Preparation method of carbon tube coated magnetic material and magnetic oriented heat conduction material

Abstract

The invention discloses a preparation method of a carbon tube coated magnetic material and a magnetic oriented heat conduction material. The preparation method of the carbon tube coated magnetic material comprises the following steps: S1, respectively dissolving a cobalt source and 2-methylimidazole in methanol for mixing, then enabling them to react to obtain a mixed solution C, carrying out solid-liquid separation on the mixed solution C to obtain a precipitate, and drying the precipitate to obtain a framework material; S2, calcining the framework material for the first time under a hydrogenand argon mixed atmosphere to obtain an intermediate material; S3, calcining the intermediate material for the second time under an air atmosphere to prepare the carbon tube coated magnetic material.The carbon tube coated magnetic material prepared by the preparation method has higher magnetic stability, good magnetic response effect, better heat transfer uniformity and higher heat transfer speed. In addition, under the action of an external magnetic field, a heat conduction channel consistent with the heat conduction direction can be formed, so that the heat transfer efficiency of the heatconduction material is improved.

Description

technical field [0001] The invention relates to the technical field of thermally conductive materials, in particular to a method for preparing a carbon tube-coated magnetic material and a magnetically oriented thermally conductive material. Background technique [0002] With the rapid development of electronic technology, electronic equipment continues to integrate more powerful functions into smaller components, and the efficiency of electronic products continues to increase. At the same time, the heat generated by various components during work is also increasing. It poses a serious threat to the stability, reliability and service life of electronic equipment. In order to solve the heat dissipation problem during the operation of electronic equipment, heat dissipation materials with heat conduction function are widely used in the above fields. [0003] The thermal conductivity of thermally conductive materials is a key parameter to evaluate the performance of thermally con...

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Problems solved by technology

[0003] The thermal conductivity of thermally conductive materials is a key parameter to evaluate the performance of thermally conductive materials. In order to improve the thermal conductivity of materials, most of them are filled with thermally conductive fillers in the matrix of polymer materials. Among them, carbon-based thermally conductive fillers are widely used, such as carbon nanotubes, but they are randomly oriented. Filling carbon nanotubes into polymers does not have an ideal effect on the thermal conductivity of the material. Using the magnetic field-induced alignment method, ordered carbon nanotubes can be obtained. Compared with randomly oriented carbon nanotubes, ordered carbon nanotubes Nanotubes have more excellent performance and functional characteristics, such as the ability to form more excellent network channels, but the existing technology generally loads magnetic materials on the outside of carbon nanotubes, resulting in magnetic instability of carbon nanotubes, which in turn leads to carbon nanotubes filled with carbon nanotubes. Nanotubes are inefficient heat transfer materials

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