CN108527960B - Fluorescent ceramic and sapphire composite ceramic material and preparation method thereof - Google Patents
Fluorescent ceramic and sapphire composite ceramic material and preparation method thereof Download PDFInfo
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- CN108527960B CN108527960B CN201810214408.7A CN201810214408A CN108527960B CN 108527960 B CN108527960 B CN 108527960B CN 201810214408 A CN201810214408 A CN 201810214408A CN 108527960 B CN108527960 B CN 108527960B
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- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
- B32B9/005—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00 comprising one layer of ceramic material, e.g. porcelain, ceramic tile
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- B32B—LAYERED PRODUCTS, i.e. PRODUCTS BUILT-UP OF STRATA OF FLAT OR NON-FLAT, e.g. CELLULAR OR HONEYCOMB, FORM
- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/06—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by the heating method
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B37/00—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding
- B32B37/12—Methods or apparatus for laminating, e.g. by curing or by ultrasonic bonding characterised by using adhesives
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B7/00—Layered products characterised by the relation between layers; Layered products characterised by the relative orientation of features between layers, or by the relative values of a measurable parameter between layers, i.e. products comprising layers having different physical, chemical or physicochemical properties; Layered products characterised by the interconnection of layers
- B32B7/04—Interconnection of layers
- B32B7/12—Interconnection of layers using interposed adhesives or interposed materials with bonding properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B9/00—Layered products comprising a layer of a particular substance not covered by groups B32B11/00 - B32B29/00
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/30—Properties of the layers or laminate having particular thermal properties
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2307/00—Properties of the layers or laminate
- B32B2307/40—Properties of the layers or laminate having particular optical properties
- B32B2307/422—Luminescent, fluorescent, phosphorescent
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- B—PERFORMING OPERATIONS; TRANSPORTING
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- B32B2457/20—Displays, e.g. liquid crystal displays, plasma displays
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Abstract
The invention discloses a fluorescent ceramic and sapphire composite ceramic material and a preparation method thereof. The connecting layer connects the fluorescent ceramic layer with the sapphire layer, and the composite ceramic material is formed by high-temperature sintering; the response wavelength of the fluorescent ceramic layer is 445-465 nm, the connecting layer has a scattering effect on the excitation light source, and the sapphire layer has high heat conductivity and plays a role in heat dissipation. According to the invention, a composite structure is constructed by adopting sapphire and the fluorescent ceramic, so that the heat conduction of the fluorescent ceramic is enhanced, and the laser damage threshold of the ceramic is improved; besides the function of connecting the fluorescent ceramic and the sapphire, the fluorescent powder has the fluorescent characteristic, enhances the luminescence and enhances the scattering of an excitation light source. The invention has simple production process, and is especially suitable for high-power and high-power density laser lighting and display devices and other compact devices.
Description
Technical Field
The invention relates to laser illumination and display technology, in particular to a light conversion and heat dissipation integrated composite ceramic material for a high-power-density laser illumination and display device and a preparation method thereof.
Background
With the rapid development of display technology, mercury lamps and halogen lamps as light sources cannot meet the requirements of high-quality, high-power and high-brightness display due to the defects of high energy consumption, short service life, large volume, high heat and the like. The illumination and display technology based on the light source module using laser ld (laser diode) as an excitation light source and fluorescent material as a light conversion carrier has drawn more and more attention by virtue of high brightness, high light efficiency, miniaturization, wider color gamut and longer service life.
Adapted to high-power excitation light sourcesIn need, the fluorescent materials adopted at present have been gradually developed into fluorescent ceramics with higher thermal conductivity and heat resistance by resin-encapsulated fluorescent powder and glass phosphor. However, this phosphor cannot withstand more than 50W/mm2A laser light source of power density. With the development of compact laser light source devices, the development of fluorescent materials applied to higher laser excitation power density is urgently needed.
