Is there a material that in solid state is a high conductor of electricity but low conductor of heat?

Question

It has to be in solid state [eg. a type of metal] and yet must be easyily obtainable. Price factors can be excluded.

Answer 1

That has to be a compromise.

I suggest lead, which has an electrical conductivity of 0.0481 10^6/cmΩ

which is only 1/12th of that of copper, and a thermal conductivity of 35.3 W/(m·K)  which is, again, 1/12th of that of copper.

All other materials would be liquid or gases.

On 2nd thought, you could solve your problem by using a good electrical conductor, but shape it like a heat sink / radiator, so that the heat doesn't get to "