Property | Units | |||||
Al2O3 Content | % | 95 | 99 | 99.7 | ||
Density | g / cm3 | 3.70 | 3.90 | 3.92 | ||
Color | - | White | White | Ivory | ||
Compressive Strength @ 25 C | Mpa | 2229 | 2091 | 2350 | ||
Tensile Strength @ 25 C | MPa | 200 | 200 | 252 | ||
Flexural Strength @ 25 C | MPa | 331 | 276 | 320 | ||
Elastic Modulus @ 25 C | GPa | 290 | 331 | 380 | ||
Hardness : Knoop Rockwell | (Gpa) Kg/mm2 R45N | (11.7) 1196 79 | (12.5) 1276 77 | (15) 1510 90 | ||
Thermal Conductivity @ 25 C | W / m-Deg K | 20.8 | 28.1 | 31.6 | ||
Coefficient of Thermal Expansion @ 25-1000 C | 1 X 10-6 / Deg C | 7.9 | 8.5 | 8.0 | ||
Specific Heat @ 25 C | cal / g / Deg C | .184 | .184 | .180 | ||
Maximum Working Temp. | Deg C | 1650 | 1650 | 1700 | ||
VolumeResitivity @25C @700 C | ohm-cm ohm-cm | 1 X 10-13 1 X 10-8 | 1X 10-13 2.2 X 10-9 | 1 X 10-13 6 x 10-7 | ||
Dielectric Strength (@Thickness) 100Mils | ac volts per mil | 350 | 340 | 330 | ||
Dielectric Constant 1Mhz @25C | e' / eo | 8.6 | 9.4 | 10.0 | ||
Dissipation Factor 1 Mhz @25C | Tan Delta | .0004 | .0003 | .0002 | ||
