A preparation method of a rapid bonding of a long silver-graphite electrical contact material and a solder strip material includes the following steps: first step, making a silver-graphite spindle into a silver-graphite electrical contact sheet material by an extrusion process; second step, performing a sintering to composite a solder strip material with the silver-graphite electrical contact sheet material to obtain a composite blank; and third step, performing a rolling and a heat treatment on the composite blank for one or more times to complete the composite of the long silver-graphite electrical contact material and the solder strip material. The method is a method for preparing a silver-based electrical contact material and solder composite material.

A preparation method of a rapid bonding of a long silver-graphite electrical contact material and a solder strip material includes the following steps: first step, making a silver-graphite spindle into a silver-graphite electrical contact sheet material by an extrusion process; second step, performing a sintering to composite a solder strip material with the silver-graphite electrical contact sheet material to obtain a composite blank; and third step, performing a rolling and a heat treatment on the composite blank for one or more times to complete the composite of the long silver-graphite electrical contact material and the solder strip material. The method is a method for preparing a silver-based electrical contact material and solder composite material.

A metal-graphene composite product in the form of a sliding contact of an electric power application, in which graphene flakes are dispersed in a matrix of the metal, as well as to a method for obtaining such a composite product.

A metal-graphene composite product in the form of a sliding contact of an electric power application, in which graphene flakes are dispersed in a matrix of the metal, as well as to a method for obtaining such a composite product.

In some embodiments, a method is provided that includes (1) providing aluminum; (2) providing carbon nanotube material; (3) combining the aluminum and carbon nanotube material to form a current-carrying, aluminum-carbon-nanotube component of an electrical switch device; and (4) assembling the electrical switch device using the aluminum-carbon-nanotube component. The aluminum-carbon-nanotube component is formed so as to have at least one of lower electrical resistivity and greater thermal conductivity than a component formed of aluminum without carbon nanotube material. Numerous other embodiments are provided.

In some embodiments, a method is provided that includes (1) providing aluminum; (2) providing carbon nanotube material; (3) combining the aluminum and carbon nanotube material to form a current-carrying, aluminum-carbon-nanotube component of an electrical switch device; and (4) assembling the electrical switch device using the aluminum-carbon-nanotube component. The aluminum-carbon-nanotube component is formed so as to have at least one of lower electrical resistivity and greater thermal conductivity than a component formed of aluminum without carbon nanotube material. Numerous other embodiments are provided.

An improved electrical contact alloy, useful for example, in vacuum interrupters used in vacuum contactors is provided. The contact alloy according to the disclosed concept comprises copper particles and chromium particles present in a ratio of copper to chromium particles of 2:3 to 20:1 by weight. The electrical contact alloy also comprises particles of a carbide, which reduces the weld break strength of the electrical contact alloy without reducing its interruption performance.

An improved electrical contact alloy, useful for example, in vacuum interrupters used in vacuum contactors is provided. The contact alloy according to the disclosed concept comprises copper particles and chromium particles present in a ratio of copper to chromium particles of 2:3 to 20:1 by weight. The electrical contact alloy also comprises particles of a carbide, which reduces the weld break strength of the electrical contact alloy without reducing its interruption performance.

A device for preventing a human body from being jammed by using a change in capacitance, includes: a sensor unit which detects a change in capacitance corresponding to a gap between an external conductor pressed by a human body approaching a driven object and an internal conductor; a signal processing unit which compares a detection signal of the sensor unit with a reference value and outputs a jamming occurrence signal indicating the human body being jammed in the driven object; a motor driving unit which drives a motor to move the driven object; and a control unit which controls the motor driving unit to stop or move the driven object in the opposite direction when the jamming occurrence signal is received from the signal processing unit, thereby preventing a safety accident caused by the human body being jammed.

There are provided a composite plated product wherein a composite plating film of a composite material containing carbon particles in a silver layer is formed on a base material and wherein the amount of the carbon particles dropped out of the composite plating film is small, and a method for producing the same. After a composite plating film of a composite material containing carbon particles in a silver layer is formed on a base material (of preferably copper or a copper alloy) by electroplating using a silver-plating solution to which the carbon particles are added, a treatment for removing part of the carbon particles on the surface thereof is carried out.