Silicon Carbide Abrasive Grains Black SiC

Silicon carbide (SiC) is a compound composed of silicon and carbon elements and is widely used in industrial materials.The main raw materials are quartz sand and coke. Quartz sand and coke are heated to above 2000°C in a high-temperature furnace to generate silicon carbide through chemical reaction. After the silicon carbide generated at high temperature is cooled, it is crushed and sieved to obtain silicon carbide particles of different sizes. Through screening and grading, the silicon carbide particles are classified by size and finally packaged.

1

The thermal conductivity of silicon carbide grains products decreases sharply with the increase of clay content. For example, when the clay increases from 2% to 10%, the thermal conductivity will decrease by 23-29%.

2

The thermal stability of silicon carbide grains products is very high. It takes about 10 cold water cycles before cracks begin to appear, and more than 30 cycles before the weight loss is 20%. The porosity of the product is generally very high, about 25~30%, because the blank formed by the silicon carbide particles has a large porosity. Therefore, the air permeability coefficient of the product is also very high.

3

The heat resistance of silicon carbide grains products. The ability of silicon carbide to withstand repeated heating in an oxidizing medium without bubbling and slagging is called heat resistance. It is expressed by the temperature at which bubbling and slagging occur. After three or four repeated heating, its heat resistance can be accurately determined. The operating temperature of silicon carbide grains products should be 50-100℃ lower than the heat resistance.

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