| Type | A-95 | A-997 |
|---|---|---|
| Al2O3 content [ % ] | 95 |
99,7 |
| Density [ g/cm3 ] | min. 3,78 |
min. 3,90 |
| Colour | white |
white |
| Open porosity [ % ] | 0 |
0 |
| Flextural strenght [ MPa ] | 330 |
370 |
| Compressive strenght[ Mpa ] | 3300 |
3900 |
| Modulus of elasticity, Young [ GPa ] | 340 |
380 |
| Vickers hardness [ HV 0,5 ] | 1700 |
2000 |
| Thermal conductivity [ W/mK ] | 24 |
28 |
| Thermal expansion coeff. [10-6 1/K] | 5,0 - 8,3 |
5,4 - 8,4 |
| Thermal schock resistance [ D T °C ] | 250 |
260 |
| Max. use temperature[ °C ] | 1500 |
1650 |
| Dielectric strenght [ kV/mm ] | 20 |
30 |
| Dielectric constant [ e r ] | 10 |
10 |
Resistivity against chemicals
Water |
Resistant |
|---|---|
Mild and strongs acids |
Resistant |
Strong base |
Moderately resistant |
Oxidising acids |
Resistant |
Mild base |
Resistant |
Hydrogen fluorid ( HF ) |
Non resistant |
Esters |
Resistant |
Ethers |
Resistant |
Aliphatic hydrocarbons |
Resistant |
Aromatic hydrocarbons |
Resistant |
Klórozott szénhidrogének |
Resistant |
Petrol |
Resistant |
Greases and oils |
Resistant |
