CN102344286A - Aluminum nitride ceramic radiating fin and manufacturing method thereof - Google Patents
Aluminum nitride ceramic radiating fin and manufacturing method thereof Download PDFInfo
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- CN102344286A CN102344286A CN2010102449869A CN201010244986A CN102344286A CN 102344286 A CN102344286 A CN 102344286A CN 2010102449869 A CN2010102449869 A CN 2010102449869A CN 201010244986 A CN201010244986 A CN 201010244986A CN 102344286 A CN102344286 A CN 102344286A
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Abstract
The invention discloses an aluminum nitride ceramic radiating fin and a manufacturing method thereof. The manufacturing method mainly comprises the step of manufacturing the aluminum nitride ceramic radiating fin with high thickness and low shrinkage by using aluminum nitride powder with larger particle size or an aluminum nitride composite. The specific gravity of the radiating fin obtained by the manufacturing method is substantially between 1.4 and 2.2, the radiating fin can be fin-shaped or flat plate-shaped, and the average thickness is substantially between 1mm and 2cm.
Description
Technical field
The invention relates to a kind of aluminium nitride AlN (AlN) ceramic heat-dissipating sheet and its method of manufacture.Particularly relevant for a kind of aluminium nitride ceramics radiator element and its method of manufacture of high thickness.
Background technology
Along with making rapid progress of science and technology, electronics and photovoltaic are all towards light, thin, short, little and high-power trend development.So development will make the heat generation density of electronics and photovoltaic improve thereupon, thereby electronics and photovoltaic are for the demand of dispelling the heat also significantly increase.For example: photodiode (Light Emitting Diode; The heat energy that is produced when LED) luminous will make LED knot surface temperature too high, and then influence product life cycle, luminous efficiency, stability, and LED is tied surface temperature, luminous efficiency and the relation between the life-span if can't derive.Therefore, necessary finned device to electronics and photovoltaic are to improve the problem of heat radiation.
The kind of radiator element mainly contains two types of metal fin and ceramic heat-dissipating sheets.Metal fin system is a material with aluminium or copper, and ceramic heat-dissipating sheet system uses materials such as aluminum oxide, silit (SiC), aluminium nitride AlN.Still need during the applied metal radiator element processing of insulation layer, and the ceramic heat-dissipating sheet itself is an isolator, so do not need the processing of insulation layer.In addition, the matched coefficients of thermal expansion property of ceramic heat-dissipating sheet is good, and can reduce thermal stresses and thermal distortion generation also is one of its advantage.
Because aluminium nitride AlN has unique physical property, for example: approach metal and decuple the high heat conductance of aluminum oxide; Low thermal coefficient of expansion and the high electric insulation property that can compare mutually with silicon and silit; Good heat-shock resistance; The physical strength suitable with alumina ceramic material; Good erosion resistance is so aluminium nitride AlN has become in order to make the considerable heat sink material of ceramic heat-dissipating sheet.Yet the aluminium nitride ceramics radiator element of convention system uses particle diameter less than 2 microns powder, and its proportion is 3.26, and shrinking percentage is greater than 10%.Because the shrinking percentage of the aluminium nitride ceramics radiator element of convention is too big, when making the bigger radiator element of thickness, the phenomenon of warpage takes place easily, thereby cause the too low problem of yield.In addition, it is the aluminium nitride ceramics radiator element below 1 millimeter (mm) that known techniques can only be produced thickness usually, can't satisfy the radiating requirements of increasingly sophisticated and diversified electronics and photovoltaic.
In view of this, need a kind of method that produces the aluminium nitride ceramics radiator element of high thickness and low-shrinkage at present badly.
Summary of the invention
One object of the present invention just provides the method for manufacture of aluminium nitride ceramics radiator element, uses the aluminium nitride ceramics radiator element that produces high thickness and low-shrinkage.
