Speaking of silicon carbide, is it not that some people will have a face Meng circle? So speaking of silicon carbide, what is this? In fact, the use of silicon carbide in our daily life should not be underestimated, but what we see are finished products made of silicon carbide, and we have little contact with the raw materials of silicon carbide. So what is silicon carbide? What are the uses of silicon carbide? Today let the small thousand of the thousands of letters resistant materials to everyone talk about those things silicon carbide!

What is silicon carbide?

Silicon carbide, also known as carbonite, is a widely used and economical kind, which can be called gold steel sand or refractory sand. At present, China's industrial production of silicon carbide is divided into black silicon carbide and green silicon carbide two kinds, are hexagonal crystals, the specific gravity of 3.20 ~ 3.25, microhardness of 2840 ~ 3320kg/mm2.

What are the main components of silicon carbide?

Silicon carbide (SiC) is made from quartz sand, petroleum coke (or coal coke), wood chips (salt is required to produce green silicon carbide) and other raw materials by high temperature smelting through a resistance furnace. Silicon carbide also exists in nature as a rare mineral, moissanite. Silicon carbide is also known as carbonite. In the contemporary C, N, B and other non-oxide high-tech refractory raw materials, silicon carbide is widely used and economical, which can be called gold steel sand or refractory sand. At present, China's industrial production of silicon carbide is divided into black silicon carbide and green silicon carbide two kinds, are hexagonal crystals, the specific gravity of 3.20 ~ 3.25, microhardness of 2840 ~ 3320kg/mm2.


What are the uses of silicon carbide?

Silicon carbide is widely used in refractory materials, consolidated abrasives, coated abrasives, engineering ceramics, etc., with corrosion resistance, erosion resistance and a certain electrical and thermal conductivity. High-density large crystalline silicon carbide is the aggregate of high-quality refractory materials. The coarse silicon carbide material can be supplied in large quantities and cannot be counted as high-tech products, and the application of nano-scale silicon carbide powder with high technical content cannot form economies of scale in a short time.
Purpose:

1, abrasive - mainly because silicon carbide has a high hardness, chemical stability and a certain toughness, so silicon carbide can be used to manufacture consolidated abrasives, coated abrasives and free grinding, so as to process glass, ceramics, stone, cast iron and some non-ferrous metals, cemented carbide, titanium alloy, grinding wheels and so on.

2, refractory materials and corrosion resistant materials - mainly because silicon carbide has a high melting point, chemical inertia and thermal vibration resistance, so silicon carbide can be used for grinding tools, ceramic products fired into the kiln with the shed and saggar, zinc smelting industrial vertical cylinder distillation furnace with silicon carbide bricks, aluminum electrolytic cell lining, crucible, small pieces of furnace materials and other silicon carbide ceramic products.

3. Chemical use - because silicon carbide can be decomposed in molten steel and react with oxygen and metal oxides in molten steel to produce carbon monoxide and silicon-containing slag. Therefore, it can be used as a purifying agent for smelting steel, that is, as a deoxidizer for steelmaking and a cast iron tissue improver. This generally uses low-purity silicon carbide to reduce costs.
4, electrical use - used as heating elements, nonlinear resistance elements and high semiconductor materials. Heating elements such as silicon carbon rod, nonlinear resistance elements, various types of lightning arrester valve disc.

5, other prepared into far-infrared radiation coating or made of silicon carbide silicon plate with far-infrared radiation dryer.