Oxide ceramics based on Al2O3
GRANALOX® NM 9212 wear-resistant ceramics, simple components for mechanical and electrical engineering
GRANALOX® NM 9620 F electrical insulating parts, metallizable ceramics, polishable machine components, chemicals- resistant components, ballistic armouring,
GRANALOX® NM 9922 engeneering pramic, constructional elements
Table 1: Specifikation/Properties of oxide ceramics based on Al2O3
|
Trade description |
|
|
GRANALOX®NM 9212 |
GRANALOX® NM 9620 F |
GRANALOX® NM 9922 |
|
Qualification based on ÈSN EN 60672 |
|
|
C 786 |
C 795 |
C 799 |
|
|
Symbol |
Units |
|
|
|
|
Al2O3 content |
|
[%] |
92 |
96 |
99,7 |
|
Open porosity |
pa |
[%] |
0 |
0 |
0 |
|
Bulk density |
ρa |
[g.cm-3] |
3.4 |
3.5 |
3.7 |
|
Modulus of elasticity |
E |
[GPa] |
220 |
280 |
300 |
|
Flexural strength |
σ |
[MPa] |
250 |
280 |
300 |
|
Mean coefficient of linear thermal expansion |
α30-600 |
[10-6 K-1] |
6-8 |
6-8 |
7-8 |
|
Thermal conductivity |
λ30-100 |
[Wm-1K-1] |
14-24 |
16-28 |
19-30 |
|
Resistance to thermal shock |
ΔT |
[K] |
140 |
140 |
140 |
|
Relative permittivity |
εr |
- |
9 |
9 |
9 |
|
Volume resistivity in terms of temperature |
ρv,30 |
[Ω.m] |
1012 |
1012 |
1012 |
|
ρv,200 |
[Ω.m] |
1010 |
1010 |
1010 |
|
|
Colour |
|
|
white |
white |
white |