flake graphiteIt is a natural crystal graphite, which is like a fish scale, belongs to the hexagonal crystal system, and has a layered structure, so it also has good high temperature resistance, electrical conductivity, thermal conductivity, lubrication, plasticity and acid and alkali resistance. Below for everyone to say the use of flake graphite pay attention to matters?

Flake graphite is a product widely used in the metallurgical industry for refractory materials and coatings. Such as magnesia carbon brick, crucible, etc. It is now used as an anticorrosive material. Flake graphite is an anti-rust primer made of carbon black, talc and oil, with good chemical and solvent resistance. If chemical pigments such as zinc yellow are added to the formula, the anti-rust effect is better. When used, it has strong thermal shock resistance and good corrosion resistance. It is the main carbon raw material used in conjunction with refractory materials. It has an important influence on the erosion resistance and high temperature strength of carbon-bonded refractories such as magnesia-carbon bricks. In the actual production process, carbon-bonded refractories have strict requirements on the purity, ash content, particle size, shape and addition amount of flake graphite. Now its structure and function after high temperature firing depends to a large extent on the wettability of the graphite sheet by the high temperature silicate liquid. When wet, the silicate liquid phase flows into the intergranular space under the action of capillary forces. The flake graphite particles are bonded together by the adhesion between them, forming a layer of film around the flake, forming a continuum after cooling, and forming a higher bonding interface with it.

The surface tension of flake graphite is small, large area without defects, and the surface has about 0.45% of volatile organic compounds, which makes the wettability of graphite worse, and the strong hydrophobicity of the surface of flake graphite makes the fluidity of the castable worse. However, it is easy to aggregate and cannot be uniformly dispersed in the refractory, so that it is difficult to prepare a uniform and fine monolithic refractory. If the two are not wet, the flake graphite particles will form aggregates. The silicate liquid phase is confined within the interstices of the particles to form solitary bodies, which are difficult to sinter at high temperatures to form fine composites. Or in the case of heating, the rapid expansion of the volume (up to 300 times) to suffocate the flame, while producing expansion material, can isolate the flame, delay or interrupt the spread of the flame, itself non-combustible, good flexibility, high surface energy, carbonization layer is strong. Now the company is imported from the United States PerkinElmer testing equipment, advanced equipment, excellent product quality and long-term stability to provide a reliable guarantee. Now the company solemnly promises; the quality of the same quality price is better, the same price of the product quality is better, we produce the battery special graphite powder is the national quality products.

After the introduction of the above content, we also have a further understanding of the matters needing attention in the use of flake graphite. When I see him again in the future, I will not feel strange, and there will be no frequent problems in the process of using it. Well, that's all for today's content. I believe it will bring more wonderful knowledge points.