CN1958191A - Parting composition in use for heat pipe sintering technique, and action method - Google Patents
Parting composition in use for heat pipe sintering technique, and action method Download PDFInfo
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- CN1958191A CN1958191A CN 200510117172 CN200510117172A CN1958191A CN 1958191 A CN1958191 A CN 1958191A CN 200510117172 CN200510117172 CN 200510117172 CN 200510117172 A CN200510117172 A CN 200510117172A CN 1958191 A CN1958191 A CN 1958191A
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Abstract
A parting composition used for sintering heat tube contains boron nitride (1-45%), adhesive (1-45%), and optional liquid carrier. Said parting composition is prepared on the surface of a metallic rod in a copper tube to change the performance of contact interface between metallic rod and copper tube, so it is easy to draw the metallic rod out of the copper tube after they are sintered.
Description
Technical field
The present invention relates to parting composition and using method thereof that a kind of heat pipe sintering technology is used, especially, the present invention relates to parting composition and using method thereof that a kind of heat pipe sintering technology that contains boron nitride is used.
Background technology
Heat pipe, fin and fan be in the information hardware in order to the key part and component of heat radiation, wherein, heat pipe also replaced traditional heat sink applications in as the code name of Intel release be in the heat abstractor of central processing unit of Prescott.The essential structure of heat pipe is combined by closed container, capillary structure and working fluid, according to the differentiation of operating environment, then can be distinguished into evaporator section, adiabatic section and condensation segment.When heat generating component contacted with evaporator section, its heat can pass to container tube wall, capillary structure and working fluid from heat generating component.Afterwards, working fluid absorbs the latent heat of vaporization because of being heated and becomes steam.Make the steam pressure of evaporator section be higher than condensation segment, thereby drive steam, flow to condensation segment from evaporator section via the passage in the heat pipe.Steam can return evaporator section by capillary structure and by capillary force after condensation segment is condensed into liquid, and makes working fluid be able to repetitive cycling to utilize again.
As from the foregoing, the main function of the capillary structure in the heat pipe is in order to produce capillary pressure, to make working fluid be able to be back to from condensation segment each corner of evaporator section, and in view of this, the size of capillary pressure can have influence power utterly for the heat transfer property of heat pipe.Generally speaking, capillaries fabricated can be distinguished into groove, multilayer net, fiber and metal powder sintered four types, wherein, metal powder sintered formula heat pipe is the most large of existing market, the city accounts for rate and is about 55%, the making rough segmentation of metal powder sintered formula heat pipe is four steps, is preparation, capillary structure making, machining and the finished product test of container in regular turn.Wherein, the production method that capillary structure is made can utilize thin rod iron to insert in the copper pipe, and then in the copper powder ingress pipe that will sieve, cooperate external concussion effect that copper powder is loaded closely, put it into again afterwards and carry out sintering in the atmosphere sintering furnace, pull out thin rod iron afterwards and can obtain capillary structure.
Yet behind traditional high temperature sintering, metal bar also can be in the same place with the copper powder sintering, therefore crooked or have the situation of can not taking out to produce in the time of can causing metal bar to extract copper pipe out, in relevant known technology, someone uses the mould release of graphite system, by before sintering the time be that mould release is coated with and is sprayed on the metal bar that makes on the metal bar behind the sintering and extracts out easily with graphite, and the number of times of metal bar recycling is increased to 50 times, yet carry out all needing spraying before the sintering at every turn, make making loaded down with trivial details comparatively speaking, the disappearance that therefore is worth a kind of better mould release of exploitation to be made with improvement conventional heat pipe sintering.
