Performance for parts made in different materials | ||||||
Item | Index | Unit | Steatite | Zirconia | 95 Al2O3 | 99 Al2O3 |
Physical Characteristics | Density | g/cm3 | 2.7 | 5.9 | 3.6 | 3.85 |
Water absorption | % | 0 | 0 | 0 | 0 | |
Sintering temperature | ºC | 1300 | 1650 | 1670 | 1690 | |
Mechanical Characteristics | Hardness | HV | 1300 | 1400 | 1600 | 1700 |
Rupture strength | 4pt | >1100 | >11000 | >2900 | >3500 | |
Compression strength | Kgf/cm2 | 18000 | 25000 | 25000 | 30000 | |
Thermal Characteristics | Max. operation Temp. | ºC | 1100 | 1600 | 1400 | 1500 |
Linear expansion coefficient | 10-6/ºC, 0-1000ºC | 6 | 10 | 7.8 | 8 | |
Heat resistance impact | T (ºC) | 110 | 350 | 220 | 200 | |
Thermal conductivity | W/m.k | 15 | 3 | 22 | 31 | |
Electrical Characteristics | Valume resistivity | Ω.cm | >1012 | >1012 | >1012 | >1012 |
Insulation Demage Strength | KT/m | 20 | 15 | 16 | 18 | |
Dielectric constant | 1MHz ( E ) | 5.8 | 12.5 | 9.0-10 | 9.2-10.5 |