CN109987932A - Complex phase fluorescence ceramics, preparation method and light supply apparatus for white-light illuminating - Google Patents
Complex phase fluorescence ceramics, preparation method and light supply apparatus for white-light illuminating Download PDFInfo
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Abstract
The present invention discloses the complex phase fluorescence ceramics for white-light illuminating.The fluorescence phase and oxide astigmatism that the complex phase fluorescence ceramics have Luetcium aluminum garnet structure are mutually such as Y2O3The astigmatism is mutually evenly distributed and is looped around around the Luetcium aluminum garnet fluorescence phase, and crystallite dimension is nanometer or submicron order, and the fluorescence emitted the blue light exciting light and fluorescence phase that enter in network structure realizes the scattering based on Mie scattering and Releigh scattering.5 μm of the ceramic crystalline grain size < of preparation, can further promote the thermal shock resistance of fluorescence ceramics.The beneficial effects of the present invention are: the white light out for effectively solving fluorescent material in current white light laser lighting is uneven, the weak problem of the thermal shock resistance of fluorescent material.
Description
Technical field
The present invention relates to field of laser illumination, in particular, for the complex phase fluorescence ceramics of white-light illuminating, preparation method and
Light supply apparatus.
Background technique
Laser diode has the characteristics that photoelectric efficiency is high, brightness is high, collimation is high, irradiation distance is remote, size is small.Relatively
It is only applicable to middle low-light level field in LED light product-derived, laser light source then can be adapted for the demand of all brightness, especially in height
The fields such as bright, high photosynthetic efficiency, high directivity have unrivaled advantage.
The blue light optical power density being subjected to when the fluorescent material work of white LED light source is most of in 1W/mm2Hereinafter, most
It is no more than 5W/mm greatly2, and single laser diode (the exposed spot size of such as Nichia-4.5W is about 1.5mm*0.5mm) is flat
Equal optical power density is about 1.5W/mm2, laser lighting light source would generally be converged jointly using more lasers in practical applications
Blue light irradiance power density to fluorescent material surface, i.e. laser lighting receiving required for fluorescent material is White-light LED illumination
Ten times even hundred times or more.This allows for laser lighting and needs to have the excellent irradiation ability of resistance to blue light, excellent with fluorescent material
Different high temperature fluorescent characteristic and superior thermal impact performance.
Since laser itself technology limits, although there are energy densities point for laser high directivity laser beam
The situation of cloth unevenness, therefore laser illumination system structure needs to be equipped with efficient light-uniforming technology.The present inventor proposes, efficiently glimmering
Astigmatism is introduced in light phase mutually to improve even light mixing, to simplify the light path design and ray machine knot of laser lighting light supply apparatus
Structure.
According to the size of scattering center and Fresnel law, can by material to the scattering of light be divided into Reyleigh scattering,
Mie scattering and geometric optics reflected refraction scattering.When the size of scattering center be less than lambda1-wavelength 1/3 when, formed with
Scattering based on Reyleigh, forward and backward scattering is symmetrical；When the size of scattering center is greater than 1/3 incident light
Wavelength or close to light wavelength when, then scattered with Mie based on, forward scattering is more concentrated, and particle is bigger, and forward scattering is got over
By force；When the size of scattering center is greater than the wavelength of light, then based on reflected refraction.
Summary of the invention
1st purpose of the invention is, provides the fluorescence ceramics matrix Luetcium aluminum garnet phase with excellent thermal conductivity
(LuAG), while oxide astigmatism is introduced mutually such as Y2O3.Oxide astigmatism refractive index > 1.8 mutually with higher and crystallite dimension
Less than 1000nm, the transmitting light of the blue light exciting light and fluorescence phase that enter inside fluorescence phase can be caused to scatter with Reyleigh
With the scattering based on Mie scattering.Three-dimensional mutually surround of the compound phase is uniformly distributed, so that the ceramic composite fluorescence is uniform, resistance to
It is hot it is excellent, be suitable for combined with blue light emitting device constitute efficient white light emitting device light convert use component.
2nd purpose of the invention is that the rear-earth-doped ions such as Ce, Mn are introduced in fluorescence ceramics matrix LuAG makes fluorescence
Peak wavelength is adjusted to 530~560nm, so that the light emitting device containing the ceramic composite realizes white light output, that is, ensures ceramics
Turned to be yellow luminous energy is excited directly to be combined into white light with laser residue blue light by blue light.The light emitting device group is properly suitable for composition high
Component is used in the light conversion of the white light emitting device of efficiency.
