Table 1 provided below gives the properties of impervious materials without zirconia Y-TZP.
Table 1. Properties of impervious materials without Zirconia Y-TZP
Material |
Units |
Alsint 99.7 |
Pythagoras 1800Z |
Pythagoras |
Zirconia MgO-PSZ |
Zirconia CaO-FSZ |
Halsic-I |
Halsic-S |
Al2O3 content |
% |
99.7 |
76 |
60 |
- |
- |
- |
- |
Alkali content |
% |
- |
0.5 |
3 |
- |
- |
- |
- |
SiC content |
% |
- |
- |
- |
- |
- |
88-92 |
99 |
Si-free |
% |
- |
- |
- |
- |
- |
8-12 |
0.1 |
Type according to DIN EN 60672 |
- |
C 799 |
C 620 |
C 610 |
- |
- |
- |
- |
Water absorption capacity |
% |
≤0.2 |
≤0.2 |
≤0.2 |
≤0.2 |
≤0.2 |
≤0.1 |
≤0.1 |
Leakage rate at 20°C |
hPa dm3s-1 |
10-10 |
- |
10-10 |
- |
- |
- |
- |
Bulk density |
g.cm-3 |
3.75-3.94 |
3 |
2.6 |
5.6 |
5.4 |
3.1 |
3.1 |
Flexural strength 20°C (3-point) |
MPa |
300 |
150 |
120 |
500 |
200 |
240-280 |
350-400 |
Flexural strength 1300°C (3-point) |
MPa |
- |
- |
- |
- |
- |
250-300 |
370-420 |
Young’s modulus |
GPa |
300-380 |
150 |
100 |
- |
- |
370 |
420 |
Hardness (Mohs scale) |
- |
9 |
8 |
8 |
- |
- |
- |
- |
Thermal expansion 20-700°C |
10-6 K-1 |
7.8 |
5.6 |
5.4 |
9.8 |
9.9 |
3.7 |
- |
Thermal expansion 20-1000°C |
10-6 K-1 |
8.6 |
6 |
6 |
10.3 |
- |
4.3 |
5 |
Thermal conductivity 200°C |
Wm-1K-1 |
25 |
6 |
2 |
- |
- |
100 |
124 |
Maximal approximate temp for load-bearing elements3 |
°C |
1700 |
1600 |
1400 |
1500 |
2000 (w/o load) |
1350 |
16004 |
Dielectric strength (IEC 672-2) |
kV.mm-1 |
17 |
17 |
17 |
- |
- |
- |
- |
Resistivity at DC voltage 20°C |
Ω.cm |
1014 |
1013 |
1013 |
- |
- |
- |
- |
Thermal shock resistance |
- |
good |
excellent |
good |
good |
- |
good |
excellent |
Diameter of pores, av |
µm |
- |
- |
- |
- |
- |
- |
- |
Specific heat capacity 20-100°C |
J.kg-1.K-1 |
990 |
900 |
900 |
- |
- |
- |
- |
Properties of Porous Materials
Table 2 shows the properties of porous materials.
Table 2. Properties of porous materials
Material |
Units |
Alsint porous |
Sillimantin 60 |
Sillimantin 65 |
Sillimantin 60 NG |
Sillimantin KS |
SiC clay bonded1 |
Halsic-R |
Halsic-RX |
Fused silica |
Al2O3 content |
% |
99.5 |
72-74 |
78-80 |
72-74 |
70 |
- |
- |
- |
- |
Alkali content |
% |
- |
1 |
1 |
1 |
1 |
- |
- |
- |
- |
SiC content |
% |
- |
- |
- |
- |
- |
70-90 |
99 |
99 |
- |
Si-free |
% |
- |
- |
- |
- |
- |
- |
0.1 |
0.1 |
- |
Type according to DIN EN 60672 |
- |
- |
C 530 |
- |
- |
- |
- |
- |
- |
- |
Water absorption capacity |
% |
2.7 |
9 |
11 |
6 |
9 |
8-13 |
5 |
5 |
4.6 |
Leakage rate at 20°C |
hPa dm3s-1 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
Bulk density |
g.cm-3 |
3.6 |
2.40-2.45 |
2.45-2.50 |
2.60 |
2.40-2.45 |
2.2-2.5 |
2.7 |
2.7 |
1.92-2 |
Flexural strength 20°C (3-point) |
MPa |
70-110 |
45 |
55 |
60 |
45 |
30 |
80-100 |
80-90 |
30-40 |
Flexural strength 1300°C (3-point) |
MPa |
- |
- |
- |
- |
- |
- |
90-110 |
90-110 |
45-602 |
Young’s modulus |
GPa |
- |
60 |
75 |
85 |
60 |
- |
280 |
280 |
30-40 |
Hardness (Mohs scale) |
- |
- |
- |
- |
- |
- |
- |
- |
- |
- |
Thermal expansion 20-700°C |
10-6 K-1 |
7.8 |
5.3 |
5.3 |
5.2 |
5.3 |
5 |
3.9 |
3.9 |
- |
Thermal expansion 20-1000°C |
10-6 K-1 |
8.6 |
5.7 |
6.3 |
5.7 |
5.7 |
5 |
4.5 |
4.5 |
0.5-0.9 |
Thermal conductivity 200°C |
Wm-1K-1 |
- |
1.4 |
1.4 |
- |
1.4 |
- |
35 |
35 |
- |
Maximal approximate temp for load-bearing elements3 |
°C |
1700 |
1350 |
1400 |
1600 |
1350 |
1300 |
16004
20005 |
approx 16504 |
1000 |
Dielectric strength (IEC 672-2) |
kV.mm-1 |
- |
- |
- |
- |
- |
- |
- |
- |
- |
Resistivity at DC voltage 20°C |
Ω.cm |
- |
- |
- |
- |
- |
- |
- |
- |
- |
Thermal shock resistance |
- |
good |
excellent |
excellent |
good |
excellent |
excellent |
excellent |
excellent |
excellent |
Diameter of pores, av |
µm |
1-3 |
2 |
1.5 |
8.5 |
2 |
3 |
24 |
24 |
0.2 |
Specific heat capacity 20-100°C |
J.kg-1.K-1 |
- |
800 |
900 |
900 |
- |
- |
- |
- |
- |
Results and Discussion
The listed values pertain to test specimens. They are only for reference purposes and cannot be unconditionally applied to other dimensions and shapes. Practically, Alsint 99.7 components provide mechanical strength values between 160 and 300 MPa, based on their actual shape, wall thickness, surface finish, post-processing and shaping process.
The test specimens were subject to the following conditions:
- Since different qualities are available (and for reference purposes only)
- At 700°C
- Dependent upon load
- Under oxidizing conditions
- Under inert atmosphere
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This information has been sourced, reviewed and adapted from materials provided by Morgan Advanced Materials.
For more information on this source please visit Morgan Advanced Materials.