Compared with fluorescent ceramic, the sapphire has higher thermal conductivity (32-35W/m.K) and thermal shock resistance, and has very high transmittance, so that the sapphire and the fluorescent ceramic are compounded, and a laser light source enters from the sapphire side, so that the sapphire can bear higher laser power density, and the luminous efficiency of a phosphor is not reduced.
The connection mode of the ceramics comprises the modes of diffusion sintering, middle glue connection, silver glue connection, mechanical connection and the like. However, the surface energy of sapphire is low, and the compactness of sapphire and the fluorescent ceramic is high, so that the sapphire and the fluorescent ceramic cannot be connected in a diffusion sintering mode under the condition of being lower than the sintering temperature of the fluorescent ceramic; the generally adopted bonding material has lower thermal conductivity and thermal stability or lower light transmittance, and the emission of fluorescence excitation light and emitted light cannot meet the requirements of a high-efficiency and high-power-density laser light source; the mechanical connection mode is not only not suitable for micro devices, but also air and the like inevitably exist in the composite ceramic obtained by the mechanical connection mode, and the heat transfer of the ceramic is seriously and negatively influenced.
In order to obtain a higher-quality, miniaturized and compact laser illumination and display product, the laser illumination and display technology is promoted greatly, sapphire and fluorescent ceramic composite structure ceramics are developed, the luminous thermal stability of a fluorescent body is improved, and the heat dissipation performance of the device is enhanced, so that the problem which needs to be solved urgently at present is solved.
Disclosure of Invention
The invention aims to overcome the defects of the existing materials and technologies and provide a fluorescent material, namely a fluorescent ceramic and sapphire composite ceramic material suitable for being excited by a high-power density laser light source and a preparation method thereof, wherein the material has the characteristics of high luminous efficiency, high heat conduction performance, uniform luminescence, high luminous heat stability and the like; the preparation method has simple process and convenient operation.
The specific technical scheme for realizing the purpose of the invention is as follows:
a composite ceramic material of fluorescent ceramic and sapphire is characterized in that the composite ceramic material comprises a fluorescent ceramic layer, a sapphire layer and a connecting layer, wherein the connecting layer is formed by non-continuous fluorescent particles which are dispersed by glass and have the same components as the fluorescent ceramic layer; the connecting layer has a scattering effect on the excitation light source.
The composite ceramic material can be applied to 1-200W/mm2An excitation light source.
The fluorescent ceramic layer responds to blue laser with the wavelength of 445-465 nm and converts the blue laser into yellow and green fluorescence.
The glass is quartz glass, aluminate glass or borate glass.
A preparation method of the composite ceramic material comprises the following specific steps:
step 1: polishing one side of the fluorescent ceramic, wherein the surface roughness is 0.01-0.05 mu m;
step 2: polishing a single surface of the sapphire, wherein the surface roughness is 0.01-0.05 mu m;
and step 3: adopting fluorescent powder with the same components as the fluorescent ceramic, and mixing the fluorescent powder with glass cement according to the mass ratio of 1: 1-2: 1, mixing; the glass cement is prepared from glass powder and epoxy resin according to a mass ratio of 3: 1-2: 1, mixing;
and 4, step 4: uniformly coating the fluorescent powder colloid on one surface of the fluorescent ceramic, and bonding the fluorescent powder colloid with the sapphire;
and 5: placing the bonded composite body in an oven at 60-100 ℃ until the middle layer colloid is cured;
step 6: and sintering the cured composite body in a muffle furnace to obtain the fluorescent ceramic and sapphire composite ceramic material.
And the sintering temperature in the muffle furnace is 1400-1700 ℃.
The invention has the advantages of
1. The fluorescent ceramic and the sapphire are compounded, so that the composite ceramic can bear 1-200W/mm2A laser light source of power density.
2. The invention realizes the connection of the fluorescent ceramic and the sapphire after high-temperature sintering by adding the fluorescent particles which are dispersed by glass and have the same components with the fluorescent ceramic between the fluorescent ceramic and the sapphire.
3. The connecting layer is discontinuous particles after high-temperature calcination, has the same luminescent property as fluorescent ceramic, greatly improves the scattering of a laser light source, and makes emergent light more uniform.
