Composite phase change powder material for selective laser sintering as well as preparation method and application of composite phase change powder material

Abstract

The invention discloses a composite phase change powder material for selective laser sintering as well as a preparation method and application of the composite phase change powder material. The composite phase change powder material comprises the following raw material components in parts by mass: 70-89 parts of paraffin, 10-20 parts of expanded graphite and 1-10 parts of superfine silica powder. The preparation method comprises the following steps of: preparing the paraffin powder and the expanded graphite powder, mixing the paraffin powder and the expanded graphite powder with the superfine silica powder, cooling to-40 DEG C, grinding and sieving to obtain the composite phase change powder material. The composite phase change powder material has the advantages of high latent heat, high thermal conductivity, good fluidity and the like, can be used for selective laser sintering molding, can be widely used for production and manufacturing of thermal management parts, and has very high use value and application prospects. The preparation method of the composite phase change powder material has the advantages of being simple in process, convenient to operate, low in cost and the like, is suitable for industrial production and is beneficial to large-scale application.

Description

technical field [0001] The invention belongs to the technical field of preparation of laser sintering powder materials, and relates to a composite phase-change powder material for selective laser sintering, a preparation method and application thereof. Background technique [0002] Phase change materials refer to substances that change the state of matter and provide latent heat under the condition of constant temperature. The process of changing physical properties is called a phase change process, and the phase change material will absorb or release a large amount of latent heat at this time. As an important latent heat material, phase change materials have broad application prospects in the fields of heat storage and heat management. The advantages of high density, easy control of the process, approximately isothermal heat storage and release process, wide controllable temperature range, and stable chemical properties have become key materials in the field of thermal ene...

AI Technical Summary

Problems solved by technology

[0005] Existing phase-change powder materials, such as paraffin / expanded graphite composite phase-change powder materials, have defects such as poor powder fluidity, low powder sphericity, and uneven particle size distribution in phase-change powder materials, so they are used as selective laser sintering. When preparing thermal management components from raw materials, there are still defects such as poor molding accuracy and difficult control, and large thermal cycle losses of thermal management components.

Images