Ceramic Materials Properties

Mechanical and Electrical Properties of Du-Co Ceramic Materials
Property/UnitSteatiteForsteriteAlumina
96% AL203
CordieriteMagnesium OxideAluminum
Silicate
Material GradeDC-9
L-3
DC-10
L-3
DC-16
L-3
DC-144
L-5
DC-200
L-5
DC-265
L-6
DC-65DC-187DC-142
Water Absorption (%)Impervious
0.0-0.02
Semi-porous
1.0-3.0
Impervious
0.0-0.2
Impervious
0.0-0.2
Impervious
0.0-0.2
Impervious
0.0
Porous
1.0-5.0
Porous
15-20
Porous
15-20
Density (lbs/in3)0.0940.0900.0940.0980.1010.1340.076.076-.0900.072
Specific Gravity (g/cc)2.62.52.62.72.83.72.12.1-2.52.0
ColorOff-WhiteOff-WhiteOff-WhiteOff-WhiteCreamWhiteOff-WhiteOff-WhiteOff-White
Thermal Conductivity (k) Watts/(Meter)(C°)3.4
(0.008)
3.4
(0.008)
3.4
(0.008)
3.4
(0.008)
3.8
(0.009)
18.0
(0.045)
3.4
(0.008)
—-
—-
—-
—-
Hardness (Mohs’ Scale)7.57.57.57.57.59.07.5—-—-
Flexural Strength
(1000 Pounds per Sq. In.)
1817.518202060141.53.5
Compressive Strength (1000 Pounds per Sq. In.)8075809085400702.56
Tensile Strength (1000 Pounds per Sq. In.)8.588.599257—-—-
Coefficient of Thermal Expansion Per °C (20° – 650°C)8.0×10-68.2×10-6>8.39×10-68.4×10-69.9×10-67.9×10-62.9×10-6—-—-
Resistance to Impact (Inch – Pounds)54.755.35.174.5—-—-
Safe Operating Temperature
°C
°F
1000
1832
1000
1832
1000
1832
1000
1832
1000
1832
1550
2822
1100
2012
—-
—-
—-
—-
Dielectric Strength (Volts per mil)230220230240250230180—-—-
Te Value
°C
°F
850
1562
800
1472
850
1562
900
1652
1020
1868
840
1544
750
1382
1100
2012
800
1472
Dielectric Constant (at 1 Megacycle/Sec.)5.55.95.56.26.49.36.0—-—-
Power Factor (at 1 megacycle/Sec.)0.0050.00460.0050.00120.00110.00030.008—-—-
Loss Factor (at 1 Megacycle/Sec.)0.0280.0270.0280.0070.0070.00280.048—-—-