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Preparation method for high-dispersion superfine nanometer Mo-Cu compound powder

An ultra-fine nano, composite powder technology, applied in the field of powder metallurgy preparation, can solve the problems of complex process, high equipment requirements, long preparation period, etc., and achieve the effects of easy process, uniform structure distribution and high density

Inactive Publication Date: 2015-04-01
HUNAN UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

But there are corresponding shortcomings. The existing chemical methods include metal oxide co-reduction method, chemical evaporation condensation method, mechanical thermochemical method, chemical plating method, etc. These methods have high requirements for equipment, or the process is relatively complicated, and some of them need multiple stages. Reduction, or the preparation cycle is very long

Method used

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  • Preparation method for high-dispersion superfine nanometer Mo-Cu compound powder
  • Preparation method for high-dispersion superfine nanometer Mo-Cu compound powder
  • Preparation method for high-dispersion superfine nanometer Mo-Cu compound powder

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (1) Take by weighing 16.94g sodium molybdate dihydrate, 7.70g cupric chloride dihydrate, measure 0.1L mass fraction and be the strong ammoniacal liquor of 25%, be mixed with the aqueous solution of sodium molybdate, the ammonia solution of cupric chloride, mix Add deionized water to make a 0.5L mixed solution.

[0024] (2) Divide the solution prepared in (1) into four equal portions, place them in a magnetically stirred constant temperature water bath container and heat in a 60° C. water bath for 10 minutes.

[0025] (3) The solution obtained in (2) is filtered, washed and dried.

[0026] (4) Calcining the precipitate obtained in (3) at 350° C. in air for 1 h to obtain molybdenum-copper oxide composite powder.

[0027] The composite powder prepared in (4) was kept in H2 at 750° C. for 2 hours to obtain 70Mo-30Cu nano-molybdenum-copper composite powder. from figure 1 It can be seen that the powder obtained in Example 1 is composed of molybdenum and copper.

[0028] D...

Embodiment 2

[0033] (1) Take by weighing 19.36g sodium molybdate dihydrate, 5.17g cupric chloride dihydrate, measure 0.08L mass fraction and be the strong ammoniacal liquor of 28%, be mixed with the aqueous solution of sodium molybdate, the aqueous ammonia solution of cupric chloride, mix Add deionized water to make a 0.5L mixed solution.

[0034] (2) Divide the solution prepared in (1) into four equal portions, place them in a magnetically stirred constant temperature water bath container and heat in a water bath at 80° C. for 5 minutes.

[0035] (3) The solution obtained in (2) is filtered, washed and dried.

[0036] (4) Calcining the precipitate obtained in (3) at 450° C. in air for 0.5 h to obtain molybdenum-copper oxide composite powder.

[0037] (5) Heat the composite powder prepared in (4) at 600° C. for 3 h in H2 to obtain 80Mo-20Cu nanomolybdenum-copper composite powder.

Embodiment 3

[0039] (1) Take by weighing 18.88g sodium molybdate dihydrate, 10.77g cupric chloride dihydrate, measure 0.1L mass fraction and be the strong ammoniacal liquor of 26%, be mixed with the aqueous solution of sodium molybdate, the ammonia solution of cupric chloride, mix Add deionized water to make a 0.5L mixed solution.

[0040] (2) Divide the solution prepared in (1) into four equal portions, place them in a magnetically stirred constant temperature water bath container and heat in a water bath at 70° C. for 15 minutes.

[0041] (3) The solution obtained in (2) is filtered, washed and dried.

[0042] (4) Calcining the precipitate obtained in (3) at 400° C. in air for 2.5 hours to obtain molybdenum-copper oxide composite powder.

[0043] (5) Heat the composite powder prepared in (4) at 800° C. for 2 h in H2 to obtain 65Mo-35Cu nanomolybdenum-copper composite powder.

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Abstract

The invention discloses a preparation method for high-dispersion superfine nanometer Mo-Cu compound powder. Firstly, an ammonia-water solution of copper salt is added to a deionized water solution of molybdenum salt, a mixed solution is formed, the pH of the mixed solution is adjusted to be 5-7, then the water solution is heated, filtered, washed, dried and calcined, and precursor molybdenum and copper oxide power is obtained; secondly, the precursor powder is restored in hydrogen, and the high-dispersion superfine nanometer Mo-Cu compound powder is obtained. The nanometer powder prepared through the method has the advantages of being large in specific surface area, fine and uniform in particle diameter, high in purity and the like. Through the simple and effective method that the molybdenum and copper precursor powder is prepared through chemical coprecipitation, magnetic stirring and thermostatic waterbath heating, and then is calcined and restored, the method is simple and rapid, the process is easy to operate and control, the yield of the powder is large, efficiency is high, and the preparation method is suitable for industrial volume production.

Description

technical field [0001] The invention discloses a preparation method of highly dispersed ultrafine nanometer Mo-Cu composite powder, which belongs to the technical field of powder metallurgy preparation. Background technique [0002] Molybdenum-copper composite material is a pseudo-alloy, which combines the high melting point and high strength of molybdenum with the high plasticity and high conductivity of copper, and has good comprehensive properties such as high temperature resistance and ablation resistance. Molybdenum-copper materials were mainly used as electrical contacts of high-voltage switches in the past. In recent years, they have been widely used in electrical and electronic, instrumentation, national defense, aerospace and other fields. [0003] Because Mo and Cu are incompatible with each other, the sintering performance of Mo-Cu alloy prepared by ordinary "powder mixing + molding + liquid phase sintering" process or infiltration method is low, and there are sho...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F9/26
Inventor 郭世柏孙靖刘礼新蔡春波
Owner HUNAN UNIV OF SCI & TECH
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