Composite material for electrical contacts and method of producing same
AssigneesLs Electric Co., Ltd., Applied Carbon Nano Technology Co., Ltd
InventorsChul Dong Moon, Wook Dong Cho, Won Young Kim
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Abstract
The present disclosure relates to an electrical contact material that is a contact element that plays a role of blocking or allowing the flow of an electric circuit to pass through, and relates to an electrical contact composite material that satisfies the physical properties required to use as an electrical contact while reducing Ag content, and a method for manufacturing the same.
Claims8
A composite material for electrical contact, comprising:
- a silver (Ag) powder;
- a metal-based powder including at least one selected from nickel (Ni), tungsten (W), and tungsten carbide (WC);
- and
- an Ag/C composite powder including silver (Ag) and a carbon-based nanofiller,
- wherein the Ag/C composite powder is a material integrated by incorporating and dispersing carbon-based nanofillers in the Ag powder, and the Ag/C composite powder has a density of 8.40 to 9.50 g/cm3,
- wherein the carbon-based nanofiller includes at least one from the group consisting of single-walled carbon nanotubes (CNTs), multi-walled carbon nanotubes, and graphene,
- wherein when measuring thermal conductivity, the composite material satisfies 225.0 to 275.0 W/(m·K) at 60° C., 220.0 to 270.0 W/(m·K) at 80° C., and 215.0 to 265.0 W/(m·K) at 100° C.
A method for manufacturing a composite material for electrical contact, the method comprising performing a process, comprising:
- mixing a silver (Ag) powder, a metal-based powder, and an Ag/C composite powder including silver (Ag) and a carbon-based nanofiller to prepare a mixed powder;
- preparing a workpiece by sintering, rolling, or extruding the mixed powder;
- and
- heat-treating the workpiece,
- wherein the metal-based powder comprises at least one selected from nickel (Ni), tungsten (W), and tungsten carbide (WC), and
- wherein the Ag/C composite powder is a material integrated by inserting and dispersing carbon-based nanofillers into the Ag powder, and the Ag/C composite powder has a density of 8.40 to 9.50 g/cm3,
- wherein the Ag/C composite powder is prepared by performing:
- mixing the Ag powder and the carbon-based nanofiller, and then preparing a mixture obtained by performing low energy milling;
- and
- performing high energy milling on the mixture obtained by performing the low energy milling.
Dependencies are inferred from the claim text.