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Preparation method of tungsten copper oxide composite powder through hydro-thermal synthesis

A technology of tungsten copper oxide and composite powder is applied in the field of powder metallurgy, which can solve the problems of complicated preparation method and low uniformity, and achieve the effects of wide applicability, control of reaction and crystal growth, and easy operation.

Active Publication Date: 2013-07-31
HENAN UNIV OF SCI & TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] In view of the disadvantages of the prior art, such as the cumbersome preparation method of tungsten-copper composite powder and the low dispersibility and uniformity of the obtained composite powder, the present invention provides a preparation method of hydrothermally synthesized tungsten-copper oxide composite powder

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  • Preparation method of tungsten copper oxide composite powder through hydro-thermal synthesis
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  • Preparation method of tungsten copper oxide composite powder through hydro-thermal synthesis

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preparation example Construction

[0021] A preparation method for hydrothermally synthesizing tungsten-copper oxide composite powder, comprising the following steps:

[0022] Step 1: Take sodium tungstate and copper nitrate as raw materials according to the mass ratio of 1.42-0.20, and then prepare solutions respectively, wherein the concentration of copper nitrate is 2.0-2.2mol / L, and the concentration of sodium tungstate is 1.29-0.18mol / L. Then add the prepared sodium tungstate solution to the copper nitrate solution, mix thoroughly to obtain a mixed solution, and then use NaOH solution to adjust the pH value of the mixed solution to 5~6, so that the mixed solution appears sol;

[0023] Step 2: Put the sol-containing mixed solution obtained in Step 1 into a high-pressure reactor, react for 20-25 hours at a pressure of 6-20 MPa and a temperature of 160-180°C, and then cool naturally;

[0024] Step 3: After filtering out the reaction product obtained in Step 2, wash it with absolute ethanol and deionized water...

Embodiment 1

[0027] A preparation method for hydrothermally synthesizing tungsten-copper oxide composite powder, comprising the following steps:

[0028] Step 1: Take sodium tungstate and copper nitrate as raw materials according to the mass ratio of 1.42, and then prepare solutions respectively, wherein the concentration of copper nitrate is 2.0mol / L, and the concentration of sodium tungstate is 1.29mol / L, and then the prepared tungstic acid Add the sodium concentration to the copper nitrate solution, stir for 10 minutes, and ultrasonicate for 10 minutes at 25°C to make it fully mixed to prepare a mixed solution, and then use 2.5mol / L NaOH solution to adjust the pH value of the solution to 5, so that the mixed solution appears Sol;

[0029] Step 2: Put the sol-containing mixed solution obtained in Step 1 into a high-pressure reactor, react for 20 hours at a pressure of 10 MPa and a temperature of 160°C, and then cool naturally;

[0030] Step 3: After filtering out the reaction product ob...

Embodiment 2

[0032] A preparation method for hydrothermally synthesizing tungsten-copper oxide composite powder, comprising the following steps:

[0033] Step 1: Take sodium tungstate and copper nitrate as raw materials according to the mass ratio of 0.2, and then prepare solutions respectively, wherein the concentration of copper nitrate is 2.1mol / L, and the concentration of sodium tungstate is 0.18mol / L, and then the prepared tungstic acid Add the sodium concentration to the copper nitrate solution, stir for 12 minutes, and ultrasonicate for 10 minutes at 25°C to make it fully mixed to prepare a mixed solution, and then adjust the pH value of the solution to 5.5 with 2.5mol / L NaOH solution to make the mixed solution appear Sol;

[0034] Step 2: Put the sol-containing mixed solution obtained in Step 1 into a high-pressure reactor, react for 22 hours at a pressure of 12 MPa and a temperature of 165°C, and then cool naturally;

[0035] Step 3: After filtering out the reaction product obtai...

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Abstract

The invention relates to the technical field of powder metallurgy, in particular to a preparation method of tungsten copper oxide composite powder through hydro-thermal synthesis. The preparation method adopts the hydro-thermal synthesis method to prepare the tungsten copper oxide composite powder and further prepare a tungsten copper oxide composite powder in a reaction kettle; thermal decomposition is not needed to perform; a molecular-level mixed state in a solution is reserved; and the tungsten copper oxide composite powder with superfine particles and uniform tissue can be prepared; therefore, the sintering character of a tungsten copper alloy is improved, and the tungsten copper alloy with higher density and excellent heat conduction and electrical conductivity is prepared.

Description

technical field [0001] The invention relates to the technical field of powder metallurgy, in particular to a preparation method of hydrothermally synthesized tungsten-copper oxide composite powder. Background technique [0002] Tungsten-copper alloy has the advantages of high strength, high hardness, arc corrosion resistance and fusion welding resistance, so it is widely used in resistance welding, electrical contact materials, and plasma electrode materials for EDM. Specifically, it can be used as an important material for lead frames in large-scale integrated circuits, heat sink substrates in electronic devices such as solid-state microwave tubes, and rocket nozzle throat linings that can withstand short-term high-temperature thermal erosion in aerospace technology. For example, in the military, the heat resistance, high conductivity, arc resistance, and friction resistance of W-Cu composite materials are used as rail materials for electromagnetic guns, and the hig...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/24
Inventor 李继文赵晶晶魏世忠赵清张国赏徐流杰张盘龙
Owner HENAN UNIV OF SCI & TECH
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