According to above-mentioned purpose of the present invention, a kind of method of manufacture of aluminium nitride ceramics radiator element is proposed.In the method for manufacture of this aluminium nitride ceramics radiator element, at first preparation includes the aluminium nitride AlN mixture of sintering aid, and wherein the weight ratio of sintering aid in the aluminium nitride AlN mixture is that essence is between 2% to 9%.Then; Filter this aluminium nitride AlN mixture; To sift out the first aluminium nitride AlN mixture with first median size, the 3rd aluminium nitride AlN mixture that has the second aluminium nitride AlN mixture of second median size and have the 3rd median size respectively; Wherein first median size be essence between 30 microns to 80 microns, the weight ratio of the first aluminium nitride AlN mixture in the aluminium nitride AlN mixture is that essence is between 50% to 75%; Second median size be essence between 10 microns to 29 microns, the weight ratio of the second aluminium nitride AlN mixture in this aluminium nitride AlN mixture is that essence is between 10% to 30%; The 3rd median size be essence between 3 microns to 9 microns, the weight ratio of the 3rd aluminium nitride AlN mixture in the aluminium nitride AlN mixture is that essence is between 10% to 20%.Then; The first aluminium nitride AlN mixture, the second aluminium nitride AlN mixture, the 3rd aluminium nitride AlN mixture, softening agent and cakingagent are mixed stirring and obtain a mixture, and wherein the weight ratio of summation in mixture of the first aluminium nitride AlN mixture, the second aluminium nitride AlN mixture and the 3rd aluminium nitride AlN mixture is that essence is between 73% to 90%; The weight ratio of softening agent in mixture is that essence is between 3% to 12%; The weight ratio of cakingagent in mixture is that essence is between 5% to 15%.Then, make the screen cloth of the preset mesh number (Mesh) of apparatus this mixture that sieves, and obtain the particulate mixture through this screen cloth, wherein preset mesh number system essence is between 20 orders (mesh) to 120 orders.Then, with the particulate mixture pressing mold, penetrate or be extrusion-molded into a radiator element and give birth to embryo, continue the sintering radiator element in a sintering temperature again and give birth to embryo, and obtain a radiator element through a Preset Time.
According to another embodiment of the present invention; In a kind of method of manufacture of aluminium nitride ceramics radiator element; At first will have first aluminum nitride powder of first median size, the 3rd aluminum nitride powder that has second aluminum nitride powder of second median size and have the 3rd median size is mixed into the aluminum nitride powder mixture; Wherein first median size be essence between 30 microns to 80 microns, the weight ratio of first aluminum nitride powder in the aluminum nitride powder mixture is that essence is between 50% to 75%; Second median size be essence between 10 microns to 29 microns, the weight ratio of second aluminum nitride powder in the aluminum nitride powder mixture is that essence is between 10% to 30%; The 3rd median size be essence between 3 microns to 9 microns, the weight ratio of the 3rd aluminum nitride powder in this aluminum nitride powder mixture is that essence is between 10% to 20%.Then, add in sintering aid to the aluminum nitride powder mixture and obtain first mixture, wherein the weight ratio of sintering aid in first mixture is that essence is between 2% to 9%.Then, first mixture, softening agent and cakingagent are mixed stirring and obtain second mixture, wherein the weight ratio of first mixture in second mixture is that essence is between 73% to 90%; The weight ratio of softening agent in second mixture is that essence is between 3% to 12%; The weight ratio of cakingagent in second mixture is that essence is between 5% to 15%.Then, make the screen cloth of the preset mesh number of apparatus second mixture that sieves, and obtain the particulate mixture through screen cloth, wherein preset mesh number system essence is between 20 order to 100 orders.Then, with the particulate mixture pressing mold, penetrate or be extrusion-molded into a radiator element and give birth to embryo, continue the sintering radiator element in a sintering temperature again and give birth to embryo, and obtain a radiator element through a Preset Time.
According to the proportion of the prepared radiator element of the above embodiment of the present invention be essence between 1.4 to 2.2, it is shaped as for example fin type or flat board, mean thickness is that essence is between 1 millimeter (mm) is to 2 centimeters.
Therefore, the method for manufacture by the aluminium nitride ceramics radiator element of embodiments of the invention can provide the aluminium nitride ceramics radiator element of high thickness and low-shrinkage, and have good yield.
Description of drawings
For letting above and other objects of the present invention, characteristic, advantage and the embodiment can be more obviously understandable, appended graphic explanation be following:
Fig. 1 system illustrates the schematic flow sheet according to the aluminium nitride ceramics manufacturing method of heat sink of one embodiment of the invention.
Fig. 2 A system illustrates the structural representation according to the aluminium nitride ceramics radiator element of one embodiment of the invention.
Fig. 2 B system illustrates the structural representation according to the aluminium nitride ceramics radiator element of another embodiment of the present invention.
