| Material in accordance with EC 672/DIN VDE 0335 (Formerly DIN 40685) |
Unit |
Porcelain
KER 110 |
Steatite
C221 |
Zicon/Mulite
Corderite
Porous
for special
refractory
application
C 520 |
Vitreous
Cordierite
Zircon/Mulite
based
Specially
use for
HR.
ROUND
Body C520
|
H-AT
C 610
Alumina
75% |
Alumina
85% |
Alumina
98% |
 |
| Open Porosity (water Absorption) |
Vol.% |
0 |
0 |
<20 |
N (0.0%) |
0 |
0 |
0 |
| Bulk Density |
g/mc2 |
2.45 |
2.7 |
>1.9 |
Above 2.5 |
2.8 |
3.4 |
3.75 |
| Compressive Strength |
N/mm2 |
450 |
900 |
200 |
600 |
700 |
1450 |
2200 |
| Pezura Strength |
N/mm2 |
40 |
140 |
<30 |
|
150 |
280 |
300 |
| Modules of Elasticity |
N/mm2 |
|
1.0 X 102 |
40 X 102 |
|
150X102 |
170X102 |
190X102 |
| Coefficient of near thermal expansion 20' - 800'C. |
102/K |
4-6.5 |
7.9 X 102 |
2-4 X 102 |
2.5 X 102 |
5.7X102 |
7 X 102 |
9 X 102 |
Specific Heat capacity
20' - 100'C. |
J/Kg.K |
|
800-900 |
750-900 |
800-900 |
|
|
|
| Thermal Conductivity 20' - 100'C. |
W/mk |
1.2-2.6 |
2-3 |
1.3-1.8 |
|
6-8 |
20 |
23 |
| Resistance to Thermal shock |
K |
150-170 |
100 |
>300 |
300 |
150 |
150 |
60 |
| Hardness (Mohs Scale) |
Mohs |
7 |
8 |
6 |
|
8 |
8.5 thita |
9+ |
| Dielectric Constant |
|
6 |
6 |
5 |
6 |
6 |
8.5 |
8.9 |
| Withstand Voltage |
KV |
>20 |
>30 |
|
|
|
|
|
| Dissipation (loss) Factor Max at 48-62 Hz |
|
|
1.5 |
|
|
|
|
|
| Volume Hesistivity at 20'C. |
cm |
1012 |
102 |
1011 |
103 |
|
103 |
1014 |
| Surface Hesistivity Min |
|
|
1010 |
|
1010 |
1010 |
1010 |
1010 |
