skip to content

Solutions-In-Plastics.info » Products » Technical ceramics » Comparison between properties
Comparison between properties
Comparison between ceramic material properties datasheet (91kB)
| Oxides | Carbide | Nitride |
---|
| Al 2O 3 | ZrO2/Y2O3 | ZrO2/MgO | MgO | SiC | Si3N4 Reaction sintered | Si3N4 Hot pressed | ALN |
---|
Physical properties |
|
|
|
|
|
|
|
|
---|
Density (g/cm3) | 3,9 | 5,9 | 5,75 | 3,58 | 3,2 | 3,27 | 3,29 | 3,26 |
---|
Molecular weight (g/mole) | 102 | - | - | 40,4 | 40,1 | 140 | 140 | 41 |
---|
Maximum service temperature air (°C) | 1700- 1800 | 1500 | 1000 | 2200 | 1500 | 1200- 1500 | 1100- 1600 | 1000- 1800 |
---|
Mechanical properties |
|
|
|
|
|
|
|
|
---|
Hardness (Mohs) | 9 | - | - | 5,5 | 9 | - | - | 7 |
---|
Modulus of elasticity (GPa) | 300-400 | 200 | 200 | 250-300 | 420 | 170-220 | 280-310 | 318 |
---|
Poisson's ratio | 0,25 | - | - | 0,18 | 0,14 | 0,25-0,26 | 0,27 | 0,25 |
---|
Fracture toughness (MPa.m1/2) | 2-3 | 7-13 | 6-10 | - | 2,5-3,5 | 3,5-5 | 6,1 | 4,5 |
---|
Electrical properties |
|
|
|
|
|
|
|
|
---|
Dielectric constant | 9-10 | - | - | 9-10 | - | 10 | 10 | 9,2 |
---|
Electrical resistivity at 20°C (Ohm.cm) | >10 14 | 10 13-10 14 | >10 10 | - | 10 2-10 6 | >10 7 | 10 12- 10 15 | >10 14 |
---|
Dielectric strength (kV/mm) | 10-20 | 9 | 2-10 | - | - | - | - | 15 |
---|
Thermal properties |
|
|
|
|
|
|
|
|
---|
Specific heat (J/K/kg) | 900 | 400-500 | 420 | 870-880 | 750 | 690 | 680-800 | 800 |
---|
Thermal conductivity (W/m/K) at 20°C | 26-35 | 2,2-3,2 | 1,5-2,5 | 40-50 | 63-155 | 9-30 | 15-43 | 180 |
---|
Coefficient of thermal expansion ( 10-6) from 20 to 1000°C | 8-9 | 10-11 | 5-16 | 10-13 | 4-5 | 3 | 3,3 | 4,4-5,3 |
---|
Melting point (°C) | 2050 | 2590 | - | 2800 | 2500 | 1900 | 1900 | 2200 |
---|
This is a printed version of Solutions-In-Plastics.info of ERIKS nv.
© ERIKS nv, 2021.