Fig. 3 system illustrates the schematic flow sheet according to the aluminium nitride ceramics manufacturing method of heat sink of another embodiment of the present invention.
[primary clustering nomenclature]
10: fin type radiator element
12: fin type radiator element
20: fin
22: fin
100: preparation includes the aluminium nitride AlN mixture of sintering aid
110: filter the aluminium nitride AlN mixture to sift out first, second, third aluminium nitride AlN mixture respectively
120: mix first, second, third aluminium nitride AlN mixture, softening agent and cakingagent resulting mixture
130: sieve mixture and obtain particulate mixture
140: with the particulate mixture pressing mold, penetrate or be extrusion-molded into radiator element and give birth to embryo
150: continue the sintering radiator element and give birth to embryo and obtain radiator element
160: radiator element is lowered the temperature naturally or continued to be cooled to normal temperature
200: mix first, second, third aluminum nitride powder and become the aluminum nitride powder mixture
210: add in sintering aid to the aluminum nitride powder mixture and obtain first mixture
220: mix first mixture, softening agent and cakingagent and become second mixture
230: sieve second mixture and obtain particulate mixture
240: with the particulate mixture pressing mold, penetrate or be extrusion-molded into radiator element and give birth to embryo
250: continue the sintering radiator element and give birth to embryo and obtain radiator element
260: radiator element is lowered the temperature naturally or continued to be cooled to normal temperature
Embodiment
Embodiments of the invention mainly are to use bigger aluminum nitride powder of particle diameter or aluminium nitride AlN mixture to come manufacturing radiating fins, use the aluminium nitride ceramics radiator element that produces high thickness and low-shrinkage.So-called " aluminium nitride AlN mixture " is with aluminium powder, aluminium nitride AlN, and for example behind the sintering aid uniform mixing of yttrium oxide, processes through for example combustion synthesis reaction again.The method and apparatus of making the aluminium nitride AlN mixture can be referring to case before TaiWan, China patent I297672 number " compound method of aluminium nitride AlN and its mixture ", but embodiments of the invention are also not subject to the limits.As for employed device in the enforcement of the present invention, for example: stir companion's machine, screen cloth, shaper, sintering oven etc., be all conventional devices, so do not give unnecessary details at this.
Embodiment 1: use aluminium nitride AlN mixture, softening agent and cakingagent.
Please with reference to Fig. 1, it illustrates the schematic flow sheet according to the aluminium nitride ceramics manufacturing method of heat sink of one embodiment of the invention.At first; Preparation includes the aluminium nitride AlN mixture (step 100) of sintering aid; Wherein the weight ratio of sintering aid in the aluminium nitride AlN mixture be essence between 2% to 9%, and for example can be: yttrium oxide, quicklime, Natural manganese dioxide, Lithium Oxide 98min, aluminum oxide, titanium oxide, Neodymium trioxide, Samarium trioxide, dysprosium oxide, lime carbonate, magnesiumcarbonate, Quilonum Retard or Calcium Fluoride (Fluorspan) with and composition thereof the group that formed.Then; Use the screen cloth of for example different mesh numbers to filter this aluminium nitride AlN mixture (step 110); To sift out the first aluminium nitride AlN mixture with first median size, the 3rd aluminium nitride AlN mixture that has the second aluminium nitride AlN mixture of second median size and have the 3rd median size respectively; Wherein first median size be essence between 30 microns to 80 microns, the weight ratio of the first aluminium nitride AlN mixture in the aluminium nitride AlN mixture is that essence is between 50% to 75%; Second median size be essence between 10 microns to 29 microns, the weight ratio of the second aluminium nitride AlN mixture in this aluminium nitride AlN mixture is that essence is between 10% to 30%; The 3rd median size be essence between 3 microns to 9 microns, the weight ratio of the 3rd aluminium nitride AlN mixture in the aluminium nitride AlN mixture is that essence is between 10% to 20%.Then; The first aluminium nitride AlN mixture, the second aluminium nitride AlN mixture, the 3rd aluminium nitride AlN mixture, softening agent and cakingagent are mixed stirring (step 120); And obtain a mixture, wherein the weight ratio of summation in mixture of the first aluminium nitride AlN mixture, the second aluminium nitride AlN mixture and the 3rd aluminium nitride AlN mixture is that essence is between 73% to 90%; The weight ratio of softening agent in mixture is that essence is between 3% to 12%; The weight ratio of cakingagent in mixture is that essence is between 5% to 15%.Softening agent (plasticizer) for example can be: silicone oil, adipic acid ester, ester of phthalic acid, paraffin or white cured oil, cakingagent for example can be: lignocellulose, vinyl cellulose, polyvinyl butyral acetal (Polyvinyl Butyral), Vilaterm, Vestolen PP 7052, acryl or resin.
