Sealing electrode and surge absorber using such electrodes

Details Sealing electrode and surge absorber using such electrodes Sealing electrode and surge absorber using such electrodes

H - Electricity

01

T

H01T 1/24 (2006.01) H01C 1/024 (2006.01) H01T 4/12 (2006.01)

Patent

CA 2107679

ABSTRACT A surge absorbing element is put into a glass tube, which is sealed by sealing electrodes in a state where the tube is filled with an inert gas, thereby producing a surge absorber. Each of the sealing electrodes comprises an electrode element made of an alloy containing iron and nickel, and copper thin films or having predetermined thicknesses and formed on both faces of the electrode element or on one side which is in contact with the glass tube or faces the interior of the glass tube. it is preferable to form a Cu20 film on the surface of the copper thin film. The sealing electrodes can be sealed in an inert gas atmosphere. It has an excellent sealing capability to a glass tube, and has an action of accelerating electron emission. If the copper thin films are formed on both faces of the electrode element, leads can be soldered easily to the outer faces of the sealing electrodes. A surge absorber thus sealed by the sealing electrodes has a high surge resistance and a long life because its conductive film and micro-gap are not easily deteriorated at the time of sealing and arc discharging.

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