CN111039660A - Fluorescent ceramic, preparation method thereof, light source device and projection device - Google Patents
Fluorescent ceramic, preparation method thereof, light source device and projection device Download PDFInfo
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Abstract
The invention provides a fluorescent ceramic, a preparation method thereof, a light-emitting device and a projection device, wherein the fluorescent ceramic comprises an alumina matrix phase and a light-emitting center uniformly dispersed in the alumina matrix phase, and is characterized in that the light-emitting center is spherical fluorescent single crystal particles which have smooth spherical outer surfaces. The spherical fluorescent single crystal particles have regular spherical shapes and smooth outer surfaces, so that the original appearance can be kept after sintering, the structural strength of the sintered fluorescent ceramic is improved, and in addition, the luminous efficiency of the fluorescent ceramic can be further improved by the spherical fluorescent single crystal particles with larger particle size range.
Description
Technical Field
The invention relates to a fluorescent ceramic, in particular to a fluorescent ceramic containing spherical fluorescent single crystal particles, a preparation method thereof, a light-emitting device and a projection device.
Background
The technology of obtaining visible light by exciting a fluorescent material with blue laser is continuously paid attention to along with the development of laser display technology, and the current research trend is mainly to develop a novel fluorescent material (wavelength conversion material) aiming at the characteristics of laser excited fluorescent powder, and the main requirements are that the luminous brightness is high, the fluorescent material can bear high-power laser irradiation, the optical conversion efficiency is high, the heat conduction performance is high, and the like.
The fluorescent ceramic is an ideal choice for the current high-power light source due to the properties of heat resistance, high heat conductivity and the like. The traditional YAG and Ce pure-phase fluorescent ceramic is weaker than a silica gel and glass packaged wavelength conversion device in light emitting performance, and particularly, when the fluorescent ceramic is packaged in an ultrathin mode, light efficiency loss caused by low blue light absorption rate, interface total reflection and the like is large. At present, in order to improve the luminescent performance of the fluorescent ceramic, the fluorescent powder particles with larger size are preferably selected, because most of the existing fluorescent powder particles are irregular in shape, as shown in fig. 1, more raised sharp corners (as shown in the part encircled by the circle in fig. 1) exist on the surface, and the irregular surface can easily enter a liquid phase and generate substance migration (as shown in the part encircled by the circle in fig. 2) in the sintering process for preparing the fluorescent ceramic, so that the surface integrity of the fluorescent powder particles is damaged, and the luminescent performance of the fluorescent powder particles is further influenced; in addition, the phosphor particles that produce liquid phase and material migration also affect nearby Al2O3The growth of crystal grains results in insufficient bonding strength, and the reliability of the fluorescent ceramic is seriously influenced.
Therefore, a new fluorescent ceramic is needed to overcome the defect of low luminous efficiency of the current fluorescent ceramic.
Disclosure of Invention
In view of the above, the present invention aims to provide a high-performance fluorescent ceramic comprising spherical fluorescent single-crystal particles as a light-emitting phase, wherein the spherical fluorescent single-crystal particles have a regular shape and a smooth outer surface and are capable of being excited by excitation light to emit visible light.
According to the invention, a fluorescent ceramic is provided, which comprises an alumina matrix phase and a luminous center uniformly dispersed in the alumina matrix phase, and is characterized in that the luminous center is spherical fluorescent single crystal particles, and the spherical fluorescent single crystal particles have smooth spherical outer surfaces.
Further, the particle size of the spherical fluorescent single crystal particles is the same, and the particle size of the spherical fluorescent single crystal particles is 30-50 um.
Further, the spherical fluorescent single crystal particles contain fluorescent powder with different particle sizes, and the particle size of the spherical fluorescent single crystal particles is 20-80 um.
Further, the spherical fluorescent single crystal particles are YAG: Ce crystal grains.
Further, the mass of the spherical fluorescent single crystal particles is 15 to 90 wt%, preferably 40 to 60 wt% of the total mass of the fluorescent ceramic.
The invention also provides a light source device, which comprises an excitation light source and the fluorescent ceramic, wherein the excitation light source can emit excitation light for exciting the fluorescent ceramic to emit stimulated light.
The invention also provides a projection device for projection imaging, which comprises the light source device.
