CN105509522A - Manufacturing method of sintered copper powder and high-porosity copper foam composited heat pipe - Google Patents
Manufacturing method of sintered copper powder and high-porosity copper foam composited heat pipe Download PDFInfo
- Publication number
- CN105509522A CN105509522A CN201410502621.XA CN201410502621A CN105509522A CN 105509522 A CN105509522 A CN 105509522A CN 201410502621 A CN201410502621 A CN 201410502621A CN 105509522 A CN105509522 A CN 105509522A
- Authority
- CN
- China
- Prior art keywords
- copper
- sintered
- foam
- sintering
- heat pipe
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Pending
Links
Landscapes
- Powder Metallurgy (AREA)
Abstract
The invention discloses a manufacturing method of a heat pipe adopting a sintered copper powder and copper foam composited structure. A wickof the heat pipe manufactured through the method adopts a composited structure, an evaporation section is formed by sintering copper powder, and a condensation section and a heat insulation section are formed by curling and then sintering high-porosity copper foam adopting a hierarchical structure. The porosity of sintered copper of the evaporation section is about 40%-50%, and the porosity of the copper foam of the condensation section and the heat insulation section reaches 60%-95%. With the adoption of the structural design, according to specific application requirements of the heat pipe, the low porosity and the small-pore-diameter structure of the evaporation section facilitate rapid evaporation of a liquid-phase medium, liquid-phase backflow heat resistance is greatly reduced due to high-porosity structures of the condensation section and the heat insulation section, a liquid flows back to the evaporation section rapidly, and the phase-change cycling speed is increased. With the adoption of the heat pipe adopting the sintered copper powder and copper foam composited structure, the heat dissipation efficiency of the heat pipe is improved, the heat resistance is reduced, and the rapid and efficient heat dissipation effect is realized. Equipment and the technology of the manufacturing method are similar to those of a conventional heat pipe manufacturing method, and the manufacturing method is suitable for industrial large-scale production.
Description
Technical field
What the present invention relates to is a kind of copper powder sintering and the manufacture method of high celled foam copper composite heat pipe.That it changes the unicity of wick designs in heat pipe, and according to the different piece role of heat pipe or the difference of function, form the sintered copper and foam copper composite construction that are made up of different porosities, the heat pipe that this manufacture method obtains has and to accelerate at evaporation ends that liquid-vapour changes, the backflow of liquid phase after thermal insulation end and condensation end accelerate condensation, reduce the thermal resistance of liquid-phase reflux, improve dielectric fluid-vapour phase circulation rate, realize the effect of quick conductive and heat radiation.
Background technology
Since heat pipe invention in 1963, progressively civil area is developed into from early stage aerospace applications, because heat pipe takes full advantage of the Rapid Thermal hereditary property of heat-conduction principle and refrigeration filling, its capacity of heat transmission exceedes the several times of the capacity of heat transmission of any known metal to hundreds of times, for the semiconductor of high speed development, electronic device high power, the integrated guarantee providing quick conductive and heat radiation, guarantee stability and the reliability of its work.Heat pipe is a kind of Novel heat transfer element with high heat conductivility, and the heat transfer area with thermal conductivity, good isothermal, cold and hot both sides fast can change arbitrarily, can the feature such as remotely transferring, temperature control.By the tube core close contact of the substrate of heat-pipe radiator and the device for high-power power electronic such as IGCT, IGBT, IGCT, can directly the heat of tube core be derived fast.General heat pipe is sealed to form by shell and liquid-sucking core.Inside heat pipe is pumped into negative pressure state, is filled with suitable liquid medium, and under negative pressure, boiling point reduces this liquid medium greatly, is very easy to liquid gas phase transition occurs, thus conduct a large amount of latent heat produced when it is transformed by phase transformation.
