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Preparation method of superfine cobalt powder

A technology of ultra-fine cobalt powder and cobalt powder, which is applied in the field of metal processing, can solve the problems of high production cost, large Co powder particles, and difficulty in mass production, and achieve the effects of preventing spontaneous combustion, low reduction temperature, and fine particle size

Pending Publication Date: 2022-01-11
XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The liquid phase reduction method can prepare monodisperse particles well, but the prepared Co powder particles are relatively large; the Co powder particles prepared by the precipitation thermal decomposition method are prone to sticking; It is still in the stage of experimental research or it is difficult to produce in large quantities due to the problems of complex process and high production cost

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  • Preparation method of superfine cobalt powder
  • Preparation method of superfine cobalt powder
  • Preparation method of superfine cobalt powder

Examples

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Embodiment 1

[0027] A kind of embodiment of the preparation method of ultrafine cobalt powder described in the present invention, the preparation method described in this embodiment comprises the following steps:

[0028] (1) configuration oxalate ion concentration is that the concentration of sodium oxalate solution of 1.6mol / L and cobalt ion is the cobalt nitrate solution of 0.8mol / L; Wherein, the massfraction that also contains accounting for cobalt nitrate is 3% Complexing agent ammonium nitrate.

[0029] (2) The sodium oxalate solution and the cobalt nitrate solution flow into the sodium nitrate mother liquor (the concentration of nitrate ion is 0.8mol / L) through the co-current method, and the co-current precipitation process is carried out under the ultrasonic and microwave environment, and the ultrasonic and microwave functions are simultaneously Turn on, wherein, the ultrasonic frequency is 90Hz, the microwave power is 3kW, the flow rate ratio of sodium oxalate solution and cobalt ...

Embodiment 2

[0033] An embodiment of the preparation method of the ultrafine cobalt powder of the present invention, the difference between the preparation method described in this embodiment and Example 1 is that in the step (4), the reduction temperature is 450°C, and the reduction time is 70min.

Embodiment 3

[0035] An embodiment of the preparation method of the ultrafine cobalt powder of the present invention, the difference between the preparation method described in this embodiment and Embodiment 1 is that in the step (2), the ultrasonic frequency is 80 Hz, and the microwave power is 2 kW; In the step (4), the reduction temperature is 500°C.

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Abstract

The invention discloses a preparation method of superfine cobalt powder, and relates to the technical field of metal processing. The preparation method of the superfine cobalt powder comprises the following steps that (1) an oxalate solution and a cobalt salt solution are prepared; (2) cobalt oxalate is prepared in ultrasonic and microwave environments; (3) the cobalt oxalate is washed, filtered and dried; and (4) the cobalt oxalate is reduced into cobalt powder in a microwave muffle furnace. Compared with an existing method for preparing cobalt powder, the cobalt powder prepared through the method is finer in particle size and more uniform. The synthesis rate is high, so that the use of raw material reagents is effectively saved; and in the preparation process, energy needed in the preparation process of a precursor and the reduction process is greatly reduced, and the production cost is reduced.

Description

technical field [0001] The invention relates to the technical field of metal processing, in particular to a preparation method of ultrafine cobalt powder. Background technique [0002] Cobalt is widely used in aviation, aerospace, electrical appliances, machinery manufacturing, chemical and ceramic industries. Cobalt-based alloys or cobalt-containing alloy steels are used as blades, impellers, ducts of gas turbines, jet engines, rocket engines, missile components, various high-load heat-resistant components in chemical equipment, and important metal materials in the atomic energy industry. As a binder in powder metallurgy, cobalt can ensure that the related alloy has a certain toughness. Magnetic alloys are indispensable materials in modern electronics and electromechanical industries, and are used to manufacture various components of sound, light, electricity and magnetic equipment. Cobalt is also an important component of permanent magnetic alloys. In the chemical indus...

Claims

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Application Information

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IPC IPC(8): B22F9/22
CPCB22F9/22
Inventor 王云王权朱刘
Owner XIANDAO THIN FILM MATERIALS GUANGDONG CO LTD
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