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CoorsTek AD-998 Alumina(nom. 99.8% Al2O3)

Category Ceramic , Oxide , Aluminum Oxide
Manufacturer CoorsTek
Trade Name
Port Shanghai port,China
Trade Terms FOB, CFR, CIF
Payment Terms L/C, T/T, Western Union
Download PDF CoorsTek AD-998 Alumina(nom. 99.8% Al2O3).pdf
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Material Notes:
Thermal Shock Delta Tc = 200°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.Corrosion: Although all Coors Ceramics are highly resistant to chemical attack, Coors recommends obtaining specific application data from Coors before design finalization.Data Provided by the manufacturer, Coors Ceramics Co.
Physical Properties Metric English Comments
Density 3.92 g/cc
0.142 lb/in³
ASTM C20
Water Absorption 0.00 %
0.00 %
ASTM C373
Particle Size 6.0 µm
6.0 µm
Average Crystal Size - Thin Section Test
Mechanical Properties Metric English Comments
Knoop Microhardness 14.1
14.1
1000 g load
Hardness, Rockwell 45 N 83
83
GPa
Tensile Strength, Ultimate 248 MPa
36000 psi
ACMA Test #4
Modulus of Elasticity 370 GPa
53700 ksi
ASTM C848
Flexural Strength 375 MPa
54400 psi
ASTM F417
Compressive Strength 2500 MPa
363000 psi
ASTM C773
Poissons Ratio 0.22
0.22
ASTM C848
Fracture Toughness 4.00 - 5.00 MPa-m½
3.64 - 4.55 ksi-in½
Shear Modulus 152 GPa
22000 ksi
Calculated
Thermal Properties Metric English Comments
CTE, linear 8.20 µm/m-°C

@Temperature 25.0 - 1000 °C
4.56 µin/in-°F

@Temperature 77.0 - 1830 °F
ASTM C372
Specific Heat Capacity 0.880 J/g-°C
0.210 BTU/lb-°F
ASTM E1269
Thermal Conductivity 30.0 W/m-K
208 BTU-in/hr-ft²-°F
ASTM C408
Maximum Service Temperature, Air 1750 °C
3180 °F
No Load
Electrical Properties Metric English Comments
Electrical Resistivity >= 1.00e+14 ohm-cm
>= 1.00e+14 ohm-cm
ASTM D1829
5.00e+7 ohm-cm

@Temperature 1000 °C
5.00e+7 ohm-cm

@Temperature 1830 °F
ASTM D1829
2.00e+10 ohm-cm

@Temperature 500 °C
2.00e+10 ohm-cm

@Temperature 932 °F
ASTM D1829
Dielectric Constant 9.8

@Frequency 1e+6 Hz
9.8

@Frequency 1e+6 Hz
Dielectric Strength 8.70 kV/mm
221 kV/in
ac; ASTM D116
Dielectric Loss Index 0.0010
0.0010
at 25°C, 1 MHz; ASTM D2520
Descriptive Properties Value Comments
Color Ivory
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