Detailed Description
The present invention will be further described with reference to the following examples.
Example 1
Polishing a single surface of YAG Ce fluorescent ceramic to 0.15mm thick, wherein the surface roughness is 0.01 mu m; polishing a single surface of the sapphire to 0.2mm, wherein the surface roughness is 0.01 mu m; weighing 1g of YAG, Ce fluorescent powder, 1g of quartz glass powder and 0.5 g of epoxy resin, and uniformly mixing to obtain a fluorescent powder colloid; uniformly coating the fluorescent powder colloid on a fluorescent ceramic polishing surface, and then bonding the fluorescent powder colloid with sapphire; placing the complex in a 100 ℃ oven, and drying for 2 hours until the middle layer colloid is solidified; and sintering the cured composite body in a high-temperature muffle furnace at 1400 ℃ to obtain the fluorescent ceramic and sapphire composite ceramic material. The power density is 5W/mm2The light intensity of the ceramic is 3050 lm.
Example 2
Polishing a single surface of YAG Ce fluorescent ceramic to 0.15mm thick, wherein the surface roughness is 0.02 mu m; polishing a single surface of the sapphire to 0.2mm, wherein the surface roughness is 0.04 mu m; weighing 2 g of YAG (yttrium aluminum garnet) and Ce fluorescent powder, 1g of quartz glass powder and 0.4 g of epoxy resin, and uniformly mixing to obtain a fluorescent powder colloid; uniformly coating the fluorescent powder colloid on one surface of the fluorescent ceramic, and then bonding the fluorescent powder colloid with the sapphire; placing the complex in an oven at 60 ℃ and drying for 2 hours until the middle layer colloid is solidified(ii) a And sintering the cured composite body in a high-temperature muffle furnace at 1550 ℃ to obtain the fluorescent ceramic and sapphire composite ceramic material. The adopted power density is 100W/mm2The ceramic light intensity is 3102 lm.
Example 3
Polishing the single surface of LuAG and Ce fluorescent ceramic to 0.25 mm, wherein the surface roughness is 0.04 mu m; polishing a single surface of the sapphire to 0.2mm, wherein the surface roughness is 0.01 mu m; weighing 1.5 g of YAG (yttrium aluminum garnet) and Ce fluorescent powder, 1g of quartz glass powder and 0.5 g of epoxy resin, and uniformly mixing to obtain a fluorescent powder colloid; uniformly coating the fluorescent powder colloid on one surface of the fluorescent ceramic, and then bonding the fluorescent powder colloid with the sapphire; placing the complex in an oven at 80 ℃, and drying for 2 hours until the middle layer colloid is solidified; and sintering the cured composite body in a high-temperature muffle furnace at 1650 ℃ to obtain the fluorescent ceramic and sapphire composite ceramic material. The power density is 200W/mm2The light intensity of the ceramic is 2905 lm.
Claims (6)
1. The utility model provides a fluorescent ceramic and sapphire composite ceramic material, its characterized in that, this composite ceramic material includes fluorescent ceramic layer, sapphire layer and articulamentum, and the articulamentum is connected fluorescent ceramic layer and sapphire layer, and high temperature sintering forms composite ceramic material, articulamentum is the discontinuous fluorescent particle of glass dispersion, has the scattering effect to the excitation light source.
2. The fluorescent ceramic and sapphire composite ceramic material as claimed in claim 1, wherein the composite ceramic material can be applied to 50-200W/mm2An excitation light source.
3. The fluorescent ceramic and sapphire composite ceramic material as claimed in claim 1, wherein the fluorescent ceramic layer responds to blue laser with wavelength of 445-465 nm and converts the blue laser into yellow and green fluorescence.