The invention also provides a preparation method of the fluorescent ceramic, which comprises the following steps:
s1: preparing spherical fluorescent single crystal particles;
s2: the raw materials are mixed, and then the mixture is stirred,
weighing oxide raw material powder according to the stoichiometric amount of the fluorescent ceramic, putting the oxide raw material powder into a polytetrafluoroethylene ball milling tank, adding a proper amount of ethanol as a grinding solvent, adding a proper amount of ceramic dispersant as a dispersant, carrying out ball milling by using zirconia balls with ultralow attrition rate for 1-72 hours, preferably 24-36 hours, and drying to obtain the raw material powder;
s3: the mixture is pressed into tablets for molding,
putting a proper amount of the raw material powder prepared in the step S2 into a graphite die, and pre-pressing under the pressure of 5-15MPa to obtain a ceramic green body;
s4: the ceramic is sintered, and the sintered ceramic,
and (3) placing the ceramic green body obtained in the step (S3) into a hot-pressing sintering furnace, sintering in an argon atmosphere at the sintering temperature of 1250-1650 ℃, keeping the temperature for 30min-6h, wherein the sintering pressure is 30-200MPa, preferably 40-60MPa, and after sintering, removing the pressure and cooling along with the furnace to obtain the fluorescent ceramic.
Further, the oxide raw material powder includes yttrium oxide and magnesium oxide, wherein the content of yttrium oxide is 0.05-1 wt% of aluminum oxide, and the content of magnesium oxide is 0.05-1 wt% of aluminum oxide.
Further, the oxide raw material powder includes yttrium oxide and magnesium oxide, wherein the particle size of the yttrium oxide and the magnesium oxide is 0.05 to 0.1 um.
Advantageous effects
According to the present invention, there is provided a fluorescent ceramic comprising spherical fluorescent single crystal particles having a regular shape and a smooth outer surface. Because the spherical fluorescent single crystal particles have smooth outer surfaces, the edges are not easy to enter liquid phase sintering in the sintering process, so that the luminescent property of the spherical fluorescent single crystal particles can be maintained, and the structural strength of the sintered fluorescent ceramic can be improved. In addition, the coverage range of the particle size of the spherical fluorescent single crystal particles can be larger than that of fluorescent powder, the size of the fluorescent powder particles is usually not more than 25-30um, the spherical fluorescent single crystal particles can reach 50-80um, and the luminous intensity of large particles is higher.
Drawings
The drawings represent non-limiting exemplary embodiments described herein. It will be appreciated by those skilled in the art that the drawings are not necessarily to scale, emphasis instead being placed upon illustrating the principles of the invention. In the drawings:
FIG. 1 is a schematic diagram showing the micro-morphology of a conventional phosphor with a better sphericity.
FIG. 2 is a schematic diagram showing the fusion phenomenon at irregular edges of YAG phosphor particles after firing of fluorescent optical ceramic in the prior art.
Fig. 3 is a schematic view of spherical fluorescent single crystal particles produced using a hydrogen flame single crystal sphere producing apparatus according to the present invention.
FIG. 4 is YAG-Al according to examples 1 and 2 of the present invention2O3Distribution diagram of spherical YAG to Ce fluorescent single crystal particles in the fluorescent ceramic composite material.
FIG. 5 is YAG-Al according to example 3 of the present invention2O3Distribution diagram of spherical YAG to Ce fluorescent single crystal particles in the fluorescent ceramic composite material.
Fig. 6 is a graph showing a comparison of the performance of different ceramic samples.
Fig. 7 is a graph showing a comparison of the performance of different ceramic samples.
Fig. 8 is a graph showing a comparison of the performance of different ceramic samples.
FIG. 9 is a schematic diagram of a hydrogen flame single crystal ball apparatus for producing spherical fluorescent single crystal particles according to the present invention.
Detailed Description
One or more exemplary embodiments of the present invention are described more fully hereinafter with reference to the accompanying drawings, in which one or more exemplary embodiments of the invention can be readily ascertained by one skilled in the art. As those skilled in the art will recognize, the exemplary embodiments may be modified in various different ways without departing from the spirit or scope of the present invention, which is not limited to the exemplary embodiments described herein.
The invention provides a fluorescent ceramic which is a high-performance photoluminescent ceramic composite material and is a fluorescent ceramic which takes an alumina phase with fine grains as a substrate, wherein the substrate wraps spherical fluorescent single crystal particles, the spherical fluorescent single crystal particles in the ceramic can be excited by excitation light to emit visible light, the compact alumina substrate with fine grains has good light transmittance, and the excited visible light can penetrate through the alumina substrate and then is emitted out of the ceramic.
Hair brushThe bright spherical fluorescent single crystal particles are regular spheres and have smooth outer surfaces, so that the edges of the bright spherical fluorescent single crystal particles do not easily enter liquid phase sintering in the sintering process like irregularly-shaped fluorescent particles in the prior art (as shown in figures 1 and 2), but the edges of the bright spherical fluorescent single crystal particles keep the original appearance after sintering, the surface integrity of the fluorescent particles is maintained, the adverse effect on the luminescence performance is avoided, and Al has the advantages of no adverse effect on the luminescence performance2O3The crystal grains can be uniformly developed on the surface of the spherical fluorescent single crystal particles, thereby ensuring Al2O3And the phase and the spherical fluorescent single crystal particle phase. For example, the spherical fluorescent single crystal grains may be YAG: Ce spherical fluorescent single crystal grains. According to the present invention, the mean particle diameter of the spherical fluorescent single crystal particle may be 20 to 80um, preferably 30 to 50 um.
