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Goodfellow Ruby, Al2O3

Category Ceramic , Oxide , Aluminum Oxide
Manufacturer Goodfellow
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF Goodfellow Ruby, Al2O3.pdf
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Material Notes:
Ruby exhibits identical properties to those of sapphire. Small amounts of impurities, especially chromium oxide, give ruby a red coloration. Useful optical range from 150 - 5500 nm.Information provided by Goodfellow.
Physical Properties Metric English Comments
Density 3.98 g/cc
0.144 lb/in³
Water Absorption 0.00 %
0.00 %
Porosity 0.00 %
0.00 %
apparent
Mechanical Properties Metric English Comments
Knoop Microhardness 2000
2000
kg(f)/mm²
Vickers Microhardness 2500 - 3000
2500 - 3000
kg(f)/mm²
Tensile Strength at Break 250 - 400 MPa
36300 - 58000 psi
Tensile Modulus 350 - 390 GPa
50800 - 56600 ksi
Compressive Strength 2100 MPa
305000 psi
Thermal Properties Metric English Comments
CTE, linear 5.80 µm/m-°C

@Temperature 20.0 - 1000 °C
3.22 µin/in-°F

@Temperature 68.0 - 1830 °F
Specific Heat Capacity 0.750 J/g-°C
0.179 BTU/lb-°F
Thermal Conductivity 35.0 - 40.0 W/m-K
243 - 278 BTU-in/hr-ft²-°F
Melting Point 2050 °C
3720 °F
Maximum Service Temperature, Air 1800 - 1950 °C
3270 - 3540 °F
Continuous
Electrical Properties Metric English Comments
Electrical Resistivity 1.00e+14 ohm-cm

@Temperature 25.0 °C
1.00e+14 ohm-cm

@Temperature 77.0 °F
Dielectric Constant 7.5 - 11.5
7.5 - 11.5
Dielectric Strength 15.0 - 50.0 kV/mm
381 - 1270 kV/in
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