increase in the number of carriers

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It is based on manganese, cobalt, nickel and copper and other metal oxides as the main material, the use made of ceramic art. These metal oxides have semiconductor properties, because of the way completely similar to the conductive germanium, silicon and other semiconductor materials. Low temperature,stainless steel tube these oxides the carrier (electron and hole) number of small, so its resistance value higher; as the temperature increases, increase in the number of carriers, so the resistance decreases.

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