As described above, the fluorescent ceramic comprises the above spherical fluorescent single crystal particles as a luminescent phase and Al as a matrix phase2O3. Because the spherical fluorescent single crystal particles in the fluorescent ceramic are regular spheres and have smooth outer surfaces, the luminescent performance and the structural strength of the ceramic are not adversely affected compared with the prior art. The particle size of the spherical fluorescent single crystal particles contained in the fluorescent ceramic can be the same, for example, 30-50um, and the luminous intensity of the fluorescent ceramic is higher than that of the fluorescent ceramic using the common fluorescent powder particles in the prior art because the particle size of the spherical fluorescent single crystal particles contained in the fluorescent ceramic is larger than that of the common fluorescent powder particles. On the other hand, the particle size of the spherical fluorescent single crystal particles contained in the fluorescent ceramic may also be different, for example, the distribution range of the particle size may be between 20-80 um. When the spherical fluorescent single crystal particles with different particle sizes are mixed and matched, higher fluorescent particle filling rate can be obtained in the fluorescent ceramic compared with the spherical fluorescent single crystal particles with single particle size, and therefore higher luminous efficiency can be achieved. Because the luminous surface of the spherical fluorescent single crystal particles is more uniform and the stacking performance is better, the spherical single crystal particles with various sizes occupy less volume than the fluorescent powder particles with irregular shapes, namely, more luminous centers contained in the composite fluorescent ceramic can be ensured, and the luminous performance of the fluorescent ceramic is higherGood results are obtained.
Optionally, Y may be further included in the fluorescent ceramic2O3In an amount of Al2O30.05 to 1 wt%; MgO with Al content2O30.05 to 1 wt%; and a proper amount of ceramic dispersant, wherein the mass of the spherical fluorescent single crystal particles can be 15-90 wt%, preferably 40-60 wt% of the total mass of the fluorescent ceramic, so as to achieve a good luminous effect.
The following describes a method and an apparatus for preparing spherical fluorescent single crystal particles according to the present invention, and specifically, as shown in fig. 9, the method and the apparatus for preparing spherical fluorescent single crystal particles according to the present invention adopt a hydrogen flame fusion method, the apparatus adopted in the present invention includes a charging barrel and a reaction barrel, the charging barrel is mainly used for accommodating raw material powder for fluorescent powder, the charging barrel includes a powder discharge port, and specifically, the particle size range of the raw material powder for fluorescent powder is 2-20 um. The reaction cylinder comprises a powder feeding hole butted with the powder discharging hole of the charging cylinder, so that the fluorescent powder raw material powder in the charging cylinder enters through the powder feeding hole of the reaction cylinder; the reaction cylinder also comprises an oxygen inlet and a hydrogen inlet, the oxygen and the hydrogen entering the reaction cylinder react in the combustion zone to provide temperature conditions for liquefying the fluorescent powder raw material powder, so that the fluorescent powder raw material powder entering the reaction cylinder is instantly liquefied in the combustion zone; the reaction cylinder also comprises a powder collecting area which is mainly used for collecting the fluorescent powder falling in a free-falling mode after being liquefied in the combustion area. Further, the phosphor raw material powder is commercially available raw material powder of YAG Ce, alumina, yttria, ceria, etc. The preparation method comprises the following steps of firstly introducing reaction gas into a reaction cylinder through an oxygen inlet and a hydrogen inlet, mixing the introduced oxygen and hydrogen in a combustion zone and igniting, when the temperature of the combustion zone reaches 3000 ℃ plus 2000 ℃, blowing fluorescent powder raw material powder into the reaction cylinder through a powder outlet of a charging cylinder, wherein the amount of the blown fluorescent powder raw material powder is 3g every time, the blowing is carried out for 1 time every three minutes, the blowing amount and the interval time of the fluorescent powder raw material powder are mainly related to the reaction process of the fluorescent powder raw material powder in the reaction cylinder, and the purpose is to blow the fluorescent powder into the reaction cylinder for the next time after the last blown raw material powder is combusted, liquefied and solidified; the blown-in fluorescent powder raw material powder is liquefied in a combustion area for a short time to form liquid drops, and the liquid drops fall into a powder collecting area in a free falling mode, wherein the falling height range is 30cm-80cm, the falling height can be adjusted by adopting a lifting type powder collecting area, and the liquefied fluorescent powder raw material powder liquid drops are solidified into spherical fluorescent single crystal particles in the falling process; specifically, the temperature of the combustion zone is controlled by the amount of hydrogen gas introduced, and the spherical fluorescent single crystal particles having a continuously varying particle diameter and a particle diameter distribution ranging from 20 to 80um can be prepared by controlling the rate of addition of the fluorescent powder as the raw material powder and by controlling the temperature of the combustion zone of the hydrogen-flame single crystal ball manufacturing apparatus. It should be noted that the raw material powder introduced into the combustion zone is not completely liquefied, and part of the un-liquefied raw material powder of the phosphor powder directly falls into the powder collection zone, and the spherical phosphor single crystal particles can be separated by sieving to obtain phosphor particles with higher purity and regular shape.
