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  • Silicon carbide CAS#409-21-2
  • Silicon carbide CAS#409-21-2
  • Silicon carbide CAS#409-21-2
  • Silicon carbide CAS#409-21-2
  • Silicon carbide CAS#409-21-2

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Silicon carbide CAS#409-21-2

Silicon carbide CAS#409-21-2

Basic Information

High Hardness & Wear Resistance：Extremely hard material with excellent abrasion resistance.


Corrosion & Slag Resistance：Performs well against molten slag and harsh environments.


Thermal Shock Resistance：Withstands rapid temperature changes without cracking.


High Conductivity & Multiple Structures：Offers good electrical conductivity and various polytypes for versatile applications.


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product description

Products Description of Silicon carbide CAS#409-21-2

Silicon carbide, a hard covalent material, is made by carbothermal reduction of silica at >2200 °C in electric furnaces. It features outstanding abrasion, corrosion and thermal shock resistance, with moderate electrical conductivity and oxidation susceptibility. It exists in hundreds of polytypes, mainly cubic β-SiC and hexagonal/rhombohedral α-SiC.


Product Application of Silicon carbide CAS#409-21-2

Silicon carbide, a rare fully synthetic refractory mineral, has four main bonding systems: oxide, Si₂ON₂, Si₃N₄ and self-bonded. The first three are permeable and prone to bond-phase corrosion, while self-bonded SiC is impermeable with only surface corrosion. Produced by reaction bonding or sintering, self-bonded variants have similar chemical resistance but distinct physical properties.

Product Information

Parameters


Melting point2700 °C (lit.)
bulk density0.069g/cm3
density3.22 g/mL at 25 °C (lit.)
refractive index2.65
solubilitySoluble in molten sodium hydroxide, potassium hydroxide and in molten iron.
formnanopowder
colorGreen
Specific Gravity3.22
Resistivity107–200 (ρ/μΩ.cm)
Water SolubilitySoluble in molten alkalis (NaOH, KOH) and molten iron. Insoluble in water.
Hydrolytic Sensitivity1: no significant reaction with aqueous systems
Crystal StructureCubic, Sphalerite Structure - Space Group F(-4)3m
Merck148,492
Exposure limitsACGIH: TWA 10 mg/m3; TWA 3 mg/m3; TWA 0.1 fiber/cm3
OSHA: TWA 15 mg/m3; TWA 5 mg/m3
NIOSH: TWA 10 mg/m3; TWA 5 mg/m3
Stability:Stability
Cosmetics Ingredients FunctionsABRASIVE
InChIKeyHBMJWWWQQXIZIP-UHFFFAOYSA-N
Knoop Microhardness3000, at 25°C
Shear Modulus180 GPa, Calculated
Modulus of Elasticity459 - 476 GPa
Poissons Ratio0.14, sintered
NIST Chemistry ReferenceSilicon monocarbide(409-21-2)
IARC2A (Vol. 111) 2017
EPA Substance Registry SystemSilicon carbide (409-21-2)


Safety Information


Hazard CodesXi
Risk Statements36/37/38
Safety Statements26-36
OEBB
OELTWA: 10 mg/m3 (total)
WGK Germany3
RTECSVW0450000
TSCAYes
HS Code28492000
Hazardous Substances Data409-21-2(Hazardous Substances Data)


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