Alloys are preferred over metals for making the heating element of heaters.why?
what is the work of heating element?
what is the work of heating element?
For a heating element, you want to use a metal with a high electrical resistance, and a high melting point (obviously). If this heating element is going to be exposed to air and/or water, it also needs to be corrosion resistant. Nicrome which is an alloy of nickel and chromium, is usually a good choice.
Alloys generally have higher resistance than the pure metals that they are made of, because the alloy disorder of the atoms causes additional electron scattering. And because of all above stated reasons alloys are preferred over metals.
A typical heating element is usually a coil, ribbon (straight or corrugated), or strip of wire that gives off heat much like a lamp filament. When an electric current flows through it, it glows red hot and converts the electrical energy passing through it into heat, which it radiates out in all directions.
For a heating element, you want to use a metal with a high electrical resistance, and a high melting point (obviously). If this heating element is going to be exposed to air and/or water, it also needs to be corrosion resistant. Nicrome which is an alloy of nickel and chromium, is usually a good choice.
Alloys generally have higher resistance than the pure metals that they are made of, because the alloy disorder of the atoms causes additional electron scattering. And because of all above stated reasons alloys are preferred over metals.
A typical heating element is usually a coil, ribbon (straight or corrugated), or strip of wire that gives off heat much like a lamp filament. When an electric current flows through it, it glows red hot and converts the electrical energy passing through it into heat, which it radiates out in all directions.