Inside pipe wall has liquid-sucking core, is usually made up of porous material or loose structure, because porous material has good capillary attraction, loose structure also easily produces corresponding capillarity.Liquid-sucking core is an important component part of heat pipe.The version of liquid-sucking core will directly have influence on the performance of heat pipe and heat exchange of heat pipe.When heat pipe one end is heated as evaporator section, evaporator section connects with thermal source usually, and when it is heated, the rapid forming core of the liquid in capillary also gasifies, steam flows to the condensation segment that other one end is heat radiation under small pressure differential, because of variations in temperature, there is liquid-gas phase transition, releases heat, and again condense into liquid, liquid relies on the effect of capillary force to flow back to evaporator section along the porous material being attached to inside pipe wall again, is formed by liquid to vapour, then the Rapid Circulation from vapour to liquid.The heat effect of this circulation heating end, carries out fast, heat is reached fast the condensation segment of other one end by the evaporator section of heat pipe, if the heat of condensation segment is if leave fast, just can accelerate the carrying out of this circulation.Achieve the heat of evaporator section to conduct continuously like this and come, guarantee that the temperature of this thermal source of evaporator section be heated is in suitable working range.So determine that one of key factor of heat pipe heat radiation efficiency is the structure of liquid-sucking core.In recent years along with the development of hot pipe technique, various countries researcher does a lot of work in liquid sucting core structure and theoretical research, draw the heat pipe with excellent heat performance, its liquid-sucking core should possess following features: the capillary attraction that (1) is enough large, or less tube core effective aperture, be convenient to the nucleation and growth of gas phase when liquid vapour changes; (2) less liquid flowing resistance, namely has higher permeability, is convenient to liquid phase quick backflow and Rapid Circulation formation; (3) good heat-transfer character, namely has little radial thermal resistance; (4) good process repeatability and reliability, manufacturing process is simple, low price.
But from the micro heat pipe technique of usual IT application, roughly experienced by following several stage, the heat pipe of braiding copper mesh structure is transitioned into, from the porous sintered copper liquid-sucking core micro heat pipe directly adopting the Micron-Sized Copper Powders Coated high temperature sintering of atomization to be formed that the heat pipe of braiding copper mesh structure is the most frequently used up till now from the heat pipe of early stage groove structure.But because the porosity of sintered copper powder is roughly at 40-50%, little in the relatively low aperture of heating evaporation section porosity, capillary attraction is obvious, be conducive to the evaporation of liquid phase medium, if but adopted sintered copper liquid-sucking core in the phase transformation cyclic process of condensation segment beyond heating evaporation section and adiabatic section, liquid-phase reflux thermal resistance will be caused relatively large.Does this affect the key issue of radiating effect greatly how to solve liquid-sucking core backflow thermal resistance? propose of the present invention a kind ofly to be sintered and the manufacturing method of thermotube of high celled foam copper compound structure by copper powder.
Summary of the invention
Object of the present invention proposes for the capillary structure of the liquid-sucking core of the condensation segment how improved beyond heating evaporation section and adiabatic section, because sintered copper porosity is low, usually within the scope of 40-50%, so thermal resistance is relatively large during backflow, and speed is slow, affects the circulation rate of liquid phase medium phase transformation.The foam copper of high porosity is adopted to address this problem if improve porosity further? found by large quantifier elimination, the hierarchy construction foam copper that Jiangsu Ge Ye new material Science and Technology Ltd. produces, its aperture is controlled within the scope of 300 nanometers to 1 millimeter, porosity can chosen up within the scope of 60-95% as requested, the foam copper of this hierarchy construction has excellent capillary attraction, and be combined well with sintered copper part, after extraordinary solution condensation segment liquid-gas phase transition, the difficult problem that liquid phase quick backflow thermal resistance is large.