Then, make the screen cloth of the preset mesh number of apparatus this mixture (step 130) that sieves, and obtain the particulate mixture through this screen cloth, wherein preset mesh number system essence is between 20 order to 120 orders.Then; With the particulate mixture pressing mold, penetrate or be extrusion-molded into a radiator element and give birth to embryo (step 140); In the sintering oven of tool one sintering temperature, continue the sintering radiator element and give birth to embryo, and obtain a radiator element again through one section Preset Time (step 150); Wherein Preset Time be essence between 1.5 hours to 3 hours, sintering temperature is that essence is between 1750 ℃ to 1950 ℃.Before carry out step 150, the heating curve of sintering oven for example can be: the speed with 2～4 ℃ of PM intensifications rises to 1200 ℃ by normal temperature earlier; Speed with 1～3 ℃ of PM intensification rises to 1850 ℃ by 1200 ℃ again.Then, carry out step 150, to keep 1850 ℃ temperature through 1.5 hours～3 hours.Then, radiator element is lowered the temperature naturally or continue to be cooled to normal temperature (step 160).Proportion according to the prepared radiator element of present embodiment is that essence is between 1.4 to 2.2; It is shaped as for example fin-type or flat board; Mean thickness be essence between 1 millimeter (mm) is to 2 centimeters, wherein the geometrical shape of the fin of fin-type radiator element (for example: rectangular parallelepiped), the prism of right cylinder or random shape can be prism.Please with reference to Fig. 2 A, it illustrates the structural representation of the aluminium nitride ceramics radiator element of one embodiment of the invention, and wherein the geometrical shape of the fin 20 of fin-type radiator element 10 is a rectangular parallelepiped.Please with reference to Fig. 2 B, it illustrates the structural representation of the aluminium nitride ceramics radiator element of another embodiment of the present invention, and wherein the geometrical shape of the fin 22 of fin-type radiator element 12 is a right cylinder.
Below with application examples 1 to 4 present embodiment is described.Please with reference to table one, table one is application examples 1 to 4 employed material and a process conditions, in order to carry out above-mentioned step 100 respectively to 160.
Table one
Table two
Please with reference to table two; Table two is the made aluminium nitride ceramics radiator element of application examples 1 to 4 and the test result of comparative example in a blue-ray DVD main frame of silit radiator element; Wherein the bottom of radiator element system contacts with cpu (CPU), so that the torrid zone that CPU was produced is walked.With the contacted temperature of CPU when lower, the heat-sinking capability of representing radiator element better when radiator element bottom; When the radiator element head temperature is lower, represent the radiator element bottom littler to the temperature difference at top, the heat extraction coefficient of radiator element is bigger.Can know that by table two heat-sinking capability of the aluminium nitride ceramics radiator element that application examples 1 to 3 is made is all good than the silit radiator element of convention with heat extraction coefficient.In addition, the thickness of the aluminium nitride ceramics radiator element that application examples 1 to 4 is made is 3.8mm and 2.85mm, much larger than the thickness of the 1mm of the aluminium nitride AlN radiator element of convention.The shrinking percentage of the aluminium nitride ceramics radiator element that application examples 1 to 3 is made is respectively 5.12%, 5.15% and 5.13%, far below the shrinking percentage more than 10% of the aluminium nitride AlN radiator element of convention.The proportion of the aluminium nitride ceramics radiator element that application examples 1 to 4 is made is respectively 1.64,1.69,1.71 and 1.72, far below 3.26 proportion of the aluminium nitride AlN radiator element of convention.
Embodiment 2: use aluminum nitride powder mixture, sintering aid, softening agent and cakingagent.
