Introduction Of Silicon Carbide

1. Thermal conductivity and linear expansion coefficient of silicon carbide. As a refractory material, carbonized bricks have superior thermal shock resistance. This is reflected in its high thermal conductivity (thermal conductivity) and low coefficient of linear expansion.

2. Conductivity of silicon carbide. Silicon carbide is a semiconductor whose electrical conductivity varies depending on the type and number of impurities introduced into the crystal.

3. Resistivity of silicon carbide. The resistivity of silicon carbide changes with temperature, but it is contrary to the resistance temperature characteristics of metals within a certain temperature range. The conductivity of silicon carbide peaks when the temperature rises to a certain value, and if the temperature continues to increase, the conductivity will decrease again.

There are many preparation methods for silicon carbide, including sublimation, reaction sintering, hot press sintering and chemical vapor deposition. Among them, the sublimation method and the reaction sintering method are the most used. The sublimation method is to obtain silicon carbide by heating silicon and carbon at high temperatures, sublimating them and recrystallizing them at low temperatures. The reaction sintering method is to mix silicon and carbon and then sinter at high temperatures.

1. Application of non-ferrous metal metallurgical industry: the use of silicon carbide has high temperature resistance, high intensity, good heat conductivity, impact resistance, and is used as a high-temperature indirect processing material.

2. Application in pig iron industry: use the erosion resistance of silicon carbide. Resistant to thermal shock and abrasion. Good thermal conductivity for heavy-duty blast furnace lining transfers the use of furnace age.

3. The application of grinding wheel industry: it is beneficial to its thermal conductivity parameters. Thermal radiation, high heat characteristics, the manufacture of thin plate kiln furniture, not only can reduce the storage capacity of kiln furniture, but also mobilize the storage capacity and commodity quality of the kiln, shorten the production cycle, is an ideal indirect material for porcelain glaze baking and sintering.

4. Application of smelting and beneficiation industry: silicon carbide hardness is second only to diamond, has strong wear-resistant function, is an ideal material for wear-resistant pipes, impellers, pump chambers, cyclones, and bucket lining, and its wear-resistant function is cast iron. Rubber is 5-20 times the age of the furnace, and it is also one of the ideal materials for aerospace runways.

5. Energy-saving application: using silicon carbide abrasive's good thermal conductivity and heating stability, as a heat exchanger, fuel consumption is reduced by 20%, fuel saving is 35%, and the yield is mobilized by 20-30%.

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