Summary of the invention
For making the metal bar can be by extracting out in the copper pipe of finishing the sintering program, and the service life of prolongation metal bar, to reduce cost, simultaneously, improve the productive rate and the yield of copper pipe sintering, the parting composition that the object of the present invention is to provide a kind of heat pipe sintering technology to use, to change metal bar and copper powder contact interface character, the situation of copper powder and metal bar sintering takes place after the minimizing sintering program, the degree of difficulty that metal bar is extracted out in copper pipe reduces, therefore metal bar will be difficult for deformation takes place and improve access times, and then reduce cost, and copper pipe can not cause productive rate and yield to descend yet because of the difficulty that metal bar is extracted out simultaneously.
For achieving the above object, the parting composition that heat pipe sintering technology provided by the invention is used comprises:
1～45% boron nitride; And 1～45% bond.
Described parting composition, wherein the boron nitride ratio is 1～20%.
Described parting composition, wherein the bond ratio is 1～20%.
Described parting composition, wherein aforementioned bond comprises phosphoric acid salt, silicates, clay, waterglass or its mixture.
Described parting composition, it can further comprise a liquid carrier.
Described parting composition, wherein liquid carrier is a water.
Described parting composition, it can further comprise 0.1～5% dispersant.
Described parting composition, wherein dispersant comprises alkyl sulfate, quarternary ammonium salt, polyoxyethylene alkyl ether, N, N-dialkyl amino olefinic carboxylic acid salt or its mixture.
The method of heat pipe sintering of the present invention, its step comprises:
One parting composition is provided;
Aforementioned parting composition is contacted the formation film with metal bar surface;
The metal bar that aforementioned surfaces is had parting composition places hollow copper pipe;
Getting a copper powder material inserts between aforementioned metal rod and the hollow copper pipe in the crack;
The aforementioned hollow copper pipe that has metal bar and be filled with copper powder is carried out high temperature sintering; And
Remove metal bar, can make the hollow copper pipe of inwall tool capillary structure;
Preceding method is characterised in that: aforementioned parting composition comprises 1～45% boron nitride and 1～45% bond.
Described method, wherein the formation method of film is with the parting composition spraying or brushes in behind the metal bar surface this metal bar being heated to more than 200 ℃.
Described method, wherein the formation method of film is metal bar to be immersed to take out behind the parting composition again be heated to more than 200 ℃.
Described method, wherein metal bar is heated to more than 250 ℃.
Described method, the wherein formation method of the film preheating of can further metal bar being gone ahead of the rest.
Described method, wherein the boron nitride ratio is 1～20%.
Described method, wherein the bond ratio is 1～20%.
Described method, wherein bond comprises phosphoric acid salt, silicates, clay, waterglass or its mixture.
Described method, wherein parting composition further comprises a liquid carrier.
Described method, wherein liquid carrier is a water.
Described method, wherein parting composition can further comprise one 0.1～5% dispersant.
Described method, wherein dispersant comprises alkyl sulfate, quarternary ammonium salt, polyoxyethylene alkyl ether, N, N-dialkyl amino olefinic carboxylic acid salt or its mixture.
Described method, it can further comprise one can further comprise the program of rising again before removing metal bar.
Described method, the temperature of the program of wherein rising again is to rise again to room temperature.
Utilize the mould release of nitrogen boron of the present invention, metal bar behind the high temperature sintering is extracted out easily, and each spraying is reusable to be coated with spray again 8 times and to get final product, the continuous access times of metal bar can use 120～160 times in addition, effectively prolong the service life of metal bar, the purpose that reaches raising productive rate and dose rate and reduce cost.
Description of drawings
Figure 1A is the thin rod iron striograph of the parting composition of uncoated nitrogen boron of the present invention before the sintering.
Figure 1B is the thin rod iron striograph of the parting composition of coating nitrogen boron of the present invention before the sintering.
Fig. 2 A is the striograph after being extracted out by copper pipe behind the thin rod iron sintering of parting composition of uncoated nitrogen boron of the present invention.
Striograph after Fig. 2 B is extracted out by copper pipe after for the thin rod iron sintering of parting composition of coating nitrogen boron of the present invention.