Liquid-sucking core in heat pipe will be made up of sintered copper and foam copper composite construction.Namely adopt sintered copper structure in the heating evaporation section of heat pipe, adopt the method similar to conventional sintered copper heat pipe, by the part of the Micron-Sized Copper Powders Coated of atomization sintering at the inwall evaporator section of copper pipe; And other parts of heat pipe and adiabatic section and condensation segment, the foam copper of the high porosity of the hierarchy construction of Jiangsu Ge Ye new material Science and Technology Ltd. production will be adopted, this foam copper adopts the thermo-mechanical treatment process identical with evaporator section, under high temperature reducing atmospheres, by foam copper sintering at the remainder of copper pipe inwall, define the composite construction of liquid-sucking core part by the sintered copper of low porosity and the hierarchy construction foam copper of high porosity.So just achieve heat pipe, in heating evaporation section, there is relative low porosity and little aperture, form obvious capillary attraction, be conducive to the rapid evaporation of liquid phase medium, when steam is transferred to condensation segment by vapor chamber, thermal release, after there is vapour-liquid transformation, liquid phase medium by by high porosity and the foam copper quick backflow with the hierarchy construction of fine capillary attraction to evaporator section, accelerate the back-flow velocity of steam after condensation segment changes liquid phase into, greatly reduce the thermal resistance of condensation segment and the backflow of adiabatic section liquid medium, accelerate the circulation rate of liquid medium phase transformation in heat pipe, improve radiating efficiency, quick conductive and heat dissipation problem needed for effective solution golf calorific value electronic component.
Accompanying drawing explanation
Fig. 1 is hierarchy construction foam copper micro-structural stereoscan photograph.
The schematic diagram of Fig. 2 multiple structural features of copper powder and foam copper in copper pipe.Note needing foam copper and intermediolateral column to insert in the lump, the position that wherein foam copper is suitable in copper pipe lower end, and then inject copper powder.
The sectional view of the sintered copper that Fig. 3 makes and foam copper composite construction liquid-sucking core heat pipe.
Fig. 4 sintered copper and foam copper composite construction liquid-sucking core heat pipe outline drawing.Similar to the sintered copper heat pipe of routine, but evaporation ends and condensation end need be marked, can not get wrong when guaranteeing subsequent thermal dissipation module group assembling.
instantiation
Be below liquid-sucking core be sintered copper and foam copper composite construction, design thickness is 0.5 millimeter, and adopt diameter to be the pure copper tube of 6mm and 8mm, overall length is 260mm, and wherein heating segment length is the micro heat pipe of 50mm.
(1) according to the diameter of selected pure copper tube be 6 or 8 millimeters, wall thickness is the copper pipe of 0.3 millimeter, length need consider the requirements such as follow-up welding, and rule of thumb proper extension is to 266mm, and cleaning-drying;
(2) according to heating evaporation segment length 50mm, calculate the thickness of required copper powder, wherein the porosity of sintered copper calculates the amount of required copper powder according to 48%, remainder is foam copper, foam copper overall length is 210mm, and calculate the shearing width of foam copper according to internal diameter, the porosity of the hierarchy construction foam copper selected is at 75-76%, in addition necking down process will be carried out, so reserve 6mm from termination in this one end main in subsequent handling.According to calculating, the intermediolateral column diameter selected is respectively stainless steel or the aluminium oxide ceramics of 4.4mm or 6.4mm, and carries out the curling of foam copper and insert the corresponding position of copper pipe;
(3) granularity selected by copper powder is 150-200 object atomized spherical pure copper powder, and according to calculating, the quality of the copper powder needed for weighing, adds the upper end of foam copper by copper powder, and vibration ramming.
