Silicon Carbides (SiC & SiSiC)

Silicon Carbide Ceramics has superior rapid cooling and rapid heating resistance, wear resistance, oxidation resistance, high bending strength, no falling slag, no crazing, have a long time service life, effective to control the uniform temperature inside the kilns and maintains high mechanical strength in temperatures as high as 1700°C. Silicon carbide has excellent hard wearing properties. It is not only the lightest, but also the hardest ceramic material and has excellent thermal conductivity, low thermal expansion and is very resistant to acids and chemicals.

Benefits using Silicon carbides

  • Corrosion resistant
  • High hardness
  • Chemically and thermally resistant
  • High thermal conductivity
  • Good RT and HT strength

Application of Silicon Carbide

  • Sliding bearings
  • Mechanical Seals for chemical pumps
  • Wear parts such as Thread guides
  • Kiln furniture crucibles
  • Burners for high temperature Furnaces
  • Sand Blasting Nozzles
  • Heat exchangers tubes
  • Semiconductor handling parts
  • Wafer processing Plates & Discs components

Technical Data of SiC & SiSiC - Silicon Carbide

Properties SiC SiSiC
Density (g/cc) SiC (99%) 3.2
Porosity % (sub-micron) 3.15 ±0.03 0.0%
Maximum Temperature (°C) 410 1150°C
Flexural Strength (MPa) @ RT 2800 800
Weibull Modulus 3970 (560) 15-30
Elastic Modulus (GPa) 4 310
Poisson’s Ratio 0.21 0.27
Hardness HV (0.3) Kg/mm2 4×10-6 1800
Fracture Toughness (MPam1/2) 120 5.5
Abrasive Wear Resistance Parameter 0.67 1110
Thermal Expansion Coeff. 10-6/C; (RT-1000 C) 1500 3.1

Property values are estimated-typical and shouldn’t be considered as specifications.

Corosion Test Results

Test Environment* Corrosive Weight Loss,mg/cm2/yr
Concentration Reagent, Wt% Temperature SiC SiSiC
98% H2SO4 100°C 1.5 50.0
50% NaOH 100°C 2.5 >1000
53% HF 100°C <0.2 7.0
85% H3PO4 100°C <0.2 8.0
70% HNO3 100°C <0.2 0.5
45% KOH 100°C <0.2 >1000
25% HCl 100°C <0.2 0.9
10% HF plus 57% HNO3 25°C <0.2 >1000

*125-300 hours of testing in all acids and continuously stirred.

Products-Components Photos

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