CN111285684A - Fluorescent ceramic with surface artificial microstructure for white light laser illumination and preparation method thereof - Google Patents
Fluorescent ceramic with surface artificial microstructure for white light laser illumination and preparation method thereof Download PDFInfo
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- 239000000919 ceramic Substances 0.000 title claims abstract description 65
- 238000005286 illumination Methods 0.000 title claims abstract description 24
- 238000002360 preparation method Methods 0.000 title abstract description 12
- 239000000126 substance Substances 0.000 claims abstract description 8
- 229910052688 Gadolinium Inorganic materials 0.000 claims abstract description 5
- 229910052765 Lutetium Inorganic materials 0.000 claims abstract description 5
- 229910052777 Praseodymium Inorganic materials 0.000 claims abstract description 5
- 229910052772 Samarium Inorganic materials 0.000 claims abstract description 5
- 229910052771 Terbium Inorganic materials 0.000 claims abstract description 5
- 229910052746 lanthanum Inorganic materials 0.000 claims abstract description 5
- 239000000203 mixture Substances 0.000 claims description 7
- 235000015895 biscuits Nutrition 0.000 claims description 6
- 239000000843 powder Substances 0.000 claims description 6
- 238000000034 method Methods 0.000 claims description 5
- 239000002994 raw material Substances 0.000 claims description 5
- LFQSCWFLJHTTHZ-UHFFFAOYSA-N Ethanol Chemical compound CCO LFQSCWFLJHTTHZ-UHFFFAOYSA-N 0.000 claims description 3
- 238000009694 cold isostatic pressing Methods 0.000 claims description 3
- 238000005245 sintering Methods 0.000 claims description 3
- 238000000137 annealing Methods 0.000 claims description 2
- 238000000498 ball milling Methods 0.000 claims description 2
- 238000001035 drying Methods 0.000 claims description 2
- 238000005530 etching Methods 0.000 claims description 2
- 238000000465 moulding Methods 0.000 claims description 2
- 239000002245 particle Substances 0.000 claims description 2
- 238000005498 polishing Methods 0.000 claims description 2
- 238000004321 preservation Methods 0.000 claims description 2
- 238000007873 sieving Methods 0.000 claims description 2
- 230000002093 peripheral effect Effects 0.000 abstract description 3
- 230000009286 beneficial effect Effects 0.000 abstract description 2
- 239000004065 semiconductor Substances 0.000 abstract description 2
- 238000010586 diagram Methods 0.000 description 4
- 238000009826 distribution Methods 0.000 description 4
- 238000005516 engineering process Methods 0.000 description 3
- 239000000463 material Substances 0.000 description 3
- OAICVXFJPJFONN-UHFFFAOYSA-N Phosphorus Chemical compound [P] OAICVXFJPJFONN-UHFFFAOYSA-N 0.000 description 2
- 230000005284 excitation Effects 0.000 description 2
- PNEYBMLMFCGWSK-UHFFFAOYSA-N aluminium oxide Inorganic materials [O-2].[O-2].[O-2].[Al+3].[Al+3] PNEYBMLMFCGWSK-UHFFFAOYSA-N 0.000 description 1
- 238000006243 chemical reaction Methods 0.000 description 1
- 150000001875 compounds Chemical class 0.000 description 1
- 229910052593 corundum Inorganic materials 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 238000003825 pressing Methods 0.000 description 1
- 238000005303 weighing Methods 0.000 description 1
- 229910001845 yogo sapphire Inorganic materials 0.000 description 1
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Abstract
The invention discloses a fluorescent ceramic with a surface artificial microstructure for white light laser illumination and a preparation method thereof, wherein the fluorescent ceramic comprises the following chemical components: (Ce)xMyY1‑x‑y)3Al5O12Wherein, M is one or more of Gd, La, Pr, Sm, Tb and Lu, and the value range of x is as follows: x is more than or equal to 0.001 and less than or equal to 0.03, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 1; at least one surface of the fluorescent ceramic is provided with an artificial microstructure. The invention has the beneficial effects that: the invention provides a fluorescent ceramicWhite light can be obtained using a blue laser semiconductor as a laser light source. The fluorescent ceramic provided by the invention can solve the problems of white central area and yellow peripheral area of light spot in a laser lighting product through the design of the surface microstructure.
