Refractory Technology
Silica bricks are never used for lining the

Beehive coke ovens
Roof of open hearth furnace
By-product coke ovens
Dome of blast furnace stoves

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Refractory Technology
Cermets are

Having high strength & resistance to high temperature
All of these
Used in space vehicles, missiles & nuclear energy plants
Composite material containing both ceramic & metallic constituents

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