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Elmet Technologies

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Goodfellow Ruby, Al2O3
Categories: Ceramic; Oxide; Aluminum Oxide

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.

Key Words: Al2O3, Alumina, Corundum
Vendors: No vendors are listed for this material. Please click here if you are a supplier and would like information on how to add your listing to this material.
 
Physical PropertiesOriginal ValueComments
Density 3.98 g/cc
Water Absorption 0.00 %
Porosity 0.00 %apparent
 
Mechanical PropertiesOriginal ValueComments
Knoop Microhardness 2000kg(f)/mm²
Vickers Microhardness 2500 - 3000kg(f)/mm²
Tensile Strength at Break 250 - 400 MPa
Tensile Modulus 350 - 390 GPa
Compressive Strength 2100 MPa
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity 1.00e+14 ohm-cm
@Temperature 25.0 °C
Dielectric Constant 7.5 - 11.5
Dielectric Strength 15.0 - 50.0 kV/mm
 
Thermal PropertiesOriginal ValueComments
CTE, linear 5.80 µm/m-°C
@Temperature 20.0 - 1000 °C
Specific Heat Capacity 0.750 J/g-°C
Thermal Conductivity 35.0 - 40.0 W/m-K
Melting Point 2050 °C
Maximum Service Temperature, Air 1800 - 1950 °CContinuous

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