(4) push reduction furnace and carry out high temperature reduction sintering, first nitrogen prepurging is adopted under low temperature, hydrogen nitrogen mixed gas atmosphere is passed into when temperature reaches more than 500 DEG C, carry out the thermo-mechanical processi of high temperature reduction sintering, hydrogen nitrogen mixing ratio is 75 ~ 10%(hydrogen): (25-90%(nitrogen), firing rate is 15-20
oc/ divides, to 950
oc is incubated 1 hour;
(5) then conveniently heat pipe welding packaged type carries out following process, wherein argon arc welding is carried out in sintered copper one end, other end foam copper end will carry out necking down, vacuumize, water filling and welded encapsulation process, and obtained liquid-sucking core is the micro heat pipe of sintered copper (porosity roughly 48%) and foam copper (porosity is 74-75% roughly) composite construction:
Obtained above-mentioned two kinds of different-diameters are the composite construction round shape heat pipe of liquid-sucking core by sintered copper and foam copper, and the sintered copper carrying out sintering with direct copper powder is that compared with the heat pipe of liquid-sucking core, heat radiation power Qmax significantly improves after tested, and thermal resistance greatly reduces.Show the micro heat pipe of liquid-sucking core by sintered copper and foam copper composite construction, there is high efficiency and heat radiation effect.
Detailed description of the invention
The diameter of normal miniature heat pipe is 4,5,6,8,10,16mm, requirement is applied according to heat pipe (round shape or flat), select the thickness of liquid-sucking core and the total length of evaporator section and heat pipe, the thickness that the thickness of usual foam copper requires according to sintered copper is determined, both thickness is identical, is convenient to manufacture; After determining the length of evaporator section, remaining length is exactly the length of foam copper addition, and the surplus left when simultaneously suitably noting welding, the micro-structural stereoscan photograph of hierarchy construction foam copper material as shown in Figure 1.According to the thickness requirement of the diameter of copper pipe, wall thickness and liquid-sucking core, determine diameter and the length of intermediolateral column, intermediolateral column can select stainless steel or aluminium oxide ceramics rod.By the foam copper of desired thickness according to calculating, shear and be curled into cylindric, reduce the gap of lap-joint when being curled into cylindric as far as possible, foam copper and intermediolateral column are inserted in the lump and cleans in the rear copper pipe of also drying to the position determined, then the shake table adding copper powder is placed in, add appropriate copper powder and vibration ramming, as shown in Figure 2.
After vibration ramming, carry out high temperature reduction sintering processes.One group of sample is arranged in corresponding template, carries out high temperature reduction sintering processes, the abundant prepurging of stove nitrogen, ensure follow-up safety when passing into hydrogen-nitrogen mixture gas.Reducing atmosphere hydrogen nitrogen mixed gas, in gaseous mixture, the content of hydrogen can between 10%-100%.Usually, when temperature is more than 500 DEG C, hydrogen nitrogen mixed gas or pure hydrogen is passed into.Reduction temperature is 850
obetween C-1050 DEG C, the recovery time to 2 hours, cooled to room temperature after reduction at 30 minutes, practical operation be less than or equal to 80 DEG C can close reducing atmosphere take out sintering after sample.The thickness can preparing required hybrid structure liquid-sucking core can be selected from 0.1 millimeter to 2 millimeters, but will guarantee the uniformity of sintered copper, and general sintered copper thickness is more than 0.3 millimeter.If when wick thickness is partially thick, then reduce sintering temperature and time optional said temperature and time range is higher and partially long.
After sintering processes, be first take out intermediolateral column, enter next step welding, note because liquid-sucking core is composite construction in heat pipe, so in operation it should be noted that wherein this one end of upper end sintered copper, carry out argon arc friction welding.Foam copper one end, lower end is follow-up after drawing necking down, carries out vacuum pumping liquid injection, then encapsulates seam.The number of reservoir quantity is the amount calculating required liquid medium according to the amount of sintered copper and the total porosity of foam copper, and actual reservoir quantity is directly accurately controlled according to reservoir quantity by sensor, usually slightly minor departures.This completes the manufacture of the heat pipe that sintered copper and foam copper compound sinter through high temperature reduction, its sectional view as shown in Figure 3, then carries out the test of round shape properties of hot pipe.Attention will be convenient to differentiate sintered copper end and foam copper end, because sintered copper end is connect thermal source in the future.
