|
Ceramic physical properties *
|
Impervious materials |
Porous materials |
|
Dimension |
Alsint
99,7 |
Pythagoras |
Sillimantin
60 NG |
Sillimantin
60 |
Sillimantin
KS |
Al2 O3 Content |
%
|
99,7 |
60 |
73-75 |
73-75 |
70 |
Alkali content |
%
|
0,05 |
3,0 |
- |
- |
- |
Type acc. DIN VDE 0335 |
-
|
799 |
610 |
- |
530 |
- |
Water absorption |
%
|
≤0,2 |
≤0,2 |
5 |
12 |
12 |
Leakage rate at 20°C (Hélium) |
mbar·I·sֿ ¹ |
10ֿ 10 |
10ֿ 10 |
- |
- |
- |
Density |
g·cmֿ ³
|
3,80-3,93 |
2,60 |
2,70 |
2,30 |
2,30 |
Flexural strength |
MPa
|
300 |
120 |
50 |
30 |
30 |
Hardness (Mohs scala) |
-
|
9 |
8 |
- |
- |
- |
Thermal
expansion |
20 - 300°C
20 - 700°C
20-1000°C |
10ֿ 6·degrésֿ ¹ |
7,0
7,6
8,0 |
3,6
4,5
5,1 |
4,6
5,2
5,7 |
4,6
5,3
5,7 |
4,6
5,3
5,7 |
Thermal
conductivity |
20 - 100°C |
W·ֿ ¹·Kֿ ¹ |
26,0 |
2,0 |
- |
1,4 |
1,4 |
Maximum working temperature**
|
°C |
1700 |
1400 |
1650 |
1350 |
1350 |
Dielectric strength related to
1,5
mm wall thickness |
kV·mmֿ ¹ |
17 |
17 |
- |
- |
- |
Volume resistivity D.C.
at 20°C |
Ω·cm |
1014 |
1013 |
- |
- |
- |
Thermal shock resistance
|
- |
good |
good |
good |
very good |
very good |
Dimension of pores approx. |
µm
|
- |
- |
8-9 |
2 |
2 |
*The physical properties of ourp roducts stated above are only valid for test specimens. The transfer of these values to other forms and dimensions is true only up to a point. In practice Alsint 99,7 samples p.e. have a flexural strength between 160 and MPa, depending on wall thickness, geometry, surface finish, aftertretment and manufacturing process.
** Depending on applied load
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