In order to realize the purpose, technical scheme is as follows: described for the complex phase fluorescence ceramics of white-light illuminating
Complex phase fluorescence ceramics have Luetcium aluminum garnet fluorescence phase and oxide astigmatism phase, the relative volume fraction of the oxide astigmatism phase
Content is 0.001~30%, and the oxide astigmatism is mutually evenly distributed in the network of the Luetcium aluminum garnet fluorescence phase.
As the preferred embodiment of the complex phase fluorescence ceramics for white-light illuminating, the expression formula of the Luetcium aluminum garnet fluorescence phase
For (Lu1-x-yREyCex)3(Al1-zMnz)5O12, wherein it is one or more in RE Tb, Gd, Eu, Sm, Pr, 0.0001≤x≤
0.1, preferred 0.0005≤x≤0.05, preferred 0.001≤x≤0.03；0 y≤0.5 <, preferred 0.001 < y≤
0.05；0 z≤0.1 <, z≤0.03 preferred 0.001 <.
As the preferred embodiment of the complex phase fluorescence ceramics for white-light illuminating, the refractive index of the oxide astigmatism phase is greater than
1.8~2.7, further, astigmatism is mutually selected from Y2O3、La2O3Equal lanthanide rare earth oxides, TeO2、 ZrO2、TiO2、ZnO、
Nb2O5、Ta2O5、HfO2One of or a variety of, crystallite dimension≤1000nm, preferred 50~800nm, adjacent oxide dissipate
The distance between light phase particle is preferably less than 5.0 μm less than 20 μm.
The preparation method of complex phase fluorescence ceramics for white-light illuminating, includes following steps
Step S1, weighs raw material and sintering aid；
Step S2, ball mill mixing；
Step S3, drying and screening；
Step S4, compression molding；
Step S5, sinters ceramic block into；And
Step S6, annealing obtain complex phase transparent fluorescent ceramic.
The preferred embodiment of preparation method as the complex phase fluorescence ceramics for white-light illuminating, in step S1, raw material are
(Lu,RE,Ce)3(Al,Mn)5O12Fluorescent powder or fluorescent powder presoma and oxide astigmatism phase powder, and fluorescent powder or fluorescent powder
The partial size D50 of presoma is 0.1~10 μm, preferred 0.5~3 μm；The primary partial size D50 of oxide astigmatism phase powder is 0.01
~2 μm, preferred 0.05~0.8 μm.
The preferred embodiment of preparation method as the complex phase fluorescence ceramics for white-light illuminating, in step S1, sintering aid
For Li+、Ca2+/Mg2+/Ba2+、La3+/Y3+、TEOS/SiO2, metal ion can be with shapes such as oxide, carbonate, fluorides
The salt of formula；Content is 0.01~5.0wt%, preferably 0.1~2.0wt%.
The preferred embodiment of preparation method as the complex phase fluorescence ceramics for white-light illuminating, in step S5, using atmosphere
Be sintered step sintering: sintered heat insulating temperature is 1650~1800 DEG C, and soaking time is 1~20 hour.The sintered heat insulating temperature
Preferably 1750~1780 DEG C of degree, the sintered heat insulating time is preferably 3~6 hours.
The preferred embodiment of preparation method as the complex phase fluorescence ceramics for white-light illuminating, in step S5, using vacuum
Two-step sintering: in a vacuum furnace, vacuum degree 10-2~10-4Sintering temperature is first risen to 1780~1820 DEG C by Pa, the first step, is burnt
Knot soaking time is 0.5~5h, and sintering temperature is down to 1680~1780 DEG C by second step, and the sintered heat insulating time is 1~30h；Into
One step, the sintered heat insulating of second step is 1700~1730 DEG C, and the sintered heat insulating time is 5~15h.
The preferred embodiment of preparation method as the complex phase fluorescence ceramics for white-light illuminating, in step S5, using vacuum
With hot isostatic pressing two-step sintering: the first step is first sintered in a vacuum furnace, vacuum degree 10-2~10-4Pa, holding temperature 1700
~1800 DEG C, it is preferable that 1700~1750 DEG C, the sintered heat insulating time is 3~6h, and second step puts ceramic block obtained by the first step
Entering and is sintered in hot isostatic pressing furnace, 150~200MPa of pressure, holding temperature is 1600~1700 DEG C, and soaking time is 1~10h, into
One step, 1620~1680 DEG C are sintered, 3~6h of soaking time.
