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Structural Components Specialty Ceramics Division 453 West McConkey Street Shreve, Ohio 44676 (330) 567-2145 Fax: (330) 567-2260 |
| Properties |
Units |
Aluminum Oxide |
|||||
| Nominal Aluminum Oxide Content | Percent Alumina |
87 |
92 |
94 |
94 |
96 |
99.5 |
| Density (Apparent Specific Gravity) | gm/cc |
3.48 |
3.57 |
3.67 |
3.7 |
3.75 |
3.90-3.94 |
| Phases | Major |
alpha Al203 |
alpha Al203 |
alpha Al203 |
alpha Al203 |
alpha Al203 |
alpha Al203 |
| Hardness HV5 (KHN5) | kg/mm2 |
985 |
1050 |
1120 |
1100 |
1255 |
1530 |
| Flexural Strength (3 Point) | kpsi |
42 |
46.5 |
47 |
50 |
50 |
55 |
| Weibull Modulus | — |
6 |
11 |
9 |
16 |
12 |
10 |
| Tensile Strength (ACMA Test #4) | kpsi |
18.0 |
18.5 |
24.0 |
28.5 |
22.0 |
31.2 |
| Compressive Strength (ASTMC-733-74) | kpsi |
235 |
280 |
350 |
350 |
325 |
260 |
| Fracture Toughness, Kic (Indentation) | MPa m 1/2 |
3.9 |
— |
3.9 |
4.5 |
3.7 |
4.3 |
| Young' s Modulus (Ultrasonic) | psi |
3.60E+07 |
4.25E+07 |
4.00E+07 |
4.61E+07 |
4.50E+07 |
4.80E+07 |
| Shear Modulus (Ultrasonic) | psi |
1.50E+07 |
1.75E+07 |
1.65E+07 |
1.90E+07 |
1.80E+07 |
1.90E+07 |
| Poisson's Ratio (ASTMC-623) |
0.20 |
0.21 |
0.21 |
0.21 |
0.25 |
0.26 |
|
| Coefficient of
Linear Thermal Expansion (x per degree C) (ASTM-32) |
25-200C |
5.10E-06 |
5.10E-06 |
3.60E-06 |
5.20E-06 |
5.40E-06 |
5.10E-06 |
| Thermal Conductivity W/m/degree K | 25C |
21.0 |
17.0 |
28.1 |
20.0 |
28.5 |
35.4 |
| Dielectric Strength (ASTMD-149 6.35mm) | V/mil |
— |
211 |
204 |
212 |
207 |
215 |
| Dielectric Constant at 25 degrees C (ASTMD-116) | 1KHz |
— |
— |
— |
— |
— |
— |
| Dissipation Factor at 25 degrees C (ASTMD-116) | 1KHz |
— |
— |
— |
— |
— |
— |
| Volume Resistivity
Ohm-cm (ASTMC-257) |
100C |
— |
— |
9.50E+14 |
— |
1.80E+14 |
1.50E+15 |
| Thermal Shock (Hasselman) | Degrees C |
200 |
200 |
200 |
200 |
200 |
200 |
| Porosity (Helium Mass Spectrometer) | Gas |
Gas |
Gas |
Gas |
Gas |
Gas |
|
| Water Absorption | None |
None |
None |
None |
None |
None |
|
| Color | Off White |
White |
White |
Pink |
White |
Off White | |
| Properties |
Units |
Zirconia |
Silicon Nitride |
Tungsten |
|
| Nominal Aluminum Oxide Content | Percent Alumina |
ZTA |
TZP |
Si3N4 |
WC-Co10 |
| Density (Apparent Specific Gravity) | gm/cc |
4.48 |
6.05 |
3.2 |
14.63 |
| Phases | Major |
alpha Al203 |
t-ZrO2 |
— |
— |
| Hardness HV5 (KHN5) | kg/mm2 |
1650 |
1150 |
1180 |
1540 |
| Flexural Strength (3 Point) | kpsi |
110 |
120 |
100 |
450* |
| Weibull Modulus | — |
11 |
19 |
18 |
— |
| Tensile Strength (ACMA Test #4) | kpsi |
70 |
85 |
— |
— |
| Compressive Strength (ASTMC-733-74) | kpsi |
425 |
425 |
— |
— |
| Fracture Toughness, Kic (Indentation) | MPa m 1/2 |
6.5 |
12.0 |
5.2 |
— |
| Young' s Modulus (Ultrasonic) | psi |
4.03E+007 |
2.50E+007 |
4.00E+007 |
9.00E+007 |
| Shear Modulus (Ultrasonic) | psi |
1.65E+07 |
1.105E+07 |
— |
— |
| Poisson's Ratio (ASTMC-623) | 0.22 |
0.33 |
— |
— |
|
| Coefficient of
Linear Thermal Expansion (x per degree C) (ASTM-32) |
25-200C |
7.80E-06 |
5.90E-06 |
— |
— |
| Thermal Conductivity W/m/degree K | 25C |
15.8 |
2.9 |
— |
— |
| Dielectric Strength
(ASTMD-149 6.35mm) |
V/mil |
— |
— |
— |
— |
| Dielectric Constant at 25 degrees C (ASTMD-116) | 1KHz |
— |
— |
— |
— |
| Dissipation Factor at 25 degrees C (ASTMD-116) | 1KHz |
— |
— |
— |
— |
| Volume Resistivity Ohm-cm (ASTMD-257) | 100C |
— |
— |
— |
— |
| Thermal Shock (Hasselman) | Degrees C |
250 |
320 |
— |
— |
| Porosity (Helium Mass Spectrometer) | Gas |
Gas |
Gas |
Gas |
|
| Water Absorption | None |
None |
None |
None |
|
| Color | White |
Gold |
Gray |
Gray |
|
*Estimated
|
|
Return to Advanced
Structural Components Specialty Ceramics Division 453 West McConkey Street Shreve, Ohio 44676 (330) 567-2145 Fax: (330) 567-2260 |