A kind of preparation method of hybrid porous metal material

A technology of porous metal and porous matrix, applied in electrolysis process, electroforming and other directions, can solve the problems of large flow resistance of phase change medium, low porosity of capillary structure, small filling amount of phase change medium, etc. Low cost and long life effect

Inactive Publication Date: 2016-06-01
CENT SOUTH UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Among them, the cost of the groove structure is low, but it is particularly sensitive to the direction of the radiator when it is working. Generally, the groove can only be parallel to the direction of the gravity field, and the heat source is below; the single-layer wire mesh structure is often difficult to meet the requirements. The combined use of multi-layer wire mesh structures with different apertures brings great inconvenience to manufacturing, and the process is very complicated, and the effect and cost are moderate; the effect of sintering copper powder is the best, but the process is complicated, the yield is low, and the cost is high, so the heat dissipation The price of the device is relatively expensive, and at the same time, due to the relatively low porosity of the capillary structure of powder sintering, the resistance of the phase change medium to flow in it is large, the filling amount of the phase change medium per unit volume is small, and the heat transfer capacity is limited

Method used

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  • A kind of preparation method of hybrid porous metal material
  • A kind of preparation method of hybrid porous metal material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] The preparation method of the hybrid porous metal material of this embodiment includes the following steps:

[0019] (1) A polyurethane foam with a thickness of 2mm and a porosity of 110PPI is used as the precursor, and an alkaline electroless plating system is used for electroless copper plating for conductive treatment to obtain a conductive substrate;

[0020] (2) The polyurethane foam conductive substrate obtained in step (1) is used as the cathode, and copper is used as the anode for electroplating; when electroplating, the electroplating is carried out first, the electroplating solution is copper pyrophosphate system, the power supply is a unidirectional pulse power supply, and the pulse duty The ratio is 30%, and the current density is 20 A / m2. When the polyurethane foam strength after pre-plating reaches 0.5Mpa, then mixed plating is performed. At this time, the duty cycle is adjusted to 40% and the current density is 200 A / m2; For mixed plating, add 1200g of carbon ...

Embodiment 2

[0025] The preparation method of the hybrid porous metal material of this embodiment includes the following steps:

[0026] (1) A polyurethane foam with a thickness of 5mm and a porosity of 110PPI is used as the precursor, and an alkaline electroless plating system is used for electroless nickel plating for conductive treatment to obtain a conductive substrate;

[0027] (2) The conductive substrate polyurethane foam obtained in step (1) is used as the cathode, and nickel is used as the anode for electroplating; when electroplating, the electroplating is carried out first, the electroplating solution is nickel sulfate system, the power supply is a unidirectional pulse power supply, and the pulse duty cycle 30%, the current density is 30A / m2, when the polyurethane foam strength after pre-plating reaches 0.2MPa, then mixed plating is carried out. At this time, the duty cycle is adjusted to 50%, and the current density is 200A / m2. During plating, 1500g carbon powder with a particle siz...

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Abstract

The invention discloses a preparation method of a mixed porous metal material. The method comprises the following steps: (1) conductively treating a porous base material; (2) electroplating using a conductive substrate as a cathode and using electro-plated metal as an anode, firstly performing pre-electroplating, and then performing the mixed plating, adding the particles or fibrous material capable of degrading or ablating at 300-500 DEG.C in a plating solution when performing the mixed plating, taking down the mixed porous metal when the porosity of the porous metal achieves 85-95%; (3) burning the obtained mixed porous metal material for 10-30 minutes, wherein the added particles and fibrous material are burned together, performing reduction treatment on the mixed porous metal in reductant gas for 20-30 minutes at 300-900 DEG C to obtain the mixed porous metal material. The preparation method provided by the invention is simple in process, low in energy consumption, and low in cost, and can be used as liquid-adsorbing core material of a heating pipe and a uniform temperature board, electrode material of super capacitor and battery, and catalyst carrier material.

Description

Technical field [0001] The invention relates to a method for preparing porous materials, in particular to a method for preparing hybrid porous metal materials. Background technique [0002] With the continuous development of electronic technology, green energy, energy saving and environmental protection technology, high-performance chips, high-power light-emitting diodes, high-efficiency heat exchange, radiator components, etc. continue to emerge. Take the computer central processing unit (CPU) as an example, its computing speed is getting faster and faster, and the performance improvement is achieved through the high integration of the chip, which makes the heat density of the chip increasingly higher. In 2000, the heating density of the chip was only 10-15W / cm 2 , Has increased to 100W / cm so far 2 Therefore, the development of advanced heat dissipation technology is a guarantee for improving chip integration and stability. In view of the above situation, scientific and technol...

Claims

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Application Information

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Patent Type & AuthorityPatents(China)
IPC IPC(8): C25D1/08
Inventor张洪涛
OwnerCENT SOUTH UNIV