The present invention also provides light supply apparatus, include,
Blue light exciter, wavelength are 380~520nm；And
Foregoing ceramic complex.
Compared with prior art, beneficial effects of the present invention at least that:
1) high refractive index oxide crystallite astigmatism is introduced in garnet fluorescent phase structure mutually such as Y2O3, the oxide astigmatism
Mutually be uniformly distributed and it is three-dimensional surround fluorescence phase, and incident blue light exciting light and ceramics transmitting light are scattered so that the ceramics again
Zoarium outgoing fluorescence is uniform；
2) a kind of Luetcium aluminum garnet fluorescence phase ((Lu, RE, Ce) with excellent thermal conductivity is proposed3(Al,Mn)5O12),
Due to Lu3+Ionic radius ratio Y3+Ionic radius is big, so that LuAG matrix ratio YAG matrix has better thermal shock resistance, together
When mix Mn, RE etc. for LuAG:Ce spectral red shift, may be implemented and blue light ejecting white light；
3) regulated and controled from starting material particle size and sintering method, ceramic crystalline grain size is relatively small, can further promote pottery
Porcelain thermal shock resistance；
4) white light out for efficiently solving fluorescent material in current white light laser lighting is uneven, the heat resistanceheat resistant punching of fluorescent material
Hit the weak problem of performance.
In addition to it is described above present invention solves the technical problem that, constitute technical solution technical characteristic and by these
Except beneficial effect brought by the technical characteristic of technical solution, other technologies problem, technical solution that the present invention can solve
In include other technical characteristics and these technical characteristic bring beneficial effects, will be made in conjunction with attached drawing further details of
Explanation.
Detailed description of the invention
Uniform in light emission system safety testing device schematic diagram shown in FIG. 1.
Fig. 2 is the micro-structure diagram of ceramic composite of the invention.
Fig. 3 is the excitation spectrum of complex phase ceramic of the invention.
Fig. 4 is the emission spectrum of complex phase ceramic of the invention.
Fig. 5 is the light emitting device schematic diagram (transmission-type) containing complex phase ceramic of the invention.
Fig. 6 is the light emitting device schematic diagram (reflective) containing complex phase ceramic of the invention.
Specific embodiment
Below by specific embodiment combination attached drawing, invention is further described in detail.It needs to illustrate herein
It is the explanation of these embodiments to be used to help to understand the present invention, but do not constitute a limitation of the invention.In addition, below
Involved technical characteristic as long as they do not conflict with each other can phase in the described each embodiment of the present invention
Mutually combination.
Comparative example 1
Using high-purity yttrium oxide (Y2O3), aluminium oxide (Al2O3), cerium oxide (CeO2) it is raw material, with magnesia (MgO) and just
Silester (TEOS) is used as sintering aid.Magnesia (MgO) additive amount is mass fraction 0.1%, ethyl orthosilicate (TEOS)
Additive amount is mass fraction 0.6%.Powder material has been configured by the compositing formula, then as ball-milling medium and has been put into using dehydrated alcohol
Alumina balls grinding jar carries out wet ball grinding and prepares ceramic powder, and powder is through drying, sieving, tabletting；It is cold that 200MPa is imposed to it again
Equal static pressure form green body, and ceramic body is put into vacuum sintering furnace after 700 DEG C of heat preservation 4h pre-burnings in 1750 DEG C of vacuum degrees 10- 3It is sintered under the conditions of Pa 8 hours, finally obtains (Y through 1450 DEG C of annealing 20h in Muffle furnace0.99Ce0.01)3Al5O12Fluorescence pottery
Porcelain carries out obtained ceramic material to cut throwing working process, and the white-light illuminating for obtaining 0.3mm thickness is made pottery with complex phase fluorescence
Porcelain.
