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Substrates for the electronics
Zirkon Oxid(ZrO2)
Zirkon oxide (ZrO2) has a very high coeffizient of expansion.Therefore this material is predestinated as contact material between ceramic and steel.
Feature
- High heat strain (α=11 x 10 -6 /K, similar to some kinds of steel)
- Very good thermic insulation respectively low thermal conductivity (2,5 bis 3 W/mK)
- High resistance against spreading of fissures, (6,5 bis 8 MPam 1/2)
- Capability to transport oxigen iones (used at measuring of oxygen partial pressure in lamda oxygen sensors
One more excellent characteristic is the combination of very low heat conductivity and very high strength of material. Also zirconia has the capability to transport oxigen iones. Zirconia –Components are much more expensive than aluminium-oxide components.
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