Further, the fluorescent ceramic of the present invention can be prepared by a method comprising the steps of:
s1: the spherical fluorescent single crystal particles are prepared.
S2: mixing raw materials:
weighing oxide raw material powder according to the chemical weight of the fluorescent ceramic, putting the oxide raw material powder into a polytetrafluoroethylene ball milling tank, adding a proper amount of ethanol as a grinding solvent, adding a proper amount of ceramic dispersant as a dispersant, carrying out ball milling by using zirconia balls with ultra-low attrition rate for 1-72h, preferably 24-36h, and drying to obtain raw material powder;
s3: tabletting and forming:
and (4) filling a proper amount of the raw material powder prepared in the step (S2) into a graphite mold, and performing pre-pressing under the pressure of 5-15MPa to obtain a ceramic green body.
S4: and (3) sintering of ceramics: and (4) placing the ceramic green body prepared in the step S3 into a hot-pressing sintering furnace, sintering in an argon atmosphere at the sintering temperature of 1250-1650 ℃, preserving the heat for 30min-6h, wherein the sintering pressure is 30-200MPa, preferably 40-60MPa, and after sintering, removing the pressure and cooling along with the furnace to obtain the fluorescent ceramic.
Optionally, inIn step S2: it is also possible to first introduce Al having a particle size of 0.05 to 1um, preferably 0.08 to 0.2um2O3Powder, Y with particle size of 0.05-0.1um2O3Placing the powder and MgO powder with particle diameter of 0.05-0.1um into a polytetrafluoroethylene ball mill pot, wherein Y is2O3The content of the powder is Al2O30.05-1 wt% of the powder, and MgO powder in Al content2O30.05-1 wt% of powder, ethanol as a grinding solvent, and a ceramic dispersant as a dispersant, performing first ball milling for 1-72h, preferably 24-36h, after the first ball milling is finished, adding the spherical fluorescent single crystal particles prepared in the step S1 into a ball milling tank according to a certain proportion to perform second ball milling, wherein the adding amount of the spherical fluorescent single crystal particles is 15-90 wt%, preferably 40-60 wt%, of the total powder mass, the time of the second ball milling is 10-120min, preferably 40min, drying and crushing the slurry after the two ball milling is finished, and sieving to obtain the raw material powder of the fluorescent ceramic.
According to the preparation method of the fluorescent ceramic, the fluorescent ceramic with high luminous performance can be prepared. The ceramic contains spherical fluorescent single crystal particles with regular shapes and smooth outer surfaces, and can exert good luminescence performance.
The present invention will be described in detail below with reference to specific examples.
Example 1
The YAG-Al of this example was prepared as follows2O3A fluorescent ceramic.
S1: preparation of spherical fluorescent Single Crystal particles
It should be noted that the size of the spherical fluorescent single crystal particles can be controlled by controlling the temperature of the combustion zone and controlling the degree of liquefaction of the powder and the size of the liquid droplets by controlling the injection amount and the injection speed of the raw material powder into the combustion zone.
S2: raw material powder for preparing fluorescent ceramic
Raw materials: selecting high-purity superfine Al2O3Nanopowders, powdersThe particle size of the powder is 0.05-1um, preferably 0.08-0.2 um; selecting high-purity superfine Y2O3Nano powder with the grain diameter of 0.05-0.1 um; selecting high-purity superfine MgO nano powder with the particle size of 0.05-0.1 um; the YAG/Ce spherical fluorescent single crystal particles prepared in the step S1 are selected, and the average particle size is 20-80um, preferably 30-50 um.
Weighing a certain amount of Al2O3Powder, Y2O3Powder and MgO powder, wherein Y2O3The content of the powder is Al2O30.05-1 wt% of the powder, and MgO powder containing Al2O30.05-1 wt% of the powder. And (2) putting the three kinds of powder into a polytetrafluoroethylene ball milling tank, adding a proper amount of ethanol as a grinding solvent, adding a proper amount of ceramic dispersant as a dispersant, and carrying out primary ball milling by using zirconia balls with ultralow attrition loss rate for 1-72h, preferably 24-36 h.
