Dilute copper alloy material, dilute copper alloy wire, dilute copper alloy twisted wire and cable using the same, coaxial cable and composite cable, and method of manufacturing dilute copper alloy material and dilute copper alloy wire

摘要

A dilute copper alloy material includes, based on a total mass of the dilute copper alloy material, 2 to 12 mass ppm of sulfur, 2 to 30 mass ppm of oxygen, 4 to 55 mass ppm of titanium, and a balance of pure copper and inevitable impurity. A part of the sulfur and the titanium forms a compound or an aggregate of TiO, TiO₂, TiS or Ti—O—S, and an other part of the sulfur and the titanium forms a solid solution. TiO, TiO₂, TiS and Ti—O—S distributed in a crystal grain of the dilute copper alloy material are not more than 200 nm, not more than 1000 nm, not more than 200 nm and not more than 300 nm, respectively, in particle size thereof, and not less than 90% of particles distributed in a crystal grain of the dilute copper alloy material are 500 nm or less in particle size.