A kind of method that solution method prepares metal cobalt

A metal cobalt and solution method technology, applied in the field of material powder preparation, can solve the problems of complex operation, low product purity and high cost, and achieve the effects of low preparation temperature, high product purity and low energy consumption

Active Publication Date: 2020-04-03
ZHEJIANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, the reaction solution system of the conventional liquid phase reduction method often needs to be completed by adding a variety of chemical reagents, which is costly, the product purity is not high, and the operation is complicated.

Method used

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  • A kind of method that solution method prepares metal cobalt
  • A kind of method that solution method prepares metal cobalt
  • A kind of method that solution method prepares metal cobalt

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0016] Weigh 0.6g of cobalt acetate tetrahydrate and dissolve it in a mixed solution composed of 55mL of ethylene glycol and 5mL of deionized water, stir to make it fully mixed and dissolved, transfer the above solution to a reaction kettle with a volume of 100mL, and put the closed reaction kettle in Preheat the oven to 140°C in advance, and raise the temperature of the oven to 200°C at a rate of 2°C / min, and then keep it at 200°C for 20 hours; after the reaction is completed, the reaction kettle is cooled to room temperature, and the mixture is filtered , washing, and drying to obtain metallic cobalt. The XRD pattern of gained metal cobalt is as figure 1 Shown in (a) among the figures, it can be seen from the figure that the product is metal cobalt of face-centered cubic and hexagonal crystal systems, without diffraction peaks of other impurities; digital photos are as follows figure 1 Shown in (b) and SEM microscopic appearance as figure 1 Shown in (c)-(d).

Embodiment 2

[0018] Weigh 1.3g of cobalt acetate tetrahydrate and dissolve it in a mixed solution composed of 60mL of ethylene glycol and 6.6mL of deionized water, stir to make it fully mixed and dissolved, transfer the above solution to a reaction kettle with a volume of 90mL, and put the closed reaction kettle into into an oven preheated to 150°C in advance, and raise the temperature of the oven to 210°C at a rate of 5°C / min, and then keep it at 210°C for 24 hours; After filtering, washing and drying, metal cobalt is obtained. The XRD pattern of gained metal cobalt is as figure 2 As shown in the figure, it can be seen from the figure that the product is mainly face-centered cubic and a small amount of hexagonal metal cobalt, without diffraction peaks of other impurities; the SEM morphology of the gained metal cobalt is as follows image 3 shown.

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Abstract

The invention discloses a method for using a solution method to prepare metal cobalt. According to the method, cobalt acetate tetrahydrate is dissolved in a mixture solution composed of ethylene glycol and deionized water, the solution is transferred to a high-pressure reaction still, the closed reaction still is placed in a preheated drying oven, the temperature of the drying oven rises to 200-210 DEG C at the speed of 2-5 DEG C per minute, the temperature is kept for 20-24 hours, the reaction still is cooled to room temperature after a reaction is finished, and the metal cobalt is obtained after the mixture solution is filtered, washed and dried. The method is simple in process and low in cost, and the finally-obtained product is high in purity.

Description

technical field [0001] The invention relates to the field of preparation of material powder, in particular to a method for preparing metal cobalt by a solution method. Background technique [0002] Metal cobalt is an important functional material, which has excellent physical and chemical properties and has important applications in many fields. Metal cobalt has excellent magnetic properties, so it has a wide range of applications in the fields of high-density storage media and magnetic memory devices. In addition, metal cobalt is also widely used in high-strength high-temperature alloys, industrial catalysis, functional ceramics, batteries and many other fields. [0003] At present, there are many methods for preparing metal cobalt, such as oxide reduction method, electrolysis method, liquid phase reduction method and so on. The oxide reduction method is to reduce cobalt oxides with reducing substances such as hydrogen and carbon monoxide to obtain metallic cobalt. The e...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): B22F9/24
Inventor 程继鹏马克远刘芙
Owner ZHEJIANG UNIV
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