Follow-up as bent and deformation, by similar with the Bending Deformation of normal sintering copper heat pipe according to operations such as designing requirements.As shown in Figure 4, sintered copper is the same with sintered copper heat pipe with foam copper composite construction micro heat pipe profile.
Adopt of the present invention a kind of by the heat pipe that copper powder sinters and high celled foam copper compound structure is made, the thermal performance test through batch finds, heat radiation power obtains larger raising, and thermal resistance obviously declines, and meets the high power needed for electronic equipment and quick heat radiating requirement.Manufacture method of the present invention is simple, easy to operate, and equipment is suitable with conventional heat pipe manufacture method, and production process is pollution-free, good product quality, is applicable to suitability for industrialized production.
Claims (8)
1. sintered and the manufacturing method of thermotube of high celled foam copper compound by copper powder, the liquid-sucking core of this heat pipe is composite construction, and wherein evaporator section will be formed by copper powder sintering, and condensation segment and adiabatic section are formed by the curling rear sintering of the hierarchy construction foam copper of high porosity.
2. a kind ofly as claimed in claim 1 to be sintered and the manufacturing method of thermotube of foam copper compound by copper powder, it is characterized in that the step of concrete preparation process comprises: (1) copper pipe cleaning-drying; (2) foam copper will join the correct position of copper pipe with intermediolateral column; (3) copper powder injects; (4) high temperature sintering under reducing atmosphere; (5) one end welding, one end necking down process; (6) vacuumize, water filling and encapsulation; (7) round shape heat pipe reliability and heat property test; (8) bending and deformation is shaping; (9) thermal performance test after deformation.
3. a kind ofly as claimed in claim 1 to be sintered and the manufacturing method of thermotube of foam copper compound by copper powder, high porosity foam copper by hierarchy construction sinters on copper pipe inwall as liquid-sucking core by the part except evaporator section and condensation segment and adiabatic section, it is characterized in that the porosity of the foam copper of hierarchy construction can be chosen as requested between 60-95%, be much higher than directly by the 40-50% porosity of atomized copper powder sintering.
4. a kind ofly as claimed in claim 1 sintered and the manufacturing method of thermotube of foam copper compound by copper powder, evaporator section is formed by atomized copper powder sintering, and its porosity is between 40-50%.
5. a kind ofly as claimed in claim 1 sintered and the manufacturing method of thermotube of foam copper compound by copper powder, the thickness selection of its sintered copper powder is identical with the thickness of foam copper, can choose according to designing requirement at 0.3 millimeter between 2 millimeters.
6. a kind ofly as claimed in claim 2 to be sintered by copper powder and the concrete technology of manufacturing method of thermotube of foam copper compound, it is characterized in that foam copper and sintered copper complete (1) according to designing requirement in two steps as the preparation before liquid-sucking core sintering, after foam copper is die-cut, curling and stainless steel or aluminium oxide ceramics intermediolateral column insert correct position in copper pipe in the lump; (2) be placed in vibration charging platform, inject the copper powder of required weight and vibration ramming.
7. a kind ofly as claimed in claim 2 to be sintered by copper powder and the concrete reduction sintering process process of manufacturing method of thermotube of foam copper compound, its reduction sintering atmosphere adopts hydrogen-nitrogen mixture gas, the percent by volume of hydrogen is 10-100%, the ratio of hydrogen is decreased through nitrogen to adjust, the atmosphere that the reduction sintering that all can meet heat pipe in above-mentioned scope requires.
