Non-linear resistance elements and method for manufacturing same

摘要

A novel non-linear resistance element or varistor element is provided by the invention. The body of the element is a ceramic sintered body mainly composed of titanium dioxide admixed with small amounts of oxides of niobium, tantalum and/or antimony and electrodes are provided with a metallic material. Different from the conventional varistor elements, the electrode is bonded to the sintered body with ohmic contact by the techniques of flame spraying or electroless plating depending on the kind of the metallic material for the electrode selected from silver, aluminum, nickel and the like. Further improvement is proposed to increase the bonding strength of lead wires on to the electrodes by soldering as accomplished by providing a layer of a material having good solder-receptivity on the electrode which also serves for preventing the oxidation of the electrode material.