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CeramTec Rubalit® 708 Alumina, 96%
Categories:
Ceramic
;
Oxide
;
Aluminum Oxide
Material Notes:
Based on 96% aluminum oxide, Rubalit® 708 was developed specifically for making heavy-duty resistors and miniature metal layer resistors. Because of its outstanding strength, this same material is also used for precision wire-wound resistors.
Key Words:
Al2O3, aluminum oxide
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Physical Properties
Original Value
Comments
Density
3.75
g/cc
Water Absorption
0.00 %
ASTM-C373
Mechanical Properties
Original Value
Comments
Hardness, Rockwell 45 N
78
ASTM-E18
Flexural Strength
420
MPa
Bending Strength; ASTM-F417
Electrical Properties
Original Value
Comments
Volume Resistivity
1.00e+8
ohm-cm
@Temperature 600 °C
ASTM-D1829
1.00e+11
ohm-cm
@Temperature 400 °C
ASTM-D1829
1.00e+12
ohm-cm
@Temperature 200 °C
ASTM-D257
Dielectric Strength
>=
10.0
kV/mm
ASTM-D149
Thermal Properties
Original Value
Comments
CTE, linear
4.40
µm/m-°C
@Temperature 20.0 - 100 °C
ASTM-C372
6.30
µm/m-°C
@Temperature 20.0 - 300 °C
ASTM-C372
7.30
µm/m-°C
@Temperature 20.0 - 600 °C
ASTM-C372
8.00
µm/m-°C
@Temperature 20.0 - 1000 °C
ASTM-C372
Thermal Conductivity
24.0
W/m-K
ASTM-C408
Maximum Service Temperature, Air
1400
°C
Component Elements Properties
Original Value
Comments
Al2O3
96 %
Descriptive Properties
Color
White
Ra = Arithmetic Mean Roughness Value (µm)
0.25-0.35
Te Value (°C)
900
Some of the values displayed above may have been converted from their original units and/or rounded in order to display the information in a consistent format. Users requiring more precise data for scientific or engineering calculations can click on the property value to see the original value as well as raw conversions to equivalent units. We advise that you only use the original value or one of its raw conversions in your calculations to minimize rounding error. We also ask that you refer to MatWeb's
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CeramTec 614/698 Alumina, 96%
CeramTec Rubalit® 708S Alumina, 96%
CeramTec 433 Alumina, 99.9%
CCERA957 / 107557
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