The specific embodiment
The parting composition that heat pipe sintering technology of the present invention is used, it comprises: 1～45% boron nitride and 1～45% bond.And in preferable enforcement aspect, this parting composition comprises 1～20% boron nitride and 1～20% bond.This parting composition further comprises a liquid carrier, and boron nitride and bond are suspended in wherein.Aforementioned parting composition can further comprise 0.1～5% dispersant.
The alleged bond of the present invention comprises, but is not limited to bond aspects well known in the art such as phosphoric acid salt, silicates, clay, waterglass or its mixture.
One preferred embodiment of parting composition of the present invention is the aspect of solution, and meaning is aforementioned boron nitride and bond and liquid carrier collocation, makes boron nitride and bond can evenly be formed at the metal bar surface.Liquid carrier uses cheap water to get final product in general enforcement aspect, yet is not to make water, and the fluid carrier of can be used for such as evenly suspending boron nitride and bond all can.
Can further comprise a dispersant in the parting composition of the present invention, for example: alkyl sulfate, quarternary ammonium salt, polyoxyethylene alkyl ether, N, the well known materials that can be used as dispersant such as N-dialkyl amino olefinic carboxylic acid salt or its mixture.
The method of heat pipe sintering provided by the present invention, its step comprises: a parting composition at first is provided, this parting composition mainly comprises 1～45% boron nitride and 1～45% bond, wherein bond comprises, but is not limited to bond aspects well known in the art such as phosphoric acid salt, silicates, clay, waterglass or its mixture; And this parting composition can further comprise a liquid carrier, and its function series is to make boron nitride and bond can evenly be suspended in wherein and be formed at the metal bar surface.Use cheap water to get final product as this liquid carrier in general enforcement aspect, yet be not to make water, the fluid carrier of can be used for such as being uniformly dispersed boron nitride and bond all can.And in preferable enforcement aspect, parting composition comprises 1～20% boron nitride and 1～20% bond.
Then aforementioned parting composition is contacted with metal bar surface and form film; The formation method of film comprises, but is not limited to, following three kinds: (1) spraying: earlier with the metal bar preheating, mould release is sprayed at the metal bar surface after the preheating again, metal bar is heated to more than 200 ℃ can finishes again; (2) brush: parting composition is directly brushed behind the metal bar surface, this metal bar is heated to more than 200 ℃; (3) take out after metal bar is immersed parting composition, be heated to again more than 200 ℃.Aforementioned heating-up temperature is preferably more than 250 ℃.
After the metal bar that then surface is had a parting composition film places hollow copper pipe, getting a copper powder material inserts between aforementioned metal rod and the hollow copper pipe in the crack, the copper powder material preferably can sieve earlier and make its particle diameter even, and the hollow copper pipe that will have metal bar afterwards and be filled with copper powder carries out high temperature sintering; At last, extract metal bar out in copper pipe the back of waiting to rise again, and can make the hollow copper pipe of inwall tool capillary structure.
Below implementing aspect is to be used for further understanding advantage of the present invention, is not to be used to limit claim of the present invention.
The preparation of embodiment 1. parting compositions
The preparation specific embodiment of parting composition of the present invention is as described below, the water of at first getting 40 liters (40 kilograms) is as liquid carrier, the dispersant quarternary ammonium salt that adds 0.32 kilogram, stirred 30 minutes, getting 3.2 kilograms boron nitride adding then wherein stirred 30 minutes, add the phosphate of using as bond afterwards again and stirred 1 hour for 2 kilograms, can make parting composition of the present invention.
The preparation of embodiment 2. parting compositions
Present embodiment replaces phosphate with clay and uses as bond, its preparation method is with embodiment 1, stirred 30 minutes in the water with 40 kilograms of 0.32 kilogram dispersant quarternary ammonium salt addings, after the boron nitride that adds 3.2 kilograms stirs 30 minutes, the clay that adds 1 kilogram, the same stirring 1 hour also can make another embodiment of parting composition of the present invention.
