Mechanical and Electrical Properties of Du-Co Ceramic Materials | |||||||||
Property/Unit | Steatite | Forsterite | Alumina 96% AL203 | Cordierite | Magnesium Oxide | Aluminum Silicate | |||
Material Grade | DC-9 L-3 | DC-10 L-3 | DC-16 L-3 | DC-144 L-5 | DC-200 L-5 | DC-265 L-6 | DC-65 | DC-187 | DC-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) | 0.094 | 0.090 | 0.094 | 0.098 | 0.101 | 0.134 | 0.076 | .076-.090 | 0.072 |
Specific Gravity (g/cc) | 2.6 | 2.5 | 2.6 | 2.7 | 2.8 | 3.7 | 2.1 | 2.1-2.5 | 2.0 |
Color | Off-White | Off-White | Off-White | Off-White | Cream | White | Off-White | Off-White | Off-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) | 7.5 | 7.5 | 7.5 | 7.5 | 7.5 | 9.0 | 7.5 | —- | —- |
Flexural Strength (1000 Pounds per Sq. In.) | 18 | 17.5 | 18 | 20 | 20 | 60 | 14 | 1.5 | 3.5 |
Compressive Strength (1000 Pounds per Sq. In.) | 80 | 75 | 80 | 90 | 85 | 400 | 70 | 2.5 | 6 |
Tensile Strength (1000 Pounds per Sq. In.) | 8.5 | 8 | 8.5 | 9 | 9 | 25 | 7 | —- | —- |
Coefficient of Thermal Expansion Per °C (20° – 650°C) | 8.0×10-6 | 8.2×10-6> | 8.39×10-6 | 8.4×10-6 | 9.9×10-6 | 7.9×10-6 | 2.9×10-6 | —- | —- |
Resistance to Impact (Inch – Pounds) | 5 | 4.7 | 5 | 5.3 | 5.1 | 7 | 4.5 | —- | —- |
Safe Operating Temperature °C °F | 1000 1832 | 1000 1832 | 1000 1832 | 1000 1832 | 1000 1832 | 1550 2822 | 1100 2012 | —- —- | —- —- |
Dielectric Strength (Volts per mil) | 230 | 220 | 230 | 240 | 250 | 230 | 180 | —- | —- |
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.) | 5.5 | 5.9 | 5.5 | 6.2 | 6.4 | 9.3 | 6.0 | —- | —- |
Power Factor (at 1 megacycle/Sec.) | 0.005 | 0.0046 | 0.005 | 0.0012 | 0.0011 | 0.0003 | 0.008 | —- | —- |
Loss Factor (at 1 Megacycle/Sec.) | 0.028 | 0.027 | 0.028 | 0.007 | 0.007 | 0.0028 | 0.048 | —- | —- |