Embodiment 1
According to (Lu0.96Tb0.03Ce0.01)3(Al0.99Mn0.01)5O12Stoicheiometry weighs high-purity yttrium oxide (Lu2O3), oxidation
Aluminium (Al2O3), cerium oxide (CeO2), terbium oxide (Tb4O7), manganese oxide (MnO2) raw material, choose oxide astigmatism phase Y2O3(D50 is
0.5 μm) volume content be 25%.Using magnesia (MgO) and ethyl orthosilicate (TEOS) as sintering aid, magnesia
(MgO) additive amount is the 0.1% of compound phase gross mass, and ethyl orthosilicate (TEOS) additive amount is the first phase
(Lu0.96Tb0.03Ce0.01)3(Al0.99Mn0.01)5O12The 0.6% of quality.According in comparative example 1 ceramic preparation process flow with
Parameter obtains the white-light illuminating complex phase fluorescence ceramics of 0.3mm thickness.
Embodiment 2
The present embodiment synthesizes fluorescence phase precursor powder (Lu using liquid-phase coprecipitation0.96Tb0.03Ce0.01)3
(Al0.99Mn0.01)5O12, preparation method are as follows: choose the Lu (NO that purity is 99.9% or more3) 3、A1(NO3)3、Ce(NO3)3、
Tb(NO3)3、Mn(NO3)2For raw material, with H2C2O4For precipitating reagent, sediment is obtained to well dispersed, burning after 700 DEG C of calcining 4h
The big nano oxide powder of knot activity；Then the second phase Y that volume fraction is 15% is added in this oxide precursor2O3
Powder (D50 be 0.3 μm), and introduce sintering aid magnesia (MgO) and ethyl orthosilicate (TEOS), wherein magnesia (MgO)
Additive amount is that 0.1% and ethyl orthosilicate (TEOS) additive amount of compound phase gross mass are (Lu0.96Tb0.03Ce0.01)3
(Al0.99Mn0.01)5O12The 0.6% of quality.Configured powder material by the compositing formula, then using dehydrated alcohol as ball-milling medium simultaneously
It is put into alumina balls grinding jar progress wet ball grinding and prepares ceramic powder, powder is through drying, sieving, tabletting；It is imposed again
200MPa isostatic cool pressing forms green body, and ceramic body is put into vacuum sintering furnace after 700 DEG C of heat preservation 4h pre-burnings at 1800 DEG C
Vacuum degree 10-3It is sintered 2 hours under the conditions of Pa, is cooled to 1720 DEG C and keeps the temperature 8 hours, finally anneal in Muffle furnace through 1450 DEG C
20h obtains (Lu0.96Tb0.03Ce0.01)3(Al0.99Mn0.01)5O12With Y2O3Complex phase fluorescence ceramics, by obtained ceramic material
It carries out cutting throwing working process, obtains the white-light illuminating complex phase fluorescence ceramics of 0.3mm thickness.
Embodiment 3
The present embodiment synthesizes fluorescence phase precursor powder (Lu using liquid-phase coprecipitation0.84Tb0.15Ce0.01)3
(Al0.99Mn0.01)5O12, preparation method is the same as embodiment 2；Then it is 5% that volume fraction is added in this oxide precursor
Second phase Y2O3Powder (D50 be 0.1 μm), and introduce sintering aid magnesia (MgO) and ethyl orthosilicate (TEOS), wherein oxygen
Changing 0.1% and ethyl orthosilicate (TEOS) additive amount that magnesium (MgO) additive amount is compound phase gross mass is the first phase
(Lu0.84Tb0.15Ce0.01)3(Al0.99Mn0.01)5O12The 0.4% of quality.Powder material is configured by the compositing formula, then with nothing
Water-ethanol be ball-milling medium and be put into alumina balls grinding jar carry out wet ball grinding prepare ceramic powder, powder is through drying, sieving, pressure
Piece；200MPa isostatic cool pressing is imposed to it again and forms green body, ceramic body is put into vacuum-sintering after 700 DEG C of heat preservation 4h pre-burnings
In 1650 DEG C of vacuum degrees 10 in furnace-3It is sintered 5 hours under the conditions of Pa, is then placed in hot isostatic pressing furnace through 1550 DEG C and 200MPa item
It is sintered under part 5 hours, finally obtains (Lu through 1450 DEG C of annealing 20h in Muffle furnace0.84Tb0.15Ce0.01)3
(Al0.99Mn0.01)5O12With Y2O3Obtained ceramic material is carried out cutting throwing working process, be obtained by complex phase fluorescence ceramics
The white-light illuminating of 0.3mm thickness complex phase fluorescence ceramics.