Embodiment 3. utilizes parting composition of the present invention to carry out the heat pipe sintering
At first get the parting composition of embodiment 1 preparation, get a thin rod iron then, the mode that parting composition is seen through spraying contacts with thin rod iron, then seeing through mode of heating makes thin rod iron surface form a parting composition film, thin rod iron with the preheating of can going ahead of the rest before parting composition contacts, will help the even formation of film.The thin rod iron that then will have the parting composition film places hollow copper pipe, then getting copper powder inserts between thin rod iron and the hollow copper pipe in the crack, the hollow copper pipe that will have thin rod iron afterwards and be filled with copper powder is put into sintering furnace, has 96% nitrogen and 4% hydrogen in the stove, beginning is carried out sintering with 900 ℃ high temperature, time remaining 20～120 minutes; Wait at last to rise again to the room temperature thin rod iron by extracting out in the copper pipe, can make the hollow copper pipe of inwall tool capillary structure.
There is the copper pipe of copper powder after adding suitable liquid tube sealing under the situation of decompression, just can be made into sintered pipes through the inwall sintering behind the heat pipe sintering.
Figure 1A is the thin rod iron striograph of the parting composition of uncoated nitrogen boron of the present invention before the sintering, Figure 1B is the thin rod iron striograph of the parting composition of coating nitrogen boron of the present invention before the sintering, metal bar surface among Figure 1B is because of having parting composition, so cannot see the metallic luster that thin rod iron should have.
Fig. 2 A is the striograph after being extracted out by copper pipe behind the thin rod iron sintering of parting composition of uncoated nitrogen boron of the present invention, and as seen from the figure, thin rod iron surface has many its surperficial copper powders that are sintered in and attaches.The not generation that attaches of copper powder sintering of striograph after Fig. 2 B is extracted out by copper pipe after for the thin rod iron sintering of parting composition of coating nitrogen boron of the present invention, thin as seen from the figure rod iron surface.The parting composition of hence one can see that nitrogen boron of the present invention is fit to be applied to the heat pipe sintering technology really.
Utilize the mould release of nitrogen boron of the present invention, metal bar behind the high temperature sintering is extracted out easily, and each spraying is reusable to be coated with spray again 8 times and to get final product, the continuous access times of metal bar can use 120～160 times in addition, only can repeat 50 times compared to known technology, the mould release of the present invention's exploitation can effectively prolong the service life of metal bar.
Comprehensively above-mentioned, parting composition of the present invention can make metal bar more easily by extracting out in the copper pipe of finishing the sintering program, and prolongs the service life of metal bar, to reduce cost, reaches the productive rate and the yield that improve the copper pipe sintering simultaneously.
Other implements aspect
Disclosed in this manual all features all may combine with other method, each feature disclosed in this specification all may optionally be replaced with identical, equal or similar purpose feature, therefore, except special notable attribute, the disclosed feature of this all specifications only is an example in equal or the similar features.
Though the present invention discloses as above with preferred embodiment, so it is not in order to limiting the present invention, anyly is familiar with this technical staff, without departing from the spirit and scope of the present invention, and when being used for a variety of modifications and variations.
Claims (22)
1. parting composition that the heat pipe sintering technology is used comprises:
1～45% boron nitride; And
1～45% bond.
2. parting composition as claimed in claim 1 is characterized in that, wherein the boron nitride ratio is 1～20%.
3. parting composition as claimed in claim 1 is characterized in that, wherein the bond ratio is 1～20%.
4. parting composition as claimed in claim 1 is characterized in that, wherein aforementioned bond comprises phosphoric acid salt, silicates, clay, waterglass or its mixture.
5. parting composition as claimed in claim 1 is characterized in that, it can further comprise a liquid carrier.
6. parting composition as claimed in claim 5 is characterized in that, wherein liquid carrier is a water.
7. parting composition as claimed in claim 1 is characterized in that, it can further comprise 0.1～5% dispersant.
