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Elmet Technologies

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CoorsTek Mullite, S2
Categories: Ceramic; Oxide; Aluminum Oxide

Material Notes: Thermal Shock Delta Tc = 300°C - Thermal shock tests are performed by quenching samples in water from different elevated temperatures. Delta Tc is the change in temperature which results in a sharp decrease in the flexural strength of the sample.

Data Provided by the manufacturer, Coors Ceramics Co.

Key Words: Coors Mullite, 3Al2O3.2SiO2, S2
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Physical PropertiesOriginal ValueComments
Density 2.80 g/ccASTM C20
Water Absorption 0.00 %ASTM C373
Particle Size 10 µmAverage Crystal Size - Thin Section Test
 
Mechanical PropertiesOriginal ValueComments
Knoop Microhardness 7.41000 g load
Hardness, Rockwell 45 N 70GPa
Modulus of Elasticity 150 GPaASTM C848
Flexural Strength 170 MPaASTM F417
Compressive Strength 550 MPaASTM C773
Poissons Ratio 0.25ASTM C848
Fracture Toughness 2.00 MPa-m½Notched Beam
Shear Modulus 60.0 GPaCalculated
 
Electrical PropertiesOriginal ValueComments
Electrical Resistivity >= 1.00e+13 ohm-cmASTM D1829
 300000 ohm-cm
@Temperature 1000 °C
ASTM D1829
 5.00e+12 ohm-cm
@Temperature 500 °C
ASTM D1829
Dielectric Constant 6.0
@Frequency 1e+6 Hz
Dielectric Strength 9.80 kV/mmac; ASTM D116
Dielectric Loss Index 0.0020
@Frequency 1e+6 Hz
ASTM D2520
 
Thermal PropertiesOriginal ValueComments
CTE, linear 5.30 µm/m-°C
@Temperature 25.0 - 1000 °C
ASTM C372
Specific Heat Capacity 0.950 J/g-°CASTM E1269
Thermal Conductivity 3.50 W/m-KASTM C408
Maximum Service Temperature, Air 1700 °CNo Load
 
Descriptive Properties
ColorTan

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CM1A / 1495

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