After the first ball milling is finished, adding YAG and Ce spherical fluorescent single crystal particles into a ball milling tank, wherein the mass percent of the YAG and Ce spherical fluorescent single crystal particles is 15-90 wt% of the total powder, preferably 40-60 wt%, and then carrying out second ball milling at low speed for 10-120min, preferably 40 min.
The first ball milling time is longer so as to fully mix Al2O3Powder, Y2O3Ultrafine powders such as powder and MgO powder, Y2O3Powder and MgO powder as sintering aid, essentially Al2O3The powders are fully mixed to ensure even diffusion. The secondary ball milling time is shorter because the YAG: Ce spherical fluorescent single crystal particles are larger and are easier to disperse, and if the ball milling time is too long, the surface morphology of the crystal grains of the YAG: Ce single crystal spheres is easy to damage by the grinding balls, thus the luminescence performance is influenced.
And after the ball milling is finished for two times, drying at constant temperature in vacuum to obtain dry powder. The dry powder is calcined in a muffle furnace at 500-650 ℃ to remove the organic components in the powder for 1-10 hours. And sieving the calcined powder with 80-mesh, 150-mesh and 200-mesh sieves for granulation to obtain high-fluidity raw material powder, namely the raw material powder of the fluorescent ceramic.
S3: performing hot-pressing sintering
Weighing a proper amount of raw material powder prepared in the step S2, putting the raw material powder into a graphite mold, pre-pressing under the pressure of 5-15MPa, then putting the graphite mold into a hot-pressing sintering furnace, sintering under the argon atmosphere at the sintering temperature of 1250-1650 ℃, and preserving heat for 30min-6h, wherein the sintering pressure is 30-200MPa, and preferably 40-60 MPa. After sintering, the pressure is removed and the mixture is cooled along with the furnace to obtain YAG-Al2O3Fluorescent ceramic composite material of Al2O3The phase is a continuous matrix phase in which spherical YAG: Ce fluorescent single crystal particles are dispersed, as schematically shown in fig. 4.
Example 2:
the YAG-Al of this example was prepared as follows2O3A fluorescent ceramic.
S1: the YAG-Ce spherical fluorescent single crystal grains, preferably 30-50um in diameter, were prepared according to the method for preparing spherical fluorescent single crystal grains in step S1 of example 1.
S2: raw material powder for preparing fluorescent ceramic
Weighing Al2O3Powder, preferably high purity Al having a particle size of 0.05-1um2O3The powder, in this embodiment, is selected from commercial Al with a particle size of 0.1-0.2um and TM-DAR2O3Powder of YAG-Ce spherical fluorescent single crystal particles prepared in step S1, wherein Al2O3The volume ratio of the powder to the YAG to Ce spherical fluorescent single crystal particles is Al2O3YAG 6: 4. Mixing Al2O3Putting the powder and YAG: Ce spherical fluorescent single crystal particle powder into a polytetrafluoroethylene ball mill tank in proportion, adding high-purity alumina sand balls with the particle size of 0.5um for ball milling, wherein the medium is alcohol, the ball milling time is 30min-2h, preferably 1h, drying the slurry after ball milling, crushing, and sieving to obtain the raw material powder of the fluorescent ceramic.
S3: performing hot-pressing sintering
Putting a proper amount of the raw material powder prepared in the step S2 into a graphite die, pre-pressing under the pressure of 5-15MPa, and then putting the graphite die into a hot-pressing sintering furnaceSintering in argon atmosphere at 1250-1650 deg.C for 30min-6h and sintering pressure of 30-200MPa, preferably 40-60 MPa. After sintering, the pressure is relieved and furnace cooling is carried out, thus obtaining YAG-Al2O3Fluorescent ceramic composite material of Al2O3The phase is a continuous matrix phase in which spherical YAG: Ce fluorescent single crystal grains are dispersed, as also schematically shown in fig. 4.
Example 3:
the YAG-Al of this example was prepared as follows2O3A fluorescent ceramic.
S1: preparation of spherical fluorescent Single Crystal particles
The YAG: Ce spherical fluorescent single crystal grains were produced similarly to the method for producing spherical fluorescent single crystal grains in step S1 in example 1, except that YAG: Ce fluorescent single crystal grains having a grain size continuously varying in the range of 20 to 80um, that is, grains having a gradient change in grain size were produced by continuously changing the rate of addition of the raw material phosphor powder and by controlling the temperature in the combustion zone.
