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Metal > Zirconium > Zirconium OxideZirconium Oxide, ZrO2 Zirconia is an extremely refractory material. It offers chemical and corrosion inertness to temperatures well above the melting point of alumina. The material has low thermal conductivity. It is electrically conductive above 600°C and is used in oxygen sensor cells and as the susceptor (heater) in high temperature induction furnaces. With the attachment of platinum leads, nernst glowers used in spectrometers can be made as a light emitting filament which operates in air. .Key Properties check Use temperatures up to 2400°C check High density check Low thermal conductivity (20% that of alumina) check Chemical inertness check Resistance to molten metals check Ionic electrical conduction check Wear resistance check High fracture toughness check High hardness
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