Please with reference to Fig. 3, it illustrates the schematic flow sheet according to the aluminium nitride ceramics manufacturing method of heat sink of another embodiment of the present invention.At present embodiment; At first will have first aluminum nitride powder of first median size, the 3rd aluminum nitride powder that has second aluminum nitride powder of second median size and have the 3rd median size is mixed into aluminum nitride powder mixture (step 200); Wherein first median size be essence between 30 microns to 80 microns, the weight ratio of first aluminum nitride powder in the aluminum nitride powder mixture is that essence is between 50% to 75%; Second median size be essence between 10 microns to 29 microns, the weight ratio of second aluminum nitride powder in the aluminum nitride powder mixture is that essence is between 10% to 30%; The 3rd median size be essence between 3 microns to 9 microns, the weight ratio of the 3rd aluminum nitride powder in this aluminum nitride powder mixture is that essence is between 10% to 20%.Then, add in sintering aid to the aluminum nitride powder mixture and obtain first mixture (step 210), wherein the weight ratio of sintering aid in first mixture is that essence is between 3% to 9%.Then, first mixture, softening agent and cakingagent are mixed stirring and obtain second mixture (step 220), wherein the weight ratio of first mixture in second mixture is that essence is between 73% to 90%; The weight ratio of softening agent in second mixture is that essence is between 3% to 12%; The weight ratio of cakingagent in second mixture is that essence is between 5% to 15%.Softening agent for example can be: silicone oil, adipic acid ester, ester of phthalic acid, paraffin or white cured oil, cakingagent for example can be: lignocellulose, vinyl cellulose, polyvinyl butyral acetal, Vilaterm, Vestolen PP 7052, acryl or resin.
Then, make the screen cloth of the preset mesh number of apparatus second mixture (step 230) that sieves, and obtain the particulate mixture through screen cloth, wherein preset mesh number system essence is between 20 order to 100 orders.Then; With the particulate mixture pressing mold, penetrate or be extrusion-molded into a radiator element and give birth to embryo (step 240); Continue the sintering radiator element in a sintering temperature again and give birth to embryo through a Preset Time (step 250); And obtain a radiator element, wherein Preset Time be essence between 1.5 hours to 3 hours, sintering temperature is that essence is between 1750 ℃ to 1950 ℃.Before carry out step 250, the heating curve of sintering oven for example can be: the speed with 2～4 ℃ of PM intensifications rises to 1200 ℃ by normal temperature earlier; Speed with 1～3 ℃ of PM intensification rises to 1850 ℃ by 1200 ℃ again.Then, carry out step 250, to keep 1850 ℃ temperature through 1.5 hours～3 hours.Then, radiator element is lowered the temperature naturally or continue to be cooled to normal temperature (step 260).According to the proportion of the prepared radiator element of present embodiment be essence between 1.4 to 2.2, it is shaped as for example fin-type (shown in Fig. 2 A and Fig. 2 B) or flat board, mean thickness is that essence is between 1 millimeter (mm) is to 2 centimeters.The proportion of the aluminium nitride ceramics radiator element that application examples 5,6 is made is respectively 1.64 and 1.67, far below 3.26 proportion of the aluminium nitride AlN radiator element of convention.
Below with application examples 5 to 7 present embodiment is described.Please with reference to table three, table three is application examples 5 to 7 employed material and process conditions, in order to carry out above-mentioned step 200 respectively to 260.
Table three
Table four
Please with reference to table four, table four is the made aluminium nitride ceramics radiator element of application examples 5,6 and the test result of comparative example in a blue-ray DVD main frame of silit radiator element.Can know that by table four heat-sinking capability of the aluminium nitride ceramics radiator element that application examples 5 is made is all good than the silit radiator element of convention with heat extraction coefficient.In addition, the thickness of the aluminium nitride ceramics radiator element that application examples 5,6 is made is 3.8mm, much larger than the thickness of the 1mm of the aluminium nitride AlN radiator element of convention.The shrinking percentage of the aluminium nitride ceramics radiator element that application examples 5,6 is made is respectively 5.15% and 5.13%, far below the shrinking percentage more than 10% of the aluminium nitride AlN radiator element of convention.The proportion of the aluminium nitride ceramics radiator element that application examples 5,6 is made is respectively 1.64 and 1.67, far below 3.26 proportion of the aluminium nitride AlN radiator element of convention.
Can know that by above-mentioned embodiment advantage of the present invention is exactly the aluminium nitride ceramics radiator element that high thickness and low-shrinkage can be provided, and have good yield.
