Time：2023.11.21Browse：1
Graphite powder is a substance that is very sensitive to chemical reactions. In different environments, its resistivity will change, which means its resistance value will change. However, there is one thing that does not change. Graphite powder is one of the good non-metallic conductive substances. As long as the graphite powder is kept uninterrupted in an insulated object, it will also be electrified like a thin wire. However, there is no accurate number for the resistance value, Because the thickness of graphite powder varies, the resistance value of graphite powder will also vary when used in different materials and environments. Due to its special structure, graphite has the following special properties:
1) High temperature resistant type: The melting point of graphite is 3850 ± 50 ℃, and the boiling point is 4250 ℃. Even after being ignited by an ultra-high temperature arc, the weight loss and thermal expansion coefficient are very small. The strength of graphite increases with temperature, and at 2000 ℃, the strength of graphite doubles.
2) Conductivity and thermal conductivity: The conductivity of graphite is 100 times higher than that of ordinary non-metallic minerals. The thermal conductivity exceeds that of metal materials such as steel, iron, and lead. The thermal conductivity decreases with increasing temperature, and even at extremely high temperatures, graphite becomes an insulator.
3) Lubricity: The lubrication performance of graphite depends on the size of graphite flakes. The larger the flakes, the smaller the friction coefficient, and the better the lubrication performance.
4) Chemical stability: Graphite has good chemical stability at room temperature, and can withstand acid, alkali, and organic solvent corrosion.
5) Plasticity: Graphite has good toughness and can be connected into very thin sheets.
6) Thermal shock resistance: Graphite can withstand severe temperature changes without damage when used at room temperature. When the temperature suddenly changes, the volume of graphite does not change much and will not crack.
2023-04-03In recent years, graphite molds have continued to impact model shell sales markets with their high -quality characteristics, and have become the new darling of the machinery processing industry. The manufacturers of Kobwee Grapeite products below told everyone that the shortcomings and preventive methods of the heat treatment process of graphite mold.
Talking about the dangers of the storage hazards before the use of graphite crickets, the harm of the natural environment of Graphite to the performance of the natural environment is accumulated over time, and the harm is very large. Generally, it is stipulated that it is stored in a natural environment that is clean and irritable. Let's put it on the fixed wooden shelf to support the molten aluminum graphite. Difficulty in transportation, although graphite has very good thermal resistance, it is a very very easy to crush object. In the whole process of application and transportation, it is necessary to pay attention, and it should not make it a serious injury and other conditions.The value in the sales market is not very high, in fact, it is wrong to think so. Graphite looks very simple, it is commonly used in installing a variety of liquid state. However, in the industry lacks it, it will have a very large problem. Except for the industry's chemical manufacturing industry, it is no2023-03-02Talk about the hazard factors before the use of graphite.
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