Refractory Technology
Tar bonded dolomite bricks

Are used in outer lining of L.D. converters
Are stored under controlled temperature & humidity to avoid hydration
All of these
Have poorer hydration resistance than pitch bonded bricks

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Refractory Technology
Cermets are

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

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