Embodiment 4
The present embodiment synthesizes fluorescence phase precursor powder (Lu using liquid-phase coprecipitation0.595Tb0.4Ce0.005)3
(Al0.992Mn0.008)5O12, preparation method is with embodiment 2；Then 10% volume fraction is added in this oxide precursor
The second phase Y2O3Powder (D50 is 0.1 μm), and sintering aid magnesia (MgO) and ethyl orthosilicate (TEOS) are introduced, wherein
Magnesia (MgO) additive amount is that 0.08% and ethyl orthosilicate (TEOS) additive amount of compound phase gross mass are the first phase
(Lu0.595Tb0.4Ce0.005)3(Al0.992Mn0.008)5O12The 0.4% of quality.Powder material has been configured by the compositing formula, according to
Complex phase ceramic is made in the identical preparation process of embodiment 3, and obtained ceramic material is carried out to cut throwing working process, is obtained
The white-light illuminating of 0.3mm thickness complex phase fluorescence ceramics.
Embodiment 5
The present embodiment synthesizes fluorescence phase precursor powder (Lu using liquid-phase coprecipitation0.685Tb0.3Ce0.015)3
(Al0.988Mn0.012)5O12, preparation method is with embodiment 2；Then 20% volume fraction is added in this oxide precursor
The second phase Y2O3Powder (D50 is 0.3 μm), and sintering aid magnesia (MgO) and ethyl orthosilicate (TEOS) are introduced, wherein
Magnesia (MgO) additive amount is that 0.12% and ethyl orthosilicate (TEOS) additive amount of compound phase gross mass are the first phase
(Lu0.685Tb0.3Ce0.015)3(Al0.988Mn0.012)5O12The 0.4% of quality.Powder material has been configured by the compositing formula, according to
Complex phase ceramic is made in the identical preparation process of embodiment 3, and obtained ceramic material is carried out to cut throwing working process, is obtained
The white-light illuminating of 0.3mm thickness complex phase fluorescence ceramics.
Table 1 is comparative example and Examples 1 to 5 complex phase ceramic component, preparation technology parameter and its luminous intensity
The main preparation technology parameter and light-emitting uniformity of these embodiment fluorescence ceramics, as shown in table 1.As shown in Fig. 1
Uniform in light emission system safety testing device and method, compared with comparative example, the illumination variance of the different zones of Examples 1 to 5 has bright
Aobvious to improve, embodiment 5, which has, preferably goes out illuminance variance, that is, light-emitting uniformity, and the illumination mean value of embodiment 3 improves 6%.
By Fig. 2 electron scanning electromicroscopic photograph can be seen that fluorescence phase with astigmatism be mutually it is equally distributed, and about 2~3 μm of crystallite dimension；By
Fig. 3 to 4 is it can be seen that a length of 450~465nm of optimum excitation wave of the fluorescence ceramics is presented with the wide emission peak in 568nm
For yellow orange color emissions.Light supply apparatus schematic diagram containing the ceramic composite refers to Fig. 5 to 6, by above-mentioned ceramic composite
Bottom surface it is silver-plated and be welded in copper cooling base 5, transmission-type can be passed through or reflection type optical path realizes white-light illuminating.Benefit
It uses single or more lasers 1 as excitation light source, exposes to the pottery after the collimation of lens 2, pack and the even light of dodging device 3
Excitation light source wavelength 6 is converted to orange light by 4 surface of porcelain complex, the ceramic composite, and remaining blue light and potsherd transmitting light are mixed
Close the equal white light 7 for obtaining brightness height and colour rendering index Ra > 85.
Embodiments of the present invention are only expressed above, and the description thereof is more specific and detailed, but and cannot therefore understand
For the limitation to patent of invention range.It should be pointed out that for those of ordinary skill in the art, not departing from this hair
Under the premise of bright design, various modifications and improvements can be made, and these are all within the scope of protection of the present invention.Therefore, this hair
The scope of protection shall be subject to the appended claims for bright patent.
Claims (10)
1. being used for the complex phase fluorescence ceramics of white-light illuminating, which is characterized in that the complex phase fluorescence ceramics have Luetcium aluminum garnet glimmering
Light phase and oxide astigmatism phase, the relative volume fraction content of the oxide astigmatism phase are 0.001~30%, the oxide
Astigmatism is mutually evenly distributed in the network of the Luetcium aluminum garnet fluorescence phase.