8. parting composition as claimed in claim 7 is characterized in that wherein dispersant comprises alkyl sulfate, quarternary ammonium salt, polyoxyethylene alkyl ether, N, N-dialkyl amino olefinic carboxylic acid salt or its mixture.
9. the method for a heat pipe sintering, its step comprises:
One parting composition is provided;
Aforementioned parting composition is contacted the formation film with metal bar surface;
The metal bar that aforementioned surfaces is had parting composition places hollow copper pipe;
Getting a copper powder material inserts between aforementioned metal rod and the hollow copper pipe in the crack;
The aforementioned hollow copper pipe that has metal bar and be filled with copper powder is carried out high temperature sintering; And
Remove metal bar, can make the hollow copper pipe of inwall tool capillary structure;
Preceding method is characterised in that: aforementioned parting composition comprises 1～45% boron nitride and 1～45% bond.
10. method as claimed in claim 9 is characterized in that, wherein the formation method of film is with the parting composition spraying or brushes in behind the metal bar surface this metal bar being heated to more than 200 ℃.
11. method as claimed in claim 9 is characterized in that, wherein the formation method of film is metal bar to be immersed to take out behind the parting composition again be heated to more than 200 ℃.
12., it is characterized in that wherein metal bar is heated to more than 250 ℃ as claim 10 or 11 described methods.
13. method as claimed in claim 9 is characterized in that, the wherein formation method of the film preheating of can further metal bar being gone ahead of the rest.
14. method as claimed in claim 9 is characterized in that, wherein the boron nitride ratio is 1～20%.
15. method as claimed in claim 9 is characterized in that, wherein the bond ratio is 1～20%.
16. method as claimed in claim 9 is characterized in that, wherein bond comprises phosphoric acid salt, silicates, clay, waterglass or its mixture.
17. method as claimed in claim 9 is characterized in that, wherein parting composition further comprises a liquid carrier.
18. method as claimed in claim 17 is characterized in that, wherein liquid carrier is a water.
19. method as claimed in claim 9 is characterized in that, wherein parting composition can further comprise one 0.1～5% dispersant.
20. method as claimed in claim 19 is characterized in that wherein dispersant comprises alkyl sulfate, quarternary ammonium salt, polyoxyethylene alkyl ether, N, N-dialkyl amino olefinic carboxylic acid salt or its mixture.
21. method as claimed in claim 9 is characterized in that, it can further comprise one can further comprise the program of rising again before removing metal bar.
22. method as claimed in claim 21 is characterized in that, the temperature of the program of wherein rising again is to rise again to room temperature.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510117172 CN1958191A (en) | 2005-11-01 | 2005-11-01 | Parting composition in use for heat pipe sintering technique, and action method |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN 200510117172 CN1958191A (en) | 2005-11-01 | 2005-11-01 | Parting composition in use for heat pipe sintering technique, and action method |
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| Publication Number | Publication Date |
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| CN1958191A true CN1958191A (en) | 2007-05-09 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN 200510117172 Pending CN1958191A (en) | 2005-11-01 | 2005-11-01 | Parting composition in use for heat pipe sintering technique, and action method |
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Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868384A (en) * | 2012-12-14 | 2014-06-18 | 富瑞精密组件（昆山）有限公司 | Flat heat pipe and manufacturing method thereof |
| CN109127340A (en) * | 2018-08-22 | 2019-01-04 | 彭保山 | A kind of W powder, preparation method and its application in production heat pipe |
-
2005
- 2005-11-01 CN CN 200510117172 patent/CN1958191A/en active Pending
Cited By (2)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN103868384A (en) * | 2012-12-14 | 2014-06-18 | 富瑞精密组件（昆山）有限公司 | Flat heat pipe and manufacturing method thereof |
| CN109127340A (en) * | 2018-08-22 | 2019-01-04 | 彭保山 | A kind of W powder, preparation method and its application in production heat pipe |
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Open date: 20070509 |