Black Silicon Carbide Lump

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Address

NO.1580,wensheng street , Shouguang City, Shandong Province, China

Tel :

( +86 ) 536 5108122

E-mail :

Yuanye@163.com

MAIN FEATURE :

1、The chemical properties

(1) oxidation resistanceWhen the silicon carbide materials when heated to 1300in air in the silicon carbide crystal surface to start generating the protective layer of silicon dioxide. With the thickening of protection layer, prevent the internal oxidation silicon carbide continue to be, that make the silicon carbide has good oxidation resistance. When the temperature is above 1900 k (1627 ℃), silicon dioxide protective film to be destroyed, oxidation of silicon carbide, So the 1900 k is silicon carbide in the oxidizing atmosphere under the highest working temperature.

(2) acid and alkaliIn terms of acid, alkali, and the function of oxide, as a result of the action of sio2 protective film, silicon carbide strong acid resistance, alkali resistance is a bit poor.

2、The physical and mechanical properties

(1) Density:All kinds of silicon carbide crystal shape grain density is very close, generally considered to be 3.20 g / 3 mm, The silicon carbide abrasive nature of packing density between 1.2-1.6 g / 3 mm, it depends on particle size, particle size and particle shape.

(2) The hardness:Silicon carbide mohs hardness is 9.2~9.8 , the Williams dense microscopic hardness is 3000-3300 kg/mm 2, Knoop hardness is 2670-2815 kg/mm, higher than in the abrasive corundum, second only to diamond and cubic boron nitride and boron carbide.

(3)Thermal conductivityThe thermal conductivity of silicon carbide products is very high, thermal expansion coefficient is small , the thermal shock resistance is very high, is of high quality refractory materials.

3、Electrical properties

Room temperature industrial silicon carbide is a kind of semi conductor, electrical conductivity of impurities. The high purity silicon carbide with the increase of temperature resistivity drops, different impurities silicon carbide according to its impurity, conductive performance is also different. Another electrical properties of silicon carbide is electroluminescent, has now developed a practical device.

4、Other properties

Good hydrophilicity,far-infrared radiation,and soon.

Application

1、The purpose of the abrasives

Black silicon carbide is produced at high temperature in an electric resistance type furnace with quarts sand and petroleum coke as its main raw materials. It is used for making bonded and coated abrasive tools, grinding metal and non-metal materials of lower tensile strength, such as gray cast iron yellow bronze,aluminum, stone, leather, rubber, etc.

2、The chemical industry use

It can be used as modifier steelmaking deoxidizer and iron group, can be used as manufacture of silicon tetrachloride raw material, is the main raw material of silicone industry. silicon carbide deoxidizer is a new kind of compound deoxidizer instead of traditional silicon powder carbon powder for deoxidizeby comparing the original process and the various physical and chemical performance is more stable, the deoxidization effect is good, deoxidize time shortened, save energy and improve the efficiency of steel,save energy and improve the efficiency of steel, improve the working conditions, improve the comprehensive economic benefits of electric furnace has important value.

3. Refractory used for abrasion resistance and corrosion resistant materials. Using silicon carbide has corrosion resistance, high temperature resistance, strength, impact resistance and other properties, heat conduction performance is good, silicon carbide on the one hand, can be used for various components of smelting furnace lining, high temperature furnaces, silicon carbide plate, plate, supports, sagger, silicon carbide crucible, etc.

Silicon carbide on the one hand, can be used for various components of smelting furnace lining, high temperature furnaces, silicon carbide plate, plate, supports, sagger, silicon carbide crucible, etc. Distillation furnace, such as vertical distillation furnace tray, aluminium electrolyzer, copper melting furnace lining, furnace zinc powder with arc plate, t