4. The composite ceramic material of claim 1, wherein the glass is quartz glass, aluminate glass or borate glass.
5. A method for preparing the fluorescent ceramic and sapphire composite ceramic material as claimed in claim 1, which comprises the following steps:
step 1: polishing one side of the fluorescent ceramic, wherein the surface roughness is 0.01-0.05 mu m;
step 2: polishing a single surface of the sapphire, wherein the surface roughness is 0.01-0.05 mu m;
and step 3: mixing fluorescent powder with the same components as the fluorescent ceramic with glass cement according to the mass ratio of 1-2: 1 to obtain fluorescent powder colloid; the glass cement is prepared by mixing glass powder and epoxy resin according to the mass ratio of 3-2: 1;
and 4, step 4: uniformly coating the fluorescent powder colloid on one surface of the fluorescent ceramic, and bonding the fluorescent powder colloid with the sapphire;
and 5: placing the bonded composite body in an oven at 60-100 ℃ until the middle layer colloid is cured;
step 6: and sintering the cured composite body in a muffle furnace to obtain the fluorescent ceramic and sapphire composite ceramic material.
6. The method for preparing the fluorescent ceramic and sapphire composite ceramic material according to claim 5, wherein the sintering temperature in the muffle furnace is 1400-1700 ℃.
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| CN201810214408.7A CN108527960B (en) | 2018-03-15 | 2018-03-15 | Fluorescent ceramic and sapphire composite ceramic material and preparation method thereof |
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| CN201810214408.7A CN108527960B (en) | 2018-03-15 | 2018-03-15 | Fluorescent ceramic and sapphire composite ceramic material and preparation method thereof |
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| CN108527960A CN108527960A (en) | 2018-09-14 |
| CN108527960B true CN108527960B (en) | 2020-10-16 |
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| CN112624752A (en) * | 2020-12-22 | 2021-04-09 | 新沂市锡沂高新材料产业技术研究院有限公司 | Composite fluorescent ceramic and high-brightness LED (light-emitting diode) lighting source |
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|---|---|---|---|---|
| EP1030378A2 (en) * | 1999-02-19 | 2000-08-23 | Murata Manufacturing Co., Ltd. | Semiconductor luminescent element and method of manufacturing the same |
| CN102881808A (en) * | 2011-07-12 | 2013-01-16 | 信源陶磁股份有限公司 | Sapphire fluorescent plate and manufacturing method thereof |
| CN105693108A (en) * | 2016-01-13 | 2016-06-22 | 南京大学 | Preparation and application of reflecting type fluorescent glass light conversion assembly |
| CN106476117A (en) * | 2016-10-10 | 2017-03-08 | 东莞华晶粉末冶金有限公司 | A kind of method inlaying sapphire glass in zirconia ceramicss |
| CN107056068A (en) * | 2017-03-29 | 2017-08-18 | 广东工业大学 | Glass material, fluorescent glass ceramic material and preparation method thereof |
Family Cites Families (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN102434853B (en) * | 2011-10-25 | 2016-03-16 | 深圳市光峰光电技术有限公司 | Optical wavelength conversion chip, its preparation method and use the light source of this optical wavelength conversion chip |
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Patent Citations (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| EP1030378A2 (en) * | 1999-02-19 | 2000-08-23 | Murata Manufacturing Co., Ltd. | Semiconductor luminescent element and method of manufacturing the same |
| CN102881808A (en) * | 2011-07-12 | 2013-01-16 | 信源陶磁股份有限公司 | Sapphire fluorescent plate and manufacturing method thereof |
| CN105693108A (en) * | 2016-01-13 | 2016-06-22 | 南京大学 | Preparation and application of reflecting type fluorescent glass light conversion assembly |
| CN106476117A (en) * | 2016-10-10 | 2017-03-08 | 东莞华晶粉末冶金有限公司 | A kind of method inlaying sapphire glass in zirconia ceramicss |
| CN107056068A (en) * | 2017-03-29 | 2017-08-18 | 广东工业大学 | Glass material, fluorescent glass ceramic material and preparation method thereof |
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Inventor after: Li Huili Inventor after: Guo Junsong Inventor before: Li Huili Inventor before: Hu Song Inventor before: Zhou Jixin Inventor before: Guo Junsong |