Though the present invention discloses as above with embodiment; Right its is not in order to limit the present invention; Any those having an ordinary knowledge in this technical field; Do not breaking away from the spirit and scope of the present invention, when can doing various changes and retouching, so protection scope of the present invention is as the criterion when looking accompanying the claim person of defining.
Claims (12)
1. the method for manufacture of an aluminium nitride ceramics radiator element comprises:
Preparation includes an aluminium nitride AlN mixture of a sintering aid, and wherein the weight ratio of this sintering aid in this aluminium nitride AlN mixture is that essence is between 2% to 9%;
Filter this aluminium nitride AlN mixture; To sift out one first aluminium nitride AlN mixture with one first median size, one the 3rd aluminium nitride AlN mixture that has one second aluminium nitride AlN mixture of one second median size and have one the 3rd median size respectively; Wherein this first median size be essence between 30 microns to 80 microns, the weight ratio of this first aluminium nitride AlN mixture in this aluminium nitride AlN mixture is that essence is between 50% to 75%; This second median size be essence between 10 microns to 29 microns, the weight ratio of this second aluminium nitride AlN mixture in this aluminium nitride AlN mixture is that essence is between 10% to 30%; The 3rd median size be essence between 3 microns to 9 microns, the weight ratio of the 3rd aluminium nitride AlN mixture in this aluminium nitride AlN mixture is that essence is between 10% to 20%;
This first aluminium nitride AlN mixture, this second aluminium nitride AlN mixture, the 3rd aluminium nitride AlN mixture, a softening agent and a cakingagent are mixed stirring and obtain a mixture, and wherein the weight ratio of summation in this mixture of this first aluminium nitride AlN mixture, this second aluminium nitride AlN mixture and the 3rd aluminium nitride AlN mixture is that essence is between 73% to 90%; The weight ratio of this softening agent in this mixture is that essence is between 3% to 12%; The weight ratio of this cakingagent in this mixture is that essence is between 5% to 15%;
Make a screen cloth of the preset mesh number (Mesh) of apparatus one this mixture that sieves, and obtain a particulate mixture through this screen cloth, wherein should preset mesh number system essence between 20 order to 120 orders;
With this particulate mixture pressing mold, penetrate or be extrusion-molded into a radiator element and give birth to embryo; And
Continue this radiator element of sintering in a sintering temperature and give birth to embryo, and obtain a radiator element through a Preset Time.
2. the method for manufacture of aluminium nitride ceramics radiator element as claimed in claim 1, wherein this Preset Time be essence between 1.5 hours to 3 hours, this sintering temperature is that essence is between 1750 ℃ to 1950 ℃.
3. the method for manufacture of aluminium nitride ceramics radiator element as claimed in claim 1 more comprises:
This radiator element is lowered the temperature naturally or continued to be cooled to normal temperature.
4. the method for manufacture of aluminium nitride ceramics radiator element as claimed in claim 1; Wherein this sintering aid be yttrium oxide, quicklime, Natural manganese dioxide, Lithium Oxide 98min, aluminum oxide, titanium oxide, Neodymium trioxide, Samarium trioxide, dysprosium oxide, lime carbonate, magnesiumcarbonate, Quilonum Retard or Calcium Fluoride (Fluorspan) with and composition thereof the group that formed; This softening agent is silicone oil, adipic acid ester, ester of phthalic acid, paraffin or white cured oil, and this cakingagent is lignocellulose, vinyl cellulose, polyvinyl butyral acetal (Polyvinyl Butyral), Vilaterm, Vestolen PP 7052, acryl or resin.
