Ultrafine conductor material, ultrafine conductor, method for preparing ultrafine conductor, and ultrafine electrical wire
View Patent ↗[Technical Problem] The invention is to provide a method for manufacture of an ultrafine conductor having sufficient electrical conductivity, and enhanced strength and stretch properties while suppressing manufacture cost, the same ultrafine conductor, as well as a material suited for the same ultrafine conductor. [Solution to Problem] To solve the above problem, there is provided a material for an ultrafine conductor, which includes a matrix formed of copper, chromium particles contained in the matrix, and tin contained in the matrix. The tin is present as a solid solution in the matrix.
1. A material for an ultrafine conductor, comprising
a matrix formed of copper,
chromium particles contained in the matrix, and
tin contained in the matrix, wherein the tin is present as a solid solution in the matrix,
wherein the chromium is present in an amount of from 3 at % to 5 at %, wherein an amount of the chromium and an amount of the tin are determined to satisfy the following formula 1:
0.15 ≦Y≦ 0.6−0.15( X− 3)
given that the amount of the chromium is X at % and the amount of the tin is Y at %, and wherein an amount of the copper is determined by subtracting a sum of X at % and Y at % from 100 at %.
2. An ultrafine conductor formed of material as claimed in claim 1 , comprising:
a short fibrous portion formed of chromium, and
a matrix having a local change generated over the entire matrix.
3. The ultrafine conductor as claimed in claim 2 , wherein aspect ratio of the short fibrous portion formed of chromium is from 0.05 to 0.8.
4. A method for preparing an ultrafine conductor, comprising the step of:
stretching material as claimed in claim 1 until a local change is generated over the entire matrix.
5. An ultrafine electrical wire, comprising:
a conductor portion obtained by stranding an ultrafine conductor as claimed in claim 2 , and
an insulating covering disposed over the conductor portion.
6. An ultrafine electrical wire, comprising:
a conductor portion obtained by stranding an ultrafine conductor as claimed in claim 3 , and
an insulating covering disposed over the conductor portion.