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Ceramics make excellent refractory materials. A material is said to be refractory if it:
A furnace is made of a refractory brick wall of thickness 0.5 metre and thermal conductivity 0.7 W/m.°K For the same temperature drop and heat loss, this refractory wall can be replaced by a layer of diatomaceous earth of thermal conductivity 0.14 W/m.K and thickness __________ metre.
Which one of the following is a neutral refractory?
Which of the following is an example of a neutral refractory?
Which is a neutral refractory?