Description
Technical Field
The invention relates to the field of fluorescent materials for laser illumination, in particular to fluorescent ceramic with a surface artificial microstructure for white light laser illumination and a preparation method thereof.
Background
The technology of obtaining white light by exciting a yellow phosphor by blue Laser (LD) receives more and more attention with the development of the blue laser diode technology, and the focus of the current fluorescent material is mainly on the aspects of improving the bearing capacity of the blue light irradiation density, improving the light conversion efficiency of the fluorescent material and the like.
With the successive appearance and development of laser lighting display products such as laser car lamps, laser projectors, laser search lamps and the like, laser technology is increasingly applied to the field of lighting display.
The fluorescent ceramic and the LED chip emit light at 360 degrees, the light emitting characteristic of the fluorescent ceramic and the LED chip is similar to that of a lambertian body, the light intensity distribution is uniform in space, and when the blue LED is used as an excitation light source, the yellow light emitting angle emitted by the blue light and the fluorophor is consistent with the light intensity distribution, so that relatively uniform white light spots can be obtained. The laser light source has an extremely narrow emission angle compared with the LED light source, and when a blue laser is used as an excitation light source, the emission angle and the light intensity distribution of the blue light are concentrated, and the emission angle and the light intensity distribution of the yellow light emitted from the phosphor are dispersed. Resulting in a spot having a central area "white" and a peripheral area "yellow".
Disclosure of Invention
People always expect to solve the problem that in the prior art, excited yellow light and blue light reflected from the interior of ceramic are compounded into white light, and the compounded light shows a phenomenon of yellow surrounding the middle white, but the success is not achieved all the time. The invention provides a fluorescent ceramic with a surface artificial microstructure for white light laser illumination and a preparation method thereof, which can effectively relieve the problem of yellow surrounding areas so as to compound uniform white light.
The technical scheme of the invention is realized as follows: a fluorescent ceramic with surface artificial microstructures for white light laser illumination, wherein the chemical composition of the fluorescent ceramic is as follows: (Ce)xMyY1-x-y)3Al5O12Wherein, M is one or more of Gd, La, Pr, Sm, Tb and Lu, and the value range of x is as follows: x is more than or equal to 0.001 and less than or equal to 0.03, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 1; at least one surface of the fluorescent ceramic is provided with an artificial microstructure.
As a preferred scheme of the fluorescent ceramic with the surface artificial microstructure for white light laser illumination, the value range of x is as follows: x is more than or equal to 0.002 and less than or equal to 0.008, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 0.5.
As a preferred scheme of the fluorescent ceramic with the surface artificial microstructure for white light laser illumination, the artificial microstructure is bulges or concave holes which are distributed on the surface of the fluorescent ceramic.
As a preferable scheme of the fluorescent ceramic with the surface artificial microstructure for white light laser illumination, the bulges or the concave holes are cylindrical, hemispherical or conical.
As a preferable scheme of the fluorescent ceramic with the surface artificial microstructure for white light laser illumination, the height of the artificial microstructure is 10-200 μm.
As a preferable scheme of the fluorescent ceramic with the surface artificial microstructure for white light laser illumination, the height of the artificial microstructure is 50-150 μm.
The invention also provides a preparation method of the fluorescent ceramic with the surface artificial microstructure for white light laser illumination, which is used for preparing the fluorescent ceramic and comprises the following steps,
step S1, according to the chemical composition of the fluorescent ceramic: (Ce)xMyY1-x-y)3Al5O12Wherein, M is one or more of Gd, La, Pr, Sm, Tb and Lu, and the value range of x is as follows: x is more than or equal to 0.001 and less than or equal to 0.03, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 1, and raw material powder is weighed;
step S2, performing wet ball milling, using absolute ethyl alcohol as a medium, enabling the particle size of raw material powder to be less than 0.5 mu m, and performing drying, sieving, molding and cold isostatic pressing to obtain a ceramic biscuit; and the number of the first and second groups,
step S3, placing the ceramic biscuit into a vacuum sintering furnace 1650 and 1750 ℃, and annealing after heat preservation for 4-20h to obtain fluorescent ceramic with the thickness of 0.2-0.5 mm;
wherein, the artificial microstructure formed on the surface of the fluorescent ceramic is molded by using a mold in step S2, or is processed by etching and stamping after step S3 is completed.
