Supplier Data - Sapphire Single Crystal (Alumina 99.9%) - (Goodfellow)

Material: Supplier Data - Sapphire Single Crystal (Alumina 99.9%) - (Goodfellow)
Composition: Al2O3
Property Minimum Value (S.I.) Maximum Value (S.I.) Units (S.I.) Minimum Value (Imp.) Maximum Value (Imp.) Units (Imp.)
Atomic Volume (average) 0.005 0.0058 m3/kmol 305.119 353.938 in3/kmol
Density 3.93 4.01 Mg/m3 245.342 250.336 lb/ft3
Energy Content 1600 2000 MJ/kg 173342 216677 kcal/lb
Bulk Modulus 293 316 GPa 42.496 45.8319 106 psi
Compressive Strength 2100 2426 MPa 304.579 351.862 ksi
Ductility 0 0 0 0 NULL
Elastic Limit 403 423 MPa 58.4502 61.351 ksi
Endurance Limit 334.4 390.2 MPa 48.5006 56.5937 ksi
Fracture Toughness 1 1.5 MPa.m1/2 0.910047 1.36507 ksi.in1/2
Hardness 18000 22000 MPa 2610.68 3190.83 ksi
Loss Coefficient 5e-006 1e-005 5e-006 1e-005 NULL
Modulus of Rupture 462 655 MPa 67.0074 94.9997 ksi
Poisson's Ratio 0.28 0.33 0.28 0.33 NULL
Shear Modulus 131 142 GPa 18.9999 20.5954 106 psi
Tensile Strength 403 423 MPa 58.4502 61.351 ksi
Young's Modulus 343 370 GPa 49.7479 53.6639 106 psi
Glass Temperature K °F
Latent Heat of Fusion 840 950 kJ/kg 361.133 408.424 BTU/lb
Maximum Service Temperature 2073 2223 K 3271.73 3541.73 °F
Melting Point 2238 2338 K 3568.73 3748.73 °F
Minimum Service Temperature 0 K -459.67 °F
Specific Heat 648 750 J/kg.K 0.50146 0.580394 BTU/lb.F
Thermal Conductivity 34.6 40 W/m.K 64.7724 74.8813 BTU.ft/h.ft2.F
Thermal Expansion 4.5 5.8 10-6/K 8.1 10.44 10-6/°F
Breakdown Potential 48 51 MV/m 1219.2 1295.4 V/mil
Dielectric Constant 7.5 11.5 7.5 11.5 NULL
Resistivity 3.16e+021 3.16e+022 10-8 ohm.m 3.16e+021 3.16e+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 5
Strong Alkalis 5
UV 5
Wear 5
Weak Acid 5
Weak Alkalis 5