5. the method for manufacture of an aluminium nitride ceramics radiator element comprises:
To have one first aluminum nitride powder of one first median size, one the 3rd aluminum nitride powder that has one second aluminum nitride powder of one second median size and have one the 3rd median size is mixed into an aluminum nitride powder mixture; Wherein this first median size be essence between 30 microns to 80 microns, the weight ratio of this first aluminum nitride powder in this aluminum nitride powder mixture is that essence is between 50% to 75%; This second median size be essence between 10 microns to 29 microns, the weight ratio of this second aluminum nitride powder in this aluminum nitride powder mixture is that essence is between 10% to 30%; The 3rd median size be essence between 3 microns to 9 microns, the weight ratio of the 3rd aluminum nitride powder in this aluminum nitride powder mixture is that essence is between 10% to 20%;
Add a sintering aid to this aluminum nitride powder mixture and obtain one first mixture, wherein the weight ratio of this sintering aid in this first mixture is that essence is between 3% to 9%;
This first mixture, a softening agent and a cakingagent are mixed stirring and obtain one second mixture, and wherein the weight ratio of this first mixture in this second mixture is that essence is between 73% to 90%; The weight ratio of this softening agent in this second mixture is that essence is between 3% to 12%; The weight ratio of this cakingagent in this second mixture is that essence is between 5% to 15%;
Make a screen cloth of the preset mesh number of apparatus one this second mixture that sieves, and obtain a particulate mixture through this screen cloth, wherein should preset mesh number system essence between 20 order to 100 orders;
With this particulate mixture pressing mold, penetrate or be extrusion-molded into a radiator element and give birth to embryo; And
Continue this radiator element of sintering in a sintering temperature and give birth to embryo, and obtain a radiator element through a Preset Time.
6. the method for manufacture of radiator element as claimed in claim 5 comprises:
This radiator element is lowered the temperature naturally or continued to be cooled to normal temperature.
7. the method for manufacture of radiator element as claimed in claim 5, wherein this Preset Time be essence between 1.5 hours to 3 hours, this sintering temperature is that essence is between 1750 ℃ to 1950 ℃.
8. the method for manufacture of radiator element as claimed in claim 5; Wherein this sintering aid be yttrium oxide, quicklime, Natural manganese dioxide, Lithium Oxide 98min, aluminum oxide, titanium oxide, Neodymium trioxide, Samarium trioxide, dysprosium oxide, lime carbonate, magnesiumcarbonate, Quilonum Retard or Calcium Fluoride (Fluorspan) with and composition thereof the group that formed; This softening agent is silicone oil, adipic acid ester or ester of phthalic acid, and this cakingagent is lignocellulose, vinyl cellulose, polyvinyl butyral acetal, Vilaterm, Vestolen PP 7052, acryl or resin.
9. radiator element that makes like the method for manufacture of the radiator element of claim 1 or 5, wherein the proportion of this radiator element is that essence is between 1.4 to 2.2.
10. radiator element as claimed in claim 9, wherein this radiator element is shaped as fin-type or flat board.
11. radiator element as claimed in claim 9, wherein this radiator element be shaped as fin-type, the geometrical shape of its fin is prism or right cylinder.
12. radiator element as claimed in claim 9, wherein the mean thickness of this radiator element is that essence is between 1 millimeter (mm) is to 2 centimeters.
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| CN104073695A (en) * | 2014-07-08 | 2014-10-01 | 安徽艳阳电气集团有限公司 | Aluminum-based composite radiating material for LED (light-emitting diode) doped neodymium oxide |
| CN104141068A (en) * | 2014-07-07 | 2014-11-12 | 马鞍山市万鑫铸造有限公司 | Antistatic insulating aluminum-based composite heat sink material applied to LED |
| CN104230344A (en) * | 2014-08-27 | 2014-12-24 | 合肥工业大学 | Low-temperature sintering preparation method of AlN ceramic added with multi-element sintering aid |
| CN105776869A (en) * | 2014-12-17 | 2016-07-20 | 黄更生 | Glass ceramics for exciting white-light LED (Light Emitting Diode) lamps |
| CN107935601A (en) * | 2017-12-23 | 2018-04-20 | 洛阳名力科技开发有限公司 | A kind of aluminium nitride ceramics |
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| US7011804B2 (en) * | 2003-07-02 | 2006-03-14 | Taiwan Salt Company | Method and apparatus for preparing aluminum nitride |
| CN1796272A (en) * | 2004-12-22 | 2006-07-05 | 台盐实业股份有限公司 | Method for synthesizing aluminium nitride |
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| CN105776869A (en) * | 2014-12-17 | 2016-07-20 | 黄更生 | Glass ceramics for exciting white-light LED (Light Emitting Diode) lamps |
| CN107935601A (en) * | 2017-12-23 | 2018-04-20 | 洛阳名力科技开发有限公司 | A kind of aluminium nitride ceramics |
| CN110759730A (en) * | 2018-07-25 | 2020-02-07 | 比亚迪股份有限公司 | Preparation method of composite ceramic and composite ceramic |
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