Refractory Technology
Zirconia refractory

Has poor electrical conductivity at high temperature
Can not be used as an insulator
Is produced from baddeleyite
Does not react with basic slags

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Refractory Technology
Silica refractories

Crack when subjected to sudden change of temperature
Can not be used in the dome of hot blast stoves
All of these
Have lower thermal conductivity than fireclay bricks

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