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Silicon Nitride

Silicon Nitride

Material: Si3N4
ROHS & REACH compliant

Physical properties composition Si3N4  86.5% 
    Al2O3Y2O3 12.5%   others 1%
  bulk density 3.25 g/cm3
  color black
  grain ultrafine
     
Thermal properties max use temp non load 1000 C
  specific heat          800  j/kg ∙ K
  conductivity 30 W/mK  (at 20C)
  expansion 3.4 10-6/K
     
Mechanical properties hardness Vickers 1500 kg/mm2
  modulus of rupture 1000  MPa
  youngs modulus 300 GPa
  fracture toughness 6 MPa ∙ m1/2
  compressive strength 3000 MPa
     
Chemical properties acids and alkalis attack good resistance