2. the complex phase fluorescence ceramics according to claim 1 for white-light illuminating, which is characterized in that the Luetcium aluminum garnet
The expression formula of fluorescence phase is (Lu1-x-yREyCex)3(Al1-zMnz)5O12, wherein it is a kind of or more in RE Tb, Gd, Eu, Sm, Pr
Kind；0.0001≤x≤0.1, preferred 0.0005≤x≤0.05, preferred 0.001≤x≤0.03；0 y≤0.5 <, preferably
0.001 y≤0.05 <；0 z≤0.1 <, z≤0.03 preferred 0.001 <.
3. the complex phase fluorescence ceramics according to claim 1 for white-light illuminating, which is characterized in that the oxide astigmatism
The refractive index of phase is 1.8~2.7, and further, astigmatism is mutually selected from Y2O3、La2O3Equal lanthanide rare earth oxides, TeO2、ZrO2、
TiO2、ZnO、Nb2O5、Ta2O5、HfO2One of or a variety of, crystallite dimension≤1000nm, preferred 50~800nm it is adjacent
The distance between oxide astigmatism phase particle is preferably less than 5.0 μm less than 20 μm.
4. the preparation method of the complex phase fluorescence ceramics for white-light illuminating, which is characterized in that it include following steps, step S1,
Weigh raw material and sintering aid；
Step S2, ball mill mixing；
Step S3, drying and screening；
Step S4, compression molding；
Step S5, sinters ceramic block into；
Step S6, annealing obtain complex phase fluorescence ceramics.
5. the preparation method of the complex phase fluorescence ceramics according to claim 4 for white-light illuminating, which is characterized in that step
In S1, raw material are (Lu, RE, Ce)3(Al,Mn)5O12Fluorescent powder or fluorescent powder presoma and oxide astigmatism phase powder, and it is glimmering
The partial size D50 of light powder or fluorescent powder presoma is 0.1~10 μm, preferred 0.5~3 μm；Oxide astigmatism phase powder it is primary
Partial size D50 is 0.01~2 μm, preferred 0.05~0.8 μm.
6. the preparation method of the complex phase fluorescence ceramics according to claim 4 for white-light illuminating, which is characterized in that step
In S1, sintering aid Li+, Ca2+/Mg2+/Ba2+, La3+/Y3+, TEOS/SiO2, metal ion can be with oxide, carbonic acid
The salt of the forms such as salt, fluoride；The additive amount of sintering aid is 0.01~5.0wt%, preferably 0.1~2.0wt%.
7. the preparation method of the complex phase fluorescence ceramics according to claim 4 for white-light illuminating, which is characterized in that step
In S5, one step of atmosphere sintering is used to be sintered: for sintered heat insulating temperature for 1650~1800 DEG C, soaking time is 1~20 hour；
The sintered heat insulating temperature is preferably 1750~1780 DEG C, and the sintered heat insulating time is preferably 3~6 hours.
8. the preparation method of the complex phase fluorescence ceramics according to claim 4 for white-light illuminating, which is characterized in that step
In S5, using vacuum two-step sintering: in a vacuum furnace, vacuum degree 10-2~10-4Pa, the first step first rise to sintering temperature
1780~1820 DEG C, the sintered heat insulating time is 0.5~5h, and sintering temperature is down to 1680~1780 DEG C by second step, sintered heat insulating
Time is 1~30h；Further, the sintered heat insulating of second step is 1700~1730 DEG C, and the sintered heat insulating time is 5~15h.
9. the preparation method of the complex phase fluorescence ceramics according to claim 4 for white-light illuminating, which is characterized in that step
In S5, using vacuum and hot isostatic pressing two-step sintering: the first step is first sintered in a vacuum furnace, vacuum degree 10-2~10-4Pa is protected
Temperature is 1700~1800 DEG C, it is preferable that 1700~1750 DEG C, the sintered heat insulating time is 3~6h, and second step is by first step institute
Ceramic block is put into hot isostatic pressing furnace and is sintered, pressure is 150~200MPa, and holding temperature is 1600~1700 DEG C, heat preservation
Time is 1~10h, further, is sintered 1620~1680 DEG C, 3~6h of soaking time.
10. light supply apparatus, which is characterized in that include,
Blue light exciter；And
Ceramic composite described in any one of claim 1 to 9.
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