A kind of preparation method of metal cobalt microsphere

A technology of metal cobalt and microspheres, applied in metal processing equipment, transportation and packaging, etc., to achieve the effect of enhancing automatic production, reducing agglomeration, and avoiding secondary pollution

Inactive Publication Date: 2017-12-19
HUZHOU TEACHERS COLLEGE
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few domestic researches in this field

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  • A kind of preparation method of metal cobalt microsphere
  • A kind of preparation method of metal cobalt microsphere
  • A kind of preparation method of metal cobalt microsphere

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Embodiment Construction

[0033] A preparation method of metal cobalt microspheres provided by the present invention comprises the following four key process steps.

[0034] The first step is to prepare micron-sized spherical cobalt hydroxide by hydrothermal method. The preparation of various forms of nano-micron cobalt hydroxide by hydrothermal method has been generally recognized. The key to preparing spherical cobalt hydroxide is to carry out the precipitation and dissolution equilibrium of cobalt hydroxide in the system gently, that is, to control the reasonable pH value and the concentration of cobalt ions in the solution at a lower temperature. In this process, there are cobalt ions, ammonium ions, hydroxide ions, EDTA, ammonia molecules, cobalt hydroxide and other substances in the solution, and there are various reaction balances between the above molecules or ions, and complex ions are generated. By calculating the corresponding equilibrium coefficients and complexation equilibrium constants,...

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Abstract

The present invention relates to a kind of preparation method of metal cobalt microsphere, and the steps are as follows: (1) prepare cobalt source mother liquor by cobalt nitrate and EDTA, then add ammoniacal liquor and water, make the pH value of solution 12.4; Then above-mentioned solution is transferred to reaction Add a high-purity metal cobalt plate into the kettle as a substrate, and react hydrothermally at 90-120°C, then rinse and dry; (2) Send the above-mentioned micron-sized spherical cobalt hydroxide together with the metal cobalt plate directly into the muffle furnace, and the heating rate is Control at 1-10°C per minute, final temperature at 250-350°C, and holding time for 3-5 hours; (3) Send the micron-sized spherical cobalt tetroxide cooled to about 200°C together with the metal cobalt plate directly into the reduction furnace. Control at 0.24-0.35Mpa, control the heating rate at 10-20°C per minute, control the final temperature at 600-800°C, and hold the holding time for 2-3 hours; (4) Use an ion fan to eliminate the static electricity of the metal cobalt microspheres after cooling, Then, the metal cobalt microspheres are subjected to multi-stage airflow winnowing to eliminate large particles larger than 20 μm.

Description

technical field [0001] The invention relates to a preparation method of metal cobalt microspheres. Background technique [0002] The existing application fields of spherical metal powder include powder metallurgy, 3D metal printing, battery, electronic packaging, precision preparation, etc. At present, the preparation methods of spherical metal particles are mainly crushing method (obtaining fine powder by crushing coarse particles or molten liquid) and synthesis method (obtaining fine powder by reaction, nucleation and growth, collection and post-treatment of ions, atoms and molecules). body method) two categories. For the former, the pulverization method can be roughly divided into three categories: gas atomization method and centrifugal atomization method based on droplet jet solidification into balls; shredding or punching remelting method based on mechanical shearing into balls; uniform droplet injection method and pulsed orifice jetting. The main disadvantages of th...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/22
CPCB22F9/22B22F1/065
Inventor 陈海锋童艳花王永亚徐敏虹唐培松潘国祥
Owner HUZHOU TEACHERS COLLEGE
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