8. to be sintered by copper powder and the concrete reduction sintering process process of manufacturing method of thermotube of foam copper compound by a kind of as claimed in claim 2, it is characterized in that the reduction sintering temperature of copper powder and foam copper can be selected in 850 DEG C to 1050 DEG C, reduction sintering time can be selected in 30 minutes to 2 hours, reduction sintering effect is all met in this temperature and time scope, the thickness required by sintered copper is depended in the concrete selection of said temperature and time, if thickness requirement is thin, high temperature reduction temperature suitably can select 850-900 DEG C, and reduction sintering time is as short as 30 minutes to 1 hour relatively; If thickness is thicker, then sintering temperature of reducing is selected relatively with sintering time to extend to 1-2 hour at 900-1030 DEG C.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502621.XA CN105509522A (en) | 2014-09-26 | 2014-09-26 | Manufacturing method of sintered copper powder and high-porosity copper foam composited heat pipe |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410502621.XA CN105509522A (en) | 2014-09-26 | 2014-09-26 | Manufacturing method of sintered copper powder and high-porosity copper foam composited heat pipe |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN105509522A true CN105509522A (en) | 2016-04-20 |
Family
ID=55717686
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN201410502621.XA Pending CN105509522A (en) | 2014-09-26 | 2014-09-26 | Manufacturing method of sintered copper powder and high-porosity copper foam composited heat pipe |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN105509522A (en) |
Cited By (3)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798796A (en) * | 2019-01-31 | 2019-05-24 | 江苏集萃先进金属材料研究所有限公司 | Capillary structure with high porosity and its manufacturing method inside one heat-transferring assembly |
| CN110940215A (en) * | 2019-11-14 | 2020-03-31 | 上海卫星装备研究所 | Structure and manufacturing method of variable cross-section heat pipe |
| CN112091208A (en) * | 2020-09-10 | 2020-12-18 | 安徽德诠新材料科技有限公司 | Heat-conducting copper powder with bimodal distribution characteristic and preparation method and application thereof |
Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57490A (en) * | 1980-05-30 | 1982-01-05 | Kanai Hiroyuki | Double structure heat pipe |
| CN1808044A (en) * | 2005-01-22 | 2006-07-26 | 富准精密工业(深圳)有限公司 | Sintering type heat pipe and manufacturing method thereof |
| CN1884955A (en) * | 2005-06-24 | 2006-12-27 | 钰成化工有限公司 | Heat conductive pipe |
| CN101287859A (en) * | 2005-09-07 | 2008-10-15 | 英科有限公司 | Process for producing metal foams having uniform cell structure |
| CN101900505A (en) * | 2010-08-19 | 2010-12-01 | 燿佳科技股份有限公司 | Heat pipe and manufacturing method thereof |
| US20130213611A1 (en) * | 2012-02-22 | 2013-08-22 | Chun-Ming Wu | Heat pipe heat dissipation structure |
| CN104296570A (en) * | 2014-10-17 | 2015-01-21 | 中国石油大学(华东) | Heat pipe |
-
2014
- 2014-09-26 CN CN201410502621.XA patent/CN105509522A/en active Pending
Patent Citations (7)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS57490A (en) * | 1980-05-30 | 1982-01-05 | Kanai Hiroyuki | Double structure heat pipe |
| CN1808044A (en) * | 2005-01-22 | 2006-07-26 | 富准精密工业(深圳)有限公司 | Sintering type heat pipe and manufacturing method thereof |
| CN1884955A (en) * | 2005-06-24 | 2006-12-27 | 钰成化工有限公司 | Heat conductive pipe |
| CN101287859A (en) * | 2005-09-07 | 2008-10-15 | 英科有限公司 | Process for producing metal foams having uniform cell structure |
| CN101900505A (en) * | 2010-08-19 | 2010-12-01 | 燿佳科技股份有限公司 | Heat pipe and manufacturing method thereof |
| US20130213611A1 (en) * | 2012-02-22 | 2013-08-22 | Chun-Ming Wu | Heat pipe heat dissipation structure |
| CN104296570A (en) * | 2014-10-17 | 2015-01-21 | 中国石油大学(华东) | Heat pipe |
