Property |
Units |
Test |
Value |
Density |
gm/cc |
ASTM-C20 |
3.72 |
Crystal Size |
Microns |
Thin-Section |
6 |
Water Absorption |
% |
ASTM-373 |
0 |
Gas Permeability |
|
|
0 |
Flexural Strength (MOR), 20 degrees C |
-- |
-- |
358 (52) |
Elastic Modulus, 20 degrees C |
GPa (psi x 106) |
ASTM-F417 |
303 (44) |
Poisson's Ratio, 20 degrees C |
-- |
ASTM-C848 |
0.21 |
Compressive Strenght |
MPa(psi x 103) |
ASTM-C773 |
2068 (300) |
Hardness |
GPa(kg/mm2) |
KNOOP 1000 gm |
11.5 (1175) |
|
|
Rockwell 45 N |
78 |
Tensile Strength, 25 degrees C |
MPa (psi x 103) |
ACMA TEST #4 |
221 (32) |
Fracture Toughness K(Ic) |
Mpa m1/2 |
NOTCHED BEAM |
4-5 |
Thermal Conductivity, 20 degrees C |
Wm degrees K |
ASTM-C408 |
24.7 |
Coefficient of Thermal Expansion, 25-1000 degrees C |
1 x 10-6/degrees C |
ASTM-C372 |
8.2 |
Specific Heat, 100 degrees C |
J/kg*K |
ASTM-E1269 |
880 |
Thermal Shock Resistance, (delta)Tc |
degrees C |
NOTE 3 |
250 |
Maximum Use Temperature |
degrees C |
NO-LOAD COND. |
1700 |
Dielectric Stength |
ac-kV/mm (acV/mil) |
ASTM-D116 |
8.3 (210) |
Dielectric Constant, 1MHz |
25 degrees C |
ASTM-D150 |
9.0 |
Dielectric Loss (tan delta) 1MHz |
25 degrees C |
ASTM-D2520 |
0.0002 |
Volume Resistivity |
25 degrees C |
ohm-cm |
ASTM-D1829 |
>1014 |
|
500 degrees C |
ohm-cm |
ASTM-D1829 |
4 x 109 |
|
1000 degrees C |
ohm-cm |
ASTM-D1829 |
1 x 106 |