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Spelling resistance: The breaking or cracking or peeling off the refractory is known as spelling. A good refractory must show a good resistance to thermal spelling. Thermal spelling can be decreased by minimizing the development of internal stress by:
(1) Using refractory with high porosity, good thermal conductivity and low coefficient of expansion.
(2) Avoiding sudden temperature changes.
(3) Proper furnace design.
What are the objectives of annealing? Annealing , is a heat treatment where in a material is altered, causing alters in its properties like as strength and hardness. It is a p
The following three types of breakdown are possible in Dielectrics: (a) Electrothermal Breakdown - This is caused by the heat produced because of the dielectric loss which is
1. a) How are Polymers classified? b) Define polymerization. Differentiate addition and condensation polymerization. 2. a) Explain the free radical mechanism of addition p
Ask question #Minimum 100 words accepted`How Daniel cell works?
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Oxidation - Silicon has the unique ability to be oxidized into silica, which produces a chemically stable, protective and insulating layer on the surface of the wafer. The produc
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