and luminous intensity are higher.
Comparative example 2
By polyethylene microballoon (outer dia is 0.45 μm, and inflated diameter is 0.1 μm), Y3Al5O12: Ce fluorescent powder and eutectic
Point glass powder and volatile organic matter are uniformly mixed according to 1 ︰ of mass ratio, 10 ︰, 10 ︰ 2.Then above-mentioned slurry is brushed to sapphire
On substrate, brushing with a thickness of 100 μm, substrate with a thickness of 1mm.Then the substrate for carrying slurry is sintered under high temperature,
Sintering temperature is 600 DEG C, sintering time 30min, after sample is cooling, removes glassy mass from sapphire surface.
The device is irradiated using the blue laser that power is 10W, launch wavelength is 450nm, from luminescent layer incidence.Hot spot
The measurement result of uniformity is shown in Fig. 3.As can be seen that due to there is the structure of scattering laser (micropore) to exist, when deviation spot center
Distance increase a little, there is certain reduction in the correlated colour temperature on device for position, but has compared with the effect of comparative example 1 and change
It is kind.But due to using polyethylene microballoon, which is organic matter, and certain carbon distribution can be generated after sintering, causes device color inclined
Black, the luminous intensity of device decreases.I.e. the device of this method acquisition, hot spot uniformity increase to compared with comparative example 1.Device
The thermal coefficient and compression strength and luminous intensity of part are shown in Table 1.Due to there is micropore in device, the thermal coefficient of device and anti-
Compressive Strength is substantially reduced height compared with compared with comparative example.
Embodiment 1
By hollow alumina microballoon, Y3Al5O12: Ce fluorescent powder and glass powder with low melting point and volatile organic matter are according to quality
It is uniformly mixed than 1 ︰, 10 ︰, 10 ︰ 2.Then above-mentioned slurry is brushed on sapphire substrate, brushing with a thickness of 100 μm, substrate
With a thickness of 1mm.Then the substrate for carrying slurry being sintered under high temperature, sintering temperature is 600 DEG C, sintering time 30min,
After sample is cooling, glassy mass is removed from sapphire surface.
The device is irradiated using the blue laser that power is 10W, launch wavelength is 450nm, from luminescent layer incidence.Hot spot
The measurement result of uniformity is shown in Fig. 4.As can be seen that due to there is the structure of hollow aluminum oxide micro-sphere (micropore) to exist, when deviation light
The distance at spot center increases very much, and the correlated colour temperature chance on device for position does not have any change, i.e. this method obtains
Device, hot spot uniformity is fabulous.The thermal coefficient and compression strength and luminous intensity of device are shown in Table 1.Due to (shining in device
Layer) micropore is not manufactured, therefore the thermal coefficient of device and compression strength are higher.It, should due to using hollow alumina microballoon
Material is inorganic matter organic matter, carbon distribution will not be generated after sintering, the luminous intensity of device is significantly increased compared with comparative example 2.
The test data of table 1 comparative example and embodiment obtained device
| Serial number | Thermal coefficient (W/m.K) | Compression strength (MPa) | Center luminous intensity (arbitrary unit) |
| Comparative example 1 | 7.26 | 183.5 | 30.2 |
| Comparative example 2 | 3.12 | 33.2 | 18.5 |
| Embodiment 1 | 7.27 | 184.1 | 30.3 |
It should be noted that above embodiments are only one embodiment of the present invention, the present invention can also make other
Modification and improvement.
Claims (10)
1. a kind of laser lighting component using hollow alumina microballoon, it is characterised in that by hollow alumina microballoon, low melting point
Glass powder, fluorescent powder and volatile organic matter mixing composition, the hollow alumina microballoon is as light scattering medium, the sky
The interior diameter of heart aluminum oxide micro-sphere is 50~500nm, and overall diameter is 400nm~1 μm, the melting range of the glass powder with low melting point
It is 500~650 DEG C.
2. a kind of laser lighting component using hollow alumina microballoon as described in claim 1, it is characterised in that described hollow
Aluminum oxide micro-sphere is warm hollow alumina microballoon.
3. a kind of laser lighting component using hollow alumina microballoon as described in claim 1, it is characterised in that described hollow
Aluminum oxide micro-sphere, glass powder with low melting point, fluorescent powder and volatile organic matter mass ratio be (0.1 ︰, 20 ︰, 80 ︰ 10)~(1 ︰, 8 ︰, 2 ︰
2)。
4. a kind of laser lighting component using hollow alumina microballoon as described in claim 1, it is characterised in that the fluorescence
Powder is Y3Al5O12:Ce。
5. a kind of laser lighting component using hollow alumina microballoon as described in claim 1, it is characterised in that the volatilization
Property organic matter use terpinol.
6. a kind of laser lighting component using hollow alumina microballoon as described in claim 1, it is characterised in that laser lighting
Component is excited using blue laser.
7. a kind of laser lighting component using hollow alumina microballoon as described in claim 1, it is characterised in that blue laser
Wavelength is 420~480nm.
8. the manufacturing method of the laser lighting component using hollow alumina microballoon, it is characterised in that the following steps are included:
1) hollow alumina microballoon, glass powder with low melting point, fluorescent powder and volatile organic matter are uniformly mixed, are configured to slurry；
2) to be cooled by slurry brushing after sapphire surface, high temperature sintering, it removes and sinters from the sapphire surface of carrying
Containing hollow alumina microballoon, fluorescent powder and low-melting glass composition flaky substance to get to using hollow alumina it is micro-
The laser lighting component of ball.
9. as claimed in claim 8 using the manufacturing method of the laser lighting component of hollow alumina microballoon, it is characterised in that
In step 1), the hollow alumina microballoon, glass powder with low melting point, fluorescent powder and volatile organic matter mass ratio be (0.1 ︰
20 ︰, 80 ︰ 10)~(1 ︰, 8 ︰, 2 ︰ 2)；The volatile organic matter uses terpinol.
10. as claimed in claim 8 using the manufacturing method of the laser lighting component of hollow alumina microballoon, it is characterised in that
In step 2), the slurry brushing with a thickness of 50~500 μm；The temperature of the high temperature sintering is 500~650 DEG C.
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| WO2022206571A1 (en) * | 2021-04-02 | 2022-10-06 | 深圳市绎立锐光科技开发有限公司 | Porous multiphase fluorescent ceramic and preparation method therefor |
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Application publication date: 20190531 |