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A metal cobalt microsphere

A technology of metal cobalt and microspheres, applied in metal processing equipment, transportation and packaging, etc., to improve product competitiveness, avoid secondary pollution, process difficulty and reduce energy consumption costs

Inactive Publication Date: 2017-11-10
HUZHOU TEACHERS COLLEGE
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

There are few domestic researches in this field

Method used

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  • A metal cobalt microsphere
  • A metal cobalt microsphere
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Embodiment Construction

[0033] A metal cobalt microsphere provided by the present invention, the preparation method of the cobalt microsphere 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 complexa...

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Abstract

The present invention relates to a kind of metal cobalt microsphere, and preparation 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 in the reactor , adding a high-purity metal cobalt plate as a substrate, hydrothermal reaction at 90-120°C, then washing and drying; (2) The above-mentioned micron-sized spherical cobalt hydroxide and the metal cobalt plate are directly sent into the muffle furnace, and the heating rate is controlled at 1-10°C per minute, the final temperature is controlled at 250-350°C, and the holding time is 3-5 hours; (3) The micron-sized spherical cobalt tetroxide cooled to about 200°C is directly sent into the reduction furnace together with the metal cobalt plate, and the air pressure is controlled at 0.24-0.35Mpa, the heating rate is controlled at 10-20°C per minute, the final temperature is controlled at 600-800°C, and the holding time is 2-3 hours; (4) Use an ion fan to eliminate the static electricity of the metal cobalt microspheres after cooling, and then carry out Multi-stage airflow winnowing eliminates large particles above 20μm.

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): B22F9/22B22F1/00
CPCB22F9/22B22F1/065
Inventor 陈海锋唐培松潘国祥童艳花徐敏虹曹枫
Owner HUZHOU TEACHERS COLLEGE
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