
Steatite and cordieritte ceramics
Steatite ceramics comstruction insulating material
Cordieritte ceramics electrical applications, power resistors, bodls of infra-red- radiators, catalyst carriers of engines exhausts
Table 2: Specifikation/Properties of dolomitic ceramics.
|
|
|
Material |
|
|
|
|
STEATIT |
CORDIERIT |
Qualification based on ČSN EN 60672 |
|
|
C 221 |
C 410 |
Trade description |
|
|
FR 59/8 |
TH 7/7 R12 BM |
|
Symbol |
Units |
|
|
Open porosity |
pa |
[%] |
0 |
0.5 |
Bulk density |
ρa |
[g.cm-3] |
2.7 |
2.1 |
Modulus of elasticity |
E |
[GPa] |
110 |
- |
Flexural strength |
σ |
[MPa] |
140 |
60 |
Mean coefficient of linear thermal expansion |
α30-600 |
[10-6 K-1] |
7-9 |
2-4 |
Thermal conductivity |
λ30-100 |
[Wm-1K-1] |
2-3 |
1.2-2.5 |
Resistance to thermal shock |
ΔT |
[K] |
100 |
250 |
Relative permittivity |
εr |
- |
6 |
5 |
Volume resistivity in terms of temperature |
ρv,30 |
[Ω.m] |
1011 |
1010 |
ρv,200 |
[Ω.m] |
109 |
106 |
|
Colour |
|
|
beige |
grey |
Contact
Hradec Králové
50003
CZECH REPUBLIC +420 495 407 549 mrufert@alumina-systems.com