S2: raw material powder for preparing fluorescent ceramic
Weighing Al2O3Powder, preferably high purity Al having a particle size of 0.05-1um2O3The powder, in this embodiment, may be selected from commercial Al having a particle size of 0.1-0.2um and a TM-DAR designation2O3Powder of YAG-Ce spherical fluorescent single crystal particles prepared in step S1, wherein Al2O3The volume ratio of the powder to the YAG to Ce spherical fluorescent single crystal particles is Al2O3YAG 6: 4. Mixing Al2O3Putting the powder and YAG: Ce spherical fluorescent single crystal particle powder into a polytetrafluoroethylene ball mill tank in proportion, adding high-purity alumina sand balls with the particle size of 0.5um for ball milling, wherein the medium is alcohol, the ball milling time is 30min-2h, preferably 1h, drying the slurry after ball milling, crushing and sieving to obtain the raw material powder of the fluorescent ceramic.
S3: performing hot-pressing sintering
Prepared in step S2The proper amount of raw material powder is put into a graphite die, the proper amount of raw material powder is weighed and put into the graphite die, pre-pressing is carried out under the pressure of 5-15MPa, then the graphite die is put into a hot-pressing sintering furnace, sintering is carried out under the argon atmosphere, the sintering temperature is 1250-. After sintering, the pressure is relieved and furnace cooling is carried out, thus obtaining YAG-Al2O3Fluorescent ceramic composite material of Al2O3The phase is a continuous matrix phase in which spherical YAG: Ce fluorescent single crystal grains having different grain sizes are dispersed, as schematically shown in fig. 5. The embodiment has the advantages that the spherical single crystal particles with different particle size ranges have higher fluorescent particle filling rate, so that more luminescent centers are contained in the fluorescent ceramic, and the luminous efficiency is higher.
The effects of the present invention will be described below with reference to table 1 and fig. 6 to 8.
In order to verify the luminescence property of the fluorescent ceramic of the present invention, the inventors of the present invention used sample a, sample B and sample C as test samples of the luminous flux (lm) value, and tested the luminous flux (lm) values of sample a, sample B and sample C at different laser currents, and obtained three different sets of luminous flux (lm) values, wherein sample a is a common fluorescent ceramic of the prior art, sample B is a fluorescent ceramic of the present invention comprising spherical fluorescent single crystal particles having a single particle size, and sample C is a fluorescent ceramic of the present invention comprising spherical fluorescent single crystal particles having a plurality of particle sizes, and the test results of the luminous flux (lm) values of the three different samples are shown in table 1 below.
TABLE 1 test luminous flux (lm) values for different ceramic samples at different laser currents
As can be seen from the above table, the fluorescent ceramics prepared from the phosphor particles with different morphologies have different values of luminous flux (lm) at the same laser current, and under the same laser current, the value of luminous flux (lm) of sample a is the smallest, the value of luminous flux (lm) of sample B is the medium, and the value of luminous flux (lm) of sample C is the largest, that is, the luminous performance of sample a is the worst, the luminous performance of sample B is the medium, and the luminous performance of sample C is the best.
Meanwhile, comparison graphs of the luminescence properties of the fluorescent ceramics prepared by the phosphor particles with different morphologies are shown in a visual manner in fig. 6 to 8 of the present application, wherein fig. 6 shows comparison graphs of the luminescence properties of sample a, sample B and sample C; FIG. 7 shows a graph comparing the luminescence properties of sample A and sample B; fig. 8 shows a graph comparing the luminescence properties of sample a and sample C. Sample A is a fluorescent ceramic sample prepared from common irregular-shaped YAG-Ce particles, sample B is a fluorescent ceramic sample prepared from single-particle spherical YAG-Ce single-crystal particles, and sample C is a fluorescent ceramic sample prepared from different-particle-size-ratio spherical YAG-Ce single-crystal particles. The ordinate in fig. 6-8 is the luminous flux (lm) value, the abscissa is the laser current, which indicates that the luminous flux (lm) value of the light emitted by the ceramic under the irradiation of the laser changes with increasing current/power, and the transition at 1.8A indicates that thermal quenching occurs at this time, and that a sudden drop in luminous efficiency occurs, which is also the stopping point of the test.
As can be seen from the data in the table 1 and the luminescence property curves in the attached figures 6 to 8, the luminescence properties of the fluorescent ceramic samples prepared from the spherical YAG: Ce single crystal particles with a single particle size and the fluorescent ceramic samples prepared from the spherical YAG: Ce single crystal particles with different particle size ratios are better than those of the fluorescent ceramic samples prepared from the common irregular-shaped YAG: Ce particles, and the luminescence properties of the fluorescent ceramic samples prepared from the spherical YAG: Ce particles with different particle size ratios are better than those of the fluorescent ceramic samples prepared from the spherical YAG: Ce single particle size.
