Oil, fur, silk, wool, rubber, glass, plastic, wood, paper, wax and ebonite are good insulators. Insulators are substances with tightly bound outer electrons and heavily resist the flow of electrons. Most nonmetals are classified as insulators.Know More
Air also serves as an insulator, although when heated to very high temperatures, it becomes a conductor. Glass also becomes a conductor at high temperatures.
A conductor is a material that allows the free flow of electrons. Most metals are good conductors, as the outer electrons freely flow from one atom to another. Silver and copper are among the best conductors, but gold, aluminum, iron, steel, brass and bronze also allow electrons to flow freely.
The normal flow of electrons is random in terms of speed and direction, but it can be influenced to move through a conductive material. When electrons move in a uniform pattern through conductive material, it is called dynamic electric current. Static electricity is an unmoving accumulation of electric charge. Electrons flow through the empty spaces between atoms, similar to the flow of water through a pipe. Just as a larger pipe allows for more water to flow, a thicker strip of the same conductive material will allow more electric current to flow.Learn more about Heating & Cooling
When insulating a home, fiberglass, polystyrene or cellulose are a few insulators that may be used. One material may appeal to you more than another depending on your personal desires.Full Answer >
Items that make good heat insulators include fiberglass, air, iron fibers, Polystyrene foam and thin plastic films, according to scientists at the Argonne National Laboratory. Some insulators work by having pockets of air to spread out heat. Other insulators reflect light away and thereby insulate against heat.Full Answer >
Good insulators are materials that do not allow heat to pass through them. They are also materials that either slow down or do not allow transfer of electricity through them.Full Answer >
Fiberglass insulation, Styrofoam and the down panels in winter jackets are all examples of strong thermal insulators that work to keep temperature consistent and retain internal heat while preventing temperature exchange. Thermal insulators work by trapping air, which does not conduct heat well or efficiently, and using it as a buffer between zones.Full Answer >