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The properties of pressureless sintered silicon carbide ceramic products
•High temperature strength ---It can be used reliably in the air even when the temperature exceeds 1600°C (under inert gas and vacuum, the maximum temperature can reach 2000°C)
•Hardness---SSiC is a high-performance material second only to diamond and cubic boron nitride
•Wear resistance---ultra-high hardness and density make it ideal for parts often subject to high wear
•Thermal shock resistance---Due to the high thermal conductivity and low thermal expansion coefficient, it has excellent thermal shock resistance, and compared with other refractory materials, it performs better in rapid thermal cycling
•Corrosion, oxidation and erosion resistance--- high density, low porosity and chemical inertness make it work well in hot gas and liquid environments, oxidizing and corrosive gases, and strong acids and alkalis even at ultra-high temperatures
•High thermal conductivity- it has the equivalent thermal conductivity of graphite material, and 5 times of alumina
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Silicon carbide (SiC) is a lightweight ceramic material with high strength properties comparable to diamond. It has excellent thermal conductivity, low thermal expansion, and is resistant to acid corrosion. Silicon carbide is an excellent ceramic material suitable for applications requiring good corrosion resistance and wears resistance, such as gasket. Our silicon carbide gasket is useful in a variety of applications including spray nozzles, shot blast nozzles, and cyclone components.
methanidylidynesilicon; Carborundum; Silicon monocarbide; Betarundum Carborundeum; carbon silicide; Green densic
Silicon Carbide Gasket (SSiC) Specifications
Per your request or drawing
We can customized as required
The physical properties of pressureless sintered silicon carbide ceramics products
|（Composition：SiC）||vol %||≥ 98|
|Open Porosity||Vol %||0|
|（Flexural Strength 20°C)||MPa||320-400|
|Coefficient of thermal expansion||10-6K-1||4|
|（Thermal Conductivity 20°C )||Wm -1K-1||116|
|（Thermal Conductivity 1200°C||Wm -1K-1||35|
|（Modulus of Elasticity @ RT )||GPa||410|
|Thermal shock resistance )||Excellent|
|（Max. Service Temp (air) )||°C||Approx. 1600|
|Electrical Resistivity||Ω-m||1 to 4 10x|
|Specific Heat||J/kg-K||670 to 1180|
|Tensile Strength||MPa (Ultimate)||210 to 370|
|Young's Modulus||GPa||370 to 490|
Corrosion test results in liquids
Test Environment mg/cm2 yr）* Corrosive Weight Loss
|（wt%）Conc. Reagent||Temp. (˚C)||Sintering SiC (NO Free S i)||Reaction Bonded SiC (12%Si)||Tungsten Carbide (6% Co)||Aluminum Oxide (99%)|
|85%H 3 PO 4||100||<0.2||8.8||55.0||＞1000|
|10%HF plus NO 3||25||<0.2||＞1000||＞1000||16.0|
Test Time:125 to 300 hours of submersive testing, continuously stirred.
Corrosion Weight Loss Guide:
>1000 mg/cm2 yr Completely destroyed within days.
100 to 999 mg/cm2 yr Not recommended for servicegreater than a month
50 to 100 mg/cm2 yr Not recommended for servicegreater than one year
10 to 49 mg/cm2 yr Caution recommended, basedon the specific application.
0.3 to 9.9 mg/cm2 yr Recommended for long term service
<2mg/cm2 y Recommended for long term service; no corrosion, other than as a result of surface cleaning, was evidenced.
Comparison of Technical Data for Different Silicon carbide material
|Max. Service Temp (air)||℃||1380||1650||1650|
|Open Porosity||%||< 0.1||0||15|
|Bending Strength||Mpa||250 （20℃ ）||380||100|
|Mpa||280 (1200 ℃)||370||120|
|Modulus of Elasticity||Gpa||330 （20℃ ）||350||240|
|Gpa||300 (1200 ℃)||300||200|
|Thermal Conductivity||W/m.k||40 (1200 ℃)||35||10|
|Coefficient of Thermal Expansion||K -1 × 10-6||4.5||4.2||4.8|
|Main characteristics||Chemical Resistance||Fracture Toughness||High temp. High resistance.|
-High hardness, Mohs hardness rating of 9
-High thermal conductivity
-Its electrical conductivity between that of metals and insulating materials
– Low Density
-High Young’s modulus
-Low thermal expansion coefficient
-Resistance to chemical reaction and thermally resistant
-Outstanding thermal shock resistance
-Refractive index greater than a diamond
Applications of Silicon Carbide Gasket
Silicon carbide can be applied in areas such as semiconductors and coating.
-Silicon carbide is an ideal material for pump gaskets.
– A promising substitute for traditional semiconductors such as silicon in high-temperature applications.
-Grinding wheels and abrasive paper and cloth products
-High-temperature bricks and other refractories
-Abrasive and cutting tools
-Electronic circuit elements
-Thin filament pyrometry
Packing of Silicon Carbide Gasket
Sealed bags in carton boxes. Special package is available on request.
As a ceramic material, Silicon Carbide is quite fragile in a lot of cases. The Silicon Carbide Gasket are usually held in plastic bags by vacuum, and protected with heavy foam.
ATTs’ Silicon Carbide Gasket is carefully handled to minimize damage during storage and transportation and to preserve the quality of our products in their original condition.
The pressureless sintered silicon carbide rollers has the largest bearing capacity and the best oxidation resistance. It can be used below 1650 ℃ in oxidation atmosphere and has comprehensive corrosion resistance, which can be applied in any high temperature corrosion and harsh working conditions.
Silicon carbide (SiC) is a lightweight ceramic material with high strength properties comparable to diamond. It has excellent thermal conductivity, low thermal expansion, and is resistant to corrosion from acids. Silicon carbide is an excellent ceramic material for applications requiring good erosion and abrasive resistance.
The properties of pressureless sintered silicon carbide ceramic products •High temperature strength ---It can be used reliably in the air even when the temperature exceeds 1600°C (under inert gas and vacuum, the maximum temperature can reach 2000°C) •Hardness---SSiC is a high-performance material second only to diamond and cubic boron nitride
Silicon carbide beams is made of silicon carbide as the main material. It has the characteristics of high strength, high hardness, high wear resistance, corrosion resistance and good oxidation resistance, good thermal shock resistance, high temperature resistance, long-term use without deformation.