Examples of the application of graphite powder

There are many uses of graphite powder. Next, there are some examples to show you,

Graphite is a carbon material widely used in many fields of the national economy, and carbon black, diamond, carbon 60, carbon nanotubes, graphene, and other carbon allotropes. In a nutshell, graphite has temperature resistance, electrical conductivity, thermal conductivity, lubricity, chemical inertia, plasticity, and other characteristics. Graphite is often used in the manufacture of refractory materials, conductive materials, wear-resistant materials, lubricating materials, high-temperature resistant sealing materials, corrosion-resistant materials, heat insulation materials, adsorption materials, friction materials, and radiation-resistant materials.

Some new examples of graphite powder in the field of heat conduction and heat dissipation materials:

Patent CN 111040696 A published A high thermal conductivity magnetic shielding high strength waterproof potting adhesive made of graphite powder, its high thermal conductivity, good waterproof performance, high tensile strength, has A good application prospect.

The raw material formula of high thermal conductivity magnetic shielding and high strength waterproof potting adhesive described in the patent includes the following raw materials by weight: alumina 25-35, silicon carbide 5-15, and aluminum nitride 5-35 or more; One or more of flake nickel powder 1-8 parts, hydroxyl iron powder 3-15 parts, iron silicon aluminum 2-40 parts, iron-nickel powder 10-38 parts; One or more of 5-40 parts of graphene, 1-9 parts of graphite powder, 3-18 parts of graphite powder; Epoxy 2-7 parts, polyurethane 1-9 parts.

The high thermal conductivity magnetic shielding and high strength waterproof potting adhesive prepared by the invention is used for electronic potting and has high strength, good waterproof and thermal conductivity effect, good insulation, and magnetic shielding effect. In addition, the preparation process of the high thermal conductivity magnetic shielding and high strength waterproof potting adhesive is simple, the production energy consumption is low, and no “three wastes” are generated.

Patent CN 111149442 A discloses A method of using synthetic graphite powder to produce the thermally conductive film with excellent thermal conductivity compared to existing natural graphite film or metal film and with lower production cost.

The existing production process of thermal conductive graphite film is to produce thermal conductive graphite film by calcination of expensive polymer film such as polyimide film at 2000℃ to 3000℃. The cost of raw materials and equipment is relatively high, and it is difficult to produce roll products with large widths (such as 1000mm).

The manufacturing method of the thermally conductive film includes ① pretreating synthetic graphite powder under pressure or decompression; ② Adding the embedder to the pretreated synthetic graphite powder; (3) Heat treatment of synthetic graphite powder with an embedded agent; The heat-treated synthetic graphite powder is rolled.

Patent CN 110436940 A discloses A preparation method of carbon composite material with high thermal conductivity. Carbon/carbon composites have been successfully used in the preparation of key components of solid rocket engines such as throat lining and gas rudder due to their excellent mechanical properties at high temperatures and better ablative resistance.

The invention proposes a preparation method of carbon/carbon composite material with high thermal conductivity based on the fact that the process of graphite crushing is not disclosed in the existing technical scheme, which easily leads to the technical problem that the internal void of the finished carbon/carbon composite material is too large and affects the quality.

First of all, graphite is placed on the ultrasonic cleaning machine, and in accordance with 2.5% KOH aqueous solution into the ultrasonic cleaning machine, the use of ultrasonic cleaning graphite, after cleaning, into the hot air box for drying, will use the cutting machine to cut the graphite so that it is uniform in size block.

Put after cutting graphite in a shredder, carries on the preliminary crushing, after crushing and graphite particles in a shaking screen, to be able to get uniform graphite particles, and because the graphite with uniform particle size, so easy to crush of graphite, in place of graphite particles after crushing and grinding machine, In order to use the grinding machine to grind the graphite particles, making the graphite particles present the same size of the particles, and finally put the graphite particles into the oscillation box, vibrating the graphite, making the graphite fluffy state.

The invention through the graphite after cleaning, cutting, grinding, and grinding, can realize the uniform crushing of graphite, so that the obtained graphite can form a uniform size of powder particles, so after the graphite is pressed, there will be no gap, there will be no quality problems.

High purity graphite powder:

As the name suggests, high-purity graphite powder is highly purified, its conductivity is 100 times that of ordinary metals, and has good lubrication. High purity graphite powder is mainly used to make conductive coatings and high-strength graphite electrodes.