Cited By (5)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN109798796A (en) * | 2019-01-31 | 2019-05-24 | 江苏集萃先进金属材料研究所有限公司 | Capillary structure with high porosity and its manufacturing method inside one heat-transferring assembly |
| CN110940215A (en) * | 2019-11-14 | 2020-03-31 | 上海卫星装备研究所 | Structure and manufacturing method of variable cross-section heat pipe |
| CN110940215B (en) * | 2019-11-14 | 2021-05-11 | 上海卫星装备研究所 | Structure and manufacturing method of variable cross-section heat pipe |
| CN112091208A (en) * | 2020-09-10 | 2020-12-18 | 安徽德诠新材料科技有限公司 | Heat-conducting copper powder with bimodal distribution characteristic and preparation method and application thereof |
| CN112091208B (en) * | 2020-09-10 | 2024-04-26 | 安徽德诠新材料科技有限公司 | Heat conduction copper powder with bimodal distribution characteristics and preparation method and application thereof |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| CN104776740A (en) | Method for preparing high-efficiency micro heat tube by combining copper powder with copper oxide powder | |
| CN104759627B (en) | A kind of method that micro heat pipe is manufactured by reduction-oxidation copper powder | |
| Tang et al. | Thermal performance enhancement of an ultra-thin flattened heat pipe with multiple wick structure | |
| Chen et al. | Experimental investigation of loop heat pipe with flat evaporator using biporous wick | |
| Yan et al. | A novel ultra-thin vapor chamber with composite wick for portable electronics cooling | |
| Zhong et al. | Experimental study of a large-area ultra-thin flat heat pipe for solar collectors under different cooling conditions | |
| CN203454874U (en) | Anti-gravity loop heat pipe | |
| US20070240854A1 (en) | Heat pipe and method for producing the same | |
| CN100529636C (en) | Heat pipe and method for manufacturing same | |
| Wang et al. | An integrated heat pipe coupling the vapor chamber and two cylindrical heat pipes with high anti-gravity thermal performance | |
| CN103165547B (en) | Microgroove group composite phase change radiator | |
| CN110345787A (en) | A kind of design method for integrated high temp alkali metal heat pipe | |
| Meng et al. | Experimental study on the heat transfer performance of a vapour chamber with porous wick structures printed via metallic additive manufacturing | |
| CN105509522A (en) | Manufacturing method of sintered copper powder and high-porosity copper foam composited heat pipe | |
| CN203719484U (en) | Soaking plate based on artificial graphite film | |
| Yu et al. | Effect of spiral woven mesh liquid pumping action on the heat transfer performance of ultrathin vapour chamber | |
| He et al. | Heat transfer performance analysis of an ultra-thin aluminum vapor chamber with serrated microgrooves | |
| Yuan et al. | Experimental study of large-area ultra-thin vapor chamber for microelectronic heat dissipation | |
| Li et al. | Research progress and prospect of heat pipe capillary wicks | |
| Xu et al. | Heat transfer performance of novel high temperature flat heat pipe (HTFHP) with heating power and inclination angles | |
| Gu et al. | Enhancing heat transfer performance in 3D-printed integrated vapor chamber using composite structures | |
| Wu et al. | Thermo-hydrodynamic performance of tubular pulsating heat pipes with integral sintered powder wicks | |
| Dai et al. | Research on the thermal performance and stability of three-dimensional array pulsating heat pipe for active/passive coupled thermal management application | |
| Tang et al. | Stress analysis and thermal performance of ultra-thin heat pipes for compact electronics | |
| Sun et al. | Characterization of high-performance nanostructured wick for heat pipes |
Legal Events
| Date | Code | Title | Description |
|---|---|---|---|
| C06 | Publication | ||
| PB01 | Publication | ||
| C10 | Entry into substantive examination | ||
| SE01 | Entry into force of request for substantive examination | ||
| WD01 | Invention patent application deemed withdrawn after publication |
Application publication date: 20160420 |
|
| WD01 | Invention patent application deemed withdrawn after publication |