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Process for preparing nano graphite powder

A nano-graphite powder and nano-graphite technology, applied in the field of graphite, can solve the problems of unstable preparation process, high energy consumption and cost, and difficult to control results, and achieve good economic and social benefits, low cost and less impurities.

Inactive Publication Date: 2006-09-13
孟国军 +1
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  • Summary
  • Abstract
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  • Application Information

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Problems solved by technology

However, the energy consumption and cost of these methods are high, the process is complicated, and there may be instability in the preparation process, and the results are difficult to control.

Method used

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Embodiment 1

[0020] The first step is to fill graphite powder with a particle size of about 0.8mm into a plastic filter with a diameter of 30mm, a length of 120mm, a thickness of 0.5-1mm, and a plastic filter of more than 500 meshes. After compaction, it becomes the positive electrode, and graphite electrodes can also be used as the positive electrode. , use 2×30×120mm stainless steel as the negative electrode, immerse them in a single-cell electrolytic cell with tap water as the electrolyte, pass a full-wave or half-wave rectified current of 2-7A, the voltage is controlled between 4-10V, and the temperature The electrolytic oxidation is controlled at 30°C-70°C for 48 hours, and the ultrasonic probe is inserted into the electrolytic cell for ultrasonic dispersion for 20 minutes every 3-5 hours to obtain 3-5wt% ultrasonic electrolytic oxidation nano-graphite sol.

[0021] In the second step, when the graphite particles are at 3-5wt%, the graphite sol is naturally precipitated, and the graphi...

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Abstract

The present invention discloses ultrasonic electrolysis process of preparing graphite powder. The graphite electrode inside filtering plastic net as positive electrode and stainless steel or titanium plate as negative electrode are soaked inside water electrolyte in electrolytic bath and power supply is applied for ultrasonic electrolysis to obtain graphite gel; and graphite gel is processed through natural deposition, filtering and low temperature drying to obtain nanometer graphite powder of 100 nm below size. The present invention has the features of low power consumption, high efficiency and high product purity.

Description

technical field [0001] The present invention relates to graphite, in particular to a method for preparing graphite powder, more particularly, the present invention relates to a method for preparing nano-graphite powder. Background technique [0002] Graphite powder is a widely used material and can be used as a raw material for casting materials, refractory materials, dyes, electrode pastes, etc. According to the different requirements for graphite materials, the particle diameter of graphite powder also varies greatly. [0003] Nano-graphite powder is a new type of material with high electrical conductivity, thermal conductivity, high lubrication, stealth, shielding batteries and other technologies. The preparation of nano-graphite powder is the development direction of carbon materials. [0004] In the prior art, there are many ways to obtain ultrafine graphite powder, such as the preparation method of ultrafine graphite powder disclosed in Patent Publication No. CN124449...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C01B31/04
Inventor 孟国军
Owner 孟国军
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