It can be seen that the spherical fluorescent single crystal particles of the present invention have advantageous effects over the irregular fluorescent particles of the prior art.
The raw materials listed in the invention, the upper and lower limits of the raw materials, the upper and lower limits of the process parameters and the values of the intervals can all realize the invention, and the examples are not listed; any simple modifications or equivalent changes made to the above embodiments according to the technical spirit of the present invention still fall within the scope of the technical solution of the present invention.
Claims (10)
1. A fluorescent ceramic comprising an alumina matrix phase and luminescent centers uniformly dispersed in the alumina matrix phase, wherein the luminescent centers are spherical fluorescent single crystal particles having a smooth spherical outer surface.
2. The fluorescent ceramic of claim 1, wherein the spherical fluorescent single crystal particles are the same size, and the spherical fluorescent single crystal particles are 30-50um in size.
3. The fluorescent ceramic of claim 1, wherein the spherical fluorescent single crystal particles have different particle sizes, and the size of the spherical fluorescent single crystal particles is 20-80 um.
4. The fluorescent ceramic of any one of claims 1-3, wherein the spherical fluorescent single crystal grains are YAG: Ce grains.
5. The fluorescent ceramic of claim 1, wherein the mass of the spherical fluorescent single-crystal particles is 15-90 wt%, preferably 40-60 wt%, of the total mass of the fluorescent ceramic.
6. A light source device, comprising an excitation light source and the fluorescent ceramic according to any one of claims 1 to 6, wherein the excitation light source is capable of emitting excitation light for exciting the fluorescent ceramic to emit stimulated light.
7. A projection apparatus for projection imaging, comprising the light source apparatus of claim 6.
8. The preparation method of the fluorescent ceramic is characterized by comprising the following steps of:
s1: preparing spherical fluorescent single crystal particles;
s2: the raw materials are mixed, and then the mixture is stirred,
weighing oxide raw material powder according to the stoichiometric amount of the fluorescent ceramic, putting the oxide raw material powder into a polytetrafluoroethylene ball milling tank, adding a proper amount of ethanol as a grinding solvent, adding a proper amount of ceramic dispersant as a dispersant, carrying out ball milling by using zirconia balls with ultralow attrition rate for 1-72 hours, preferably 24-36 hours, and drying to obtain the raw material powder;
s3: the mixture is pressed into tablets for molding,
putting a proper amount of the raw material powder prepared in the step S2 into a graphite die, and pre-pressing under the pressure of 5-15MPa to obtain a ceramic green body;
s4: the ceramic is sintered, and the sintered ceramic,
and (3) placing the ceramic green body obtained in the step (S3) into a hot-pressing sintering furnace, sintering in an argon atmosphere at the sintering temperature of 1250-1650 ℃, keeping the temperature for 30min-6h, wherein the sintering pressure is 30-200MPa, preferably 40-60MPa, and after sintering, removing the pressure and cooling along with the furnace to obtain the fluorescent ceramic.
9. The production method according to claim 8, wherein the oxide raw material powder comprises yttrium oxide and magnesium oxide, wherein the yttrium oxide content is 0.05 to 1 wt% of the aluminum oxide, and the magnesium oxide content is 0.05 to 1 wt% of the aluminum oxide.
10. The production method according to claim 8, wherein the oxide raw material powder comprises yttrium oxide and magnesium oxide, wherein the particle size of the yttrium oxide and the magnesium oxide is 0.05 to 0.1 um.