As a preferable scheme of the preparation method of the fluorescent ceramic with the surface artificial microstructure for white light laser illumination, the method also comprises the following steps,
and step S4, thinning or polishing the surface without the artificial microstructure in the fluorescent ceramic.
As a preferred scheme of the preparation method of the fluorescent ceramic with the surface artificial microstructure for white light laser illumination, in step S1, the value range of x is as follows: x is more than or equal to 0.002 and less than or equal to 0.008, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 0.5.
Compared with the prior art, the invention has the beneficial effects that: the fluorescent ceramic provided by the invention can obtain white light by using a blue laser semiconductor as a laser light source. The fluorescent ceramic provided by the invention can solve the problems of white central area and yellow peripheral area of light spot in a laser lighting product through the design of the surface microstructure.
Drawings
Fig. 1 is a schematic structural diagram of embodiment 1 of the present invention.
Fig. 2 is a schematic structural diagram of embodiment 2 of the present invention.
Fig. 3 is a schematic structural diagram of embodiment 3 of the present invention.
Fig. 4 is a schematic structural diagram of embodiment 4 of the present invention.
Detailed Description
The present invention will be described in further detail below with reference to specific embodiments and drawings.
Example 1:
the preparation method of the fluorescent ceramic in the embodiment comprises the following steps:
the selected fluorescent ceramic chemistry is: (Ce)0.001Y0.999)3Al5O12Weighing CeO according to the stoichiometric ratio2、Y2O3、Al2O3The powder raw material is dried and sieved after being ball-milled for 10 hours by a wet method by using absolute ethyl alcohol as a medium.
Pressing the powder by using a die head with a concave hemispherical die, keeping the pressure at 15MPa for 30s, and performing cold isostatic pressing at 150MPa to obtain a ceramic biscuit.
And (3) putting the ceramic biscuit into a vacuum sintering furnace, and preserving the heat at 1700 ℃ for 20 hours to obtain the fluorescent ceramic with the thickness of 0.3mm, wherein the size of the microstructure is 20 mu m of the diameter of the hemisphere. See fig. 1.
Example 2:
the preparation method of the fluorescent ceramic of the embodiment is the same as that of the embodiment one, and the difference is that: the chemical composition of the fluorescent ceramic selected in the present example is (Ce)0.001Gd0.35Y0.649)3Al5O12The die head structure of the die is concave conical, the thickness of the obtained fluorescent ceramic is 0.3mm, and the size of the microstructure is 50 μm of the diameter of the bottom surface of the cone. See fig. 2.
Example 3:
the preparation method of the fluorescent ceramic of the embodiment is the same as that of the embodiment one, and the difference is that: the chemical composition of the fluorescent ceramic selected in the present example is (Ce)0.008Y0.992)3Al5O12The structure of the die head of the die is a convex cylinder, the thickness of the obtained fluorescent ceramic is 0.5mm, and the size of the microstructure is 50 μm of the diameter of the cylinder. See fig. 3.
Example 4:
the preparation method of the fluorescent ceramic of the embodiment is the same as that of the embodiment one, and the difference is that: the chemical composition of the fluorescent ceramic selected in the present example is (Ce)0.008Y0.992)3Al5O12The die head structure of the die is concave and hemispherical, the thickness of the obtained fluorescent ceramic is 0.5mm, and the size of the microstructure is 10mm of the diameter of a cylinder. See fig. 4.
The foregoing merely represents embodiments of the present invention, which are described in some detail and detail, and therefore should not be construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.
