Mullite - An Introduction

Material: Mullite - An Introduction
Composition: 3(Al2O3) - 2(SiO2)
Property Minimum Value (S.I.) Maximum Value (S.I.) Units (S.I.) Minimum Value (Imp.) Maximum Value (Imp.) Units (Imp.)
Atomic Volume (average) 0.0131 0.0139 m3/kmol 799.411 848.23 in3/kmol
Density 2.7 3.1 Mg/m3 168.556 193.527 lb/ft3
Energy Content 80 100 MJ/kg 8667.09 10833.9 kcal/lb
Bulk Modulus 58.3 100 GPa 8.45569 14.5038 106 psi
Compressive Strength 550 1320 MPa 79.7708 191.45 ksi
Ductility 0.00058 0.00113 0.00058 0.00113 NULL
Elastic Limit 55 132 MPa 7.97708 19.145 ksi
Endurance Limit 50 99 MPa 7.25188 14.3587 ksi
Fracture Toughness 2.1 4 MPa.m1/2 1.9111 3.64019 ksi.in1/2
Hardness 1793 2684 MPa 260.053 389.281 ksi
Loss Coefficient 1e-005 0.001 1e-005 0.001 NULL
Modulus of Rupture 132 250 MPa 19.145 36.2594 ksi
Poisson's Ratio 0.23 0.26 0.23 0.26 NULL
Shear Modulus 37 59 GPa 5.36639 8.55722 106 psi
Tensile Strength 55 132 MPa 7.97708 19.145 ksi
Young's Modulus 91 220 GPa 13.1984 31.9083 106 psi
Glass Temperature K °F
Latent Heat of Fusion 340 1200 kJ/kg 146.173 515.905 BTU/lb
Maximum Service Temperature 1800 2000 K 2780.33 3140.33 °F
Melting Point 2081 2165 K 3286.13 3437.33 °F
Minimum Service Temperature 0 0 K -459.67 -459.67 °F
Specific Heat 314 1050 J/kg.K 0.242991 0.812551 BTU/lb.F
Thermal Conductivity 1.9 6 W/m.K 3.55686 11.2322 BTU.ft/h.ft2.F
Thermal Expansion 3.5 5.6 10-6/K 6.3 10.08 10-6/°F
Breakdown Potential 10 12 MV/m 254 304.8 V/mil
Dielectric Constant 6.5 8 6.5 8 NULL
Resistivity 1e+019 1e+022 10-8 ohm.m 1e+019 1e+022 10-8 ohm.m
Environmental Properties
  Resistance Factors
1=Poor 5=Excellent
Flammability 5
Fresh Water 5
Organic Solvents 5
Oxidation at 500C 5
Sea Water 5
Strong Acid 4
Strong Alkalis 4
UV 5
Wear 5
Weak Acid 5
Weak Alkalis 5

This data is provided subject to AZoM.com's terms and conditions. Data reproduced with permission of Granta Design Limited www.grantadesign.com and Ceram Research Limited www.ceram.co.uk

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