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839777A (en) * | 2022-05-19 | 2022-08-02 | 北京蜂巢世纪科技有限公司 | Intelligent glasses, intelligent wearing system and control method for fall protection of intelligent glasses |
| CN115286400A (en) * | 2022-08-23 | 2022-11-04 | 倪清和 | Free-falling body sintering process of ceramic part |
Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006173433A (en) * | 2004-12-17 | 2006-06-29 | Ube Ind Ltd | Light transforming ceramic compound, and light emitting device using the same |
| JP5509997B2 (en) * | 2010-03-31 | 2014-06-04 | 宇部興産株式会社 | Method for producing ceramic composite for light conversion |
| CN106206910A (en) * | 2015-04-30 | 2016-12-07 | 深圳市光峰光电技术有限公司 | A kind of luminescent ceramic for high power light source and light-emitting device |
| CN107001931A (en) * | 2014-12-12 | 2017-08-01 | 松下知识产权经营株式会社 | Light-emitting device |
| CN107200589A (en) * | 2016-03-18 | 2017-09-26 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of aluminium nitride matrix |
| CN107200588A (en) * | 2016-03-18 | 2017-09-26 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of aluminium nitride matrix |
| CN107200587A (en) * | 2016-03-18 | 2017-09-26 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of aluminium nitride matrix |
| CN107285746A (en) * | 2016-04-12 | 2017-10-24 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of alumina host |
| CN107285745A (en) * | 2016-04-12 | 2017-10-24 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of alumina host |
| CN107805056A (en) * | 2016-09-09 | 2018-03-16 | 深圳市光峰光电技术有限公司 | The preparation method and ceramic composite of ceramic composite, light supply apparatus |
| CN108069710A (en) * | 2016-11-15 | 2018-05-25 | 深圳市光峰光电技术有限公司 | A kind of luminescent ceramic and light-emitting device |
| CN108105604A (en) * | 2016-11-25 | 2018-06-01 | 深圳市光峰光电技术有限公司 | Luminescent ceramic structure and preparation method thereof, related lighting fixtures and projection arrangement |
| CN108300473A (en) * | 2016-08-10 | 2018-07-20 | 深圳市光峰光电技术有限公司 | A kind of Wavelength converter and preparation method thereof, light-emitting device and projection arrangement |
Family Cites Families (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN101311373B (en) * | 2008-04-14 | 2013-01-23 | 山东大学 | Process for synthesizing YAG single crystal nano-powder |
| JP2013056999A (en) * | 2011-09-08 | 2013-03-28 | Covalent Materials Corp | Ceramic composite |
| CN103122248B (en) * | 2013-02-28 | 2014-08-13 | 北京科技大学 | Preparation method of high-performance nearly spherical micro-monocrystalline YAG (Yttrium Aluminum Garnet)-based luminescent material |
| CN105400515A (en) * | 2015-12-02 | 2016-03-16 | 钇铕（上海）新材料有限公司 | Light emitting material and preparation method thereof |
| CN106012017B (en) * | 2016-05-16 | 2018-03-16 | 青岛大学 | A kind of YAG monocrystalline raw powder's production technology |
-
2018
- 2018-10-11 CN CN201811182871.4A patent/CN111039660B/en active Active
-
2019
- 2019-09-26 WO PCT/CN2019/108005 patent/WO2020073811A1/en active Application Filing
Patent Citations (13)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JP2006173433A (en) * | 2004-12-17 | 2006-06-29 | Ube Ind Ltd | Light transforming ceramic compound, and light emitting device using the same |
| JP5509997B2 (en) * | 2010-03-31 | 2014-06-04 | 宇部興産株式会社 | Method for producing ceramic composite for light conversion |
| CN107001931A (en) * | 2014-12-12 | 2017-08-01 | 松下知识产权经营株式会社 | Light-emitting device |
| CN106206910A (en) * | 2015-04-30 | 2016-12-07 | 深圳市光峰光电技术有限公司 | A kind of luminescent ceramic for high power light source and light-emitting device |
| CN107200587A (en) * | 2016-03-18 | 2017-09-26 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of aluminium nitride matrix |
| CN107200588A (en) * | 2016-03-18 | 2017-09-26 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of aluminium nitride matrix |
| CN107200589A (en) * | 2016-03-18 | 2017-09-26 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of aluminium nitride matrix |
| CN107285746A (en) * | 2016-04-12 | 2017-10-24 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of alumina host |
| CN107285745A (en) * | 2016-04-12 | 2017-10-24 | 深圳市绎立锐光科技开发有限公司 | A kind of preparation method and fluorescence associated ceramics of the fluorescence ceramics of alumina host |
| CN108300473A (en) * | 2016-08-10 | 2018-07-20 | 深圳市光峰光电技术有限公司 | A kind of Wavelength converter and preparation method thereof, light-emitting device and projection arrangement |
| CN107805056A (en) * | 2016-09-09 | 2018-03-16 | 深圳市光峰光电技术有限公司 | The preparation method and ceramic composite of ceramic composite, light supply apparatus |
| CN108069710A (en) * | 2016-11-15 | 2018-05-25 | 深圳市光峰光电技术有限公司 | A kind of luminescent ceramic and light-emitting device |
| CN108105604A (en) * | 2016-11-25 | 2018-06-01 | 深圳市光峰光电技术有限公司 | Luminescent ceramic structure and preparation method thereof, related lighting fixtures and projection arrangement |
Non-Patent Citations (1)
| Title |
|---|
| 贺龙飞等: "Ce:YAG荧光玻璃的制备与光学性能", 《材料研究与应用》 * |
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN114839777A (en) * | 2022-05-19 | 2022-08-02 | 北京蜂巢世纪科技有限公司 | Intelligent glasses, intelligent wearing system and control method for fall protection of intelligent glasses |
| CN115286400A (en) * | 2022-08-23 | 2022-11-04 | 倪清和 | Free-falling body sintering process of ceramic part |
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| Publication number | Publication date |
|---|---|
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