Good Thermal Mullite Ceramic Tubes High Shock Resistance Refractory Tube Screwed
Refractory Good thermal shock resistance corundum mullite ceramic screwed tube
Mullite Ceramics
Mullite ceramics is a general term for a class of ceramics in which the main crystal phase is mullite (3Al2O3·2SiO2). If the mullite porcelain without glass phase is prepared from synthetic ultra-fine high-purity mullite powder, it is also called new mullite ceramic, that is, high-purity mullite ceramic.
Mechanical properties
The mechanical properties of the high-purity mullite ceramic sintered body are determined by the ratio of Al2O3/SiO2 and the microstructure, especially the mullite ceramics with an Al2O3 content of 68%. The flexural strength at 1300 °C is 570 MPa, and the fracture toughness Kic is up to 5.7MPa.Nm, which is 1.6 times higher than normal temperature.
|
Item |
Test Condition |
Unit&Symbol |
Cordierite ceramics |
|
The main chemical ingredient |
|
|
MgO, Al2O3,SiO2 |
|
Bulk Density |
|
gm/cc |
2.6 |
|
Maximum Use Temperature |
|
|
1400℃ |
|
Hardness |
|
HV |
800 |
|
Bending Strength |
20℃ |
Kgf/cm2 |
900 |
|
Compressive Strength |
20℃ |
Kgf/cm2 |
3500 |
|
Fracture Toughness |
K(I c) |
Mpa m1/2 |
- |
|
Thermal expansion |
|
1X 10-6/℃ |
≤2.0 |
|
Thermal conductivity |
25℃-30℃ |
W/m.k |
1.3 |
|
Thermal Shock Resistance |
Tc |
℃ |
250 |
|
Dielectricity constant |
1MHz.25℃ |
|
6 |
|
Dielectric strength |
|
ac-kV/mm (ac V/mil) |
10 |
|
Volume Resistivity |
20℃ |
ohm-cm |
> 1012 |
Get in Touch
Have questions about our products or want to discuss a custom order? Our team is ready to help you.