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Thermal spelling: 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
merits and demerits of free radical polymerisation
Emulsification: Emulsification can be defined as the property of oils to get intimately mixed with water easily. Emulsions can be oil in water emulsion or water in oil emulsion. C
Ask queswhat is axontion #Minimum 100 words accepted#
Pure silicon at zero K is an Insulator.
Explain the phenomenon of polarization in dielectric materials. Polarization in Dielectric Materials: If a material contains polar molecules, they will usually be in rando
Refractoriness: It indicates the capacity of a material to withstand heat without appreciable deformation or softening under particular operating conditions and is measured as the
all about aeration in water system
Free Electron theory of metals This theory tells that, metals conduct electricity due to the presence of free electrons in it. The outermost shells of metal atoms will be loose
to determine the emf of cell uaing pottentiometre
Applications: Piezoelectric materials serve as a source of ultrasonic waves. At sea, they might be used to calculate depth, distance of shore, position of icebergs, submarines. Th
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