A heater having a substrate composed of a heat-resistant and electrically insulating material, a heater element formed on the surface of the substrate in a belt-shape in the longitudinal direction containing an alloy of Ag and Pd having a weight ratio Ag/Pd of 90/10 to 70/30, glass, and an inorganic oxide and/or an inorganic nitride of 0.1 to 20 wt % to the weight of the alloy of Ag and Pd, and a power supply terminal part formed in connection with the heater element. The heater is suited to use for a fixing device of an image forming apparatus.
A heater for fusing toner images onto recording paper is provided. The heater includes a supporting base that has an upper surface and a lower surface. The base has a relatively low thermal conductivity. The heater also includes a heating element formed on the upper surface of the base. A heat conductor is provided on the upper or lower side of the base. The heat conductor has a thermal conductivity greater than the thermal conductivity of the base.
