Characteristics and Applications of Green Silicon Carbide Powder

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Green silicon carbide powder is produced through high-temperature smelting in a resistance furnace using raw materials such as quartz sand, petroleum coke (or coal coke), and wood chips (salt is added during the production of green silicon carbide). Green silicon carbide micro-powders, mainly available in 1200# and 1500#, are primarily used in the abrasive industry. Therefore, there are specific requirements for the grading of micro-powders, ensuring the absence of large particles through professional equipment for high-precision classification.

Chemical Composition:

The performance characteristics and applications of green silicon carbide powder are closely related to its chemical composition.

Performance Characteristics:

Green silicon carbide micro-powder exhibits a green color, with a crystal structure and high hardness. It possesses strong cutting ability and stable chemical properties. Additionally, it has excellent thermal conductivity. Microscopically, it appears as hexagonal crystals. The Mohs hardness of silicon carbide is 9.2, Vickers hardness ranges from 3000 to 3300 kilograms per square millimeter, and Knoop hardness is between 2670 and 2815 kilograms per square millimeter. Its microhardness is 3300 kilograms per cubic millimeter. In the abrasive industry, silicon carbide surpasses corundum but ranks lower than diamond, cubic boron nitride, and boron carbide. The density is generally considered to be 3.20 grams per cubic millimeter, and the natural bulk density of silicon carbide abrasive ranges from 1.2 to 1.6 grams per cubic millimeter. Its specific gravity is between 3.20 and 3.25. Green silicon carbide is primarily produced by high-temperature smelting using petroleum coke and high-quality silica as the main raw materials. Salt is added as an additive. It falls between corundum and diamond in terms of hardness and has higher mechanical strength than corundum.

Application:

1. Pipe wear-resistant coatings/aircraft engine wear-resistant coatings.

2. Diamond tools/ink plates/auxiliary materials for dry grinding.

3. Grinding and polishing of high-hardness steel tools used in precision tool manufacturing, both for single-sided and double-sided grinding.

4. Used in functional ceramics/functional ceramic stone/honeycomb ceramics/architectural ceramics.

5. Cutting of high-hardness silicon wafers/wire cutting/solar cell wire cutting.

6. Bearing processing/ultra-precision bearing grinding.

7. Processing of ceramic heat sinks/ceramic filter screens/ceramic membranes.

8. Coarse and fine-grinding media for flat double-sided grinding and polishing machines.

9. Sandblasting and grinding of hard alloys, metal grinding and polishing, and tombstone carving.

10. Production of oil stones/grinding stones/sharpening stones/brush rollers.

11. Polishing of optical glass/stone materials/marble polishing wheels/gemstone polishing/polishing discs.

Green silicon carbide powder is a high-performance abrasive material with excellent characteristics such as high hardness, strong cutting ability, and good thermal conductivity. Its applications span various industries, including aerospace, precision tool manufacturing, ceramics, semiconductor, and stone processing. The wide range of applications and superior properties of green silicon carbide powder make it an essential material in the field of abrasives and surface treatment.