Claims (9)
1. A fluorescent ceramic with surface artificial microstructures for white light laser illumination is characterized in that the chemical composition of the fluorescent ceramic is as follows: (Ce)xMyY1-x-y)3Al5O12Wherein, M is one or more of Gd, La, Pr, Sm, Tb and Lu, and the value range of x is as follows: x is more than or equal to 0.001 and less than or equal to 0.03, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 1; at least one surface of the fluorescent ceramic is provided with an artificial microstructure.
2. The fluorescent ceramic with the surface artificial microstructure for the white light laser illumination device according to claim 1, wherein the value range of x is as follows: x is more than or equal to 0.002 and less than or equal to 0.008, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 0.5.
3. The fluorescent ceramic with surface artificial microstructure for white light laser illumination of claim 1 or 2, wherein the artificial microstructure is protrusions or concave holes distributed on the surface of the fluorescent ceramic.
4. The fluorescent ceramic with surface artificial microstructure for white light laser illumination of claim 3, wherein the protrusions or recesses are cylindrical, hemispherical or conical.
5. The fluorescent ceramic with surface artificial microstructure for white light laser illumination according to claim 1 or 3, wherein the height of the artificial microstructure is 10-200 μm.
6. The fluorescent ceramic with surface artificial microstructures for white light laser illumination of claim 5, wherein the height of the artificial microstructures is 50-150 μm.
7. A method for preparing fluorescent ceramic with surface artificial microstructure for white light laser illumination, which is used for preparing the fluorescent ceramic of any one of claims 1 to 6, and is characterized by comprising the following steps,
step S1, according to the chemical composition of the fluorescent ceramic: (Ce)xMyY1-x-y)3Al5O12Wherein, M is one or more of Gd, La, Pr, Sm, Tb and Lu, and the value range of x is as follows: x is more than or equal to 0.001 and less than or equal to 0.03, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 1, and raw material powder is weighed;
step S2, performing wet ball milling, using absolute ethyl alcohol as a medium, enabling the particle size of raw material powder to be less than 0.5 mu m, and performing drying, sieving, molding and cold isostatic pressing to obtain a ceramic biscuit; and the number of the first and second groups,
step S3, placing the ceramic biscuit into a vacuum sintering furnace 1650 and 1750 ℃, and annealing after heat preservation for 4-20h to obtain fluorescent ceramic with the thickness of 0.2-0.5 mm;
wherein, the artificial microstructure formed on the surface of the fluorescent ceramic is molded by using a mold in step S2, or is processed by etching and stamping after step S3 is completed.
8. The method for preparing fluorescent ceramic with surface artificial microstructure for white light laser illumination according to claim 7, further comprising,
and step S4, thinning or polishing the surface without the artificial microstructure in the fluorescent ceramic.
9. The method for preparing the fluorescent ceramic with the surface artificial microstructure for white light laser illumination according to claim 7, wherein in step S1, the value range of x is as follows: x is more than or equal to 0.002 and less than or equal to 0.008, and the value range of y is as follows: y is more than or equal to 0 and less than or equal to 0.5.
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
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| WO2023057344A1 (en) * | 2021-10-04 | 2023-04-13 | Ams-Osram International Gmbh | Blue photon coupling improvement in layer-structured ceramic converter |
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| CN108530070A (en) * | 2018-04-16 | 2018-09-14 | 中国科学院上海硅酸盐研究所 | A kind of fluorescence ceramics and preparation method thereof that the enhancing of surface light trapping structure is luminous |
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| CN105400514A (en) * | 2015-11-12 | 2016-03-16 | 西安交通大学 | Ordered patterned remote fluorescent crystal material as well as preparation method and application thereof |
| CN108395222A (en) * | 2018-03-15 | 2018-08-14 | 江苏瓷光光电有限公司 | A kind of reflective laser, which is shown, uses up conversion, heat-radiating integrated ceramic material and preparation method thereof |
| CN108530070A (en) * | 2018-04-16 | 2018-09-14 | 中国科学院上海硅酸盐研究所 | A kind of fluorescence ceramics and preparation method thereof that the enhancing of surface light trapping structure is luminous |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2023057344A1 (en) * | 2021-10-04 | 2023-04-13 | Ams-Osram International Gmbh | Blue photon coupling improvement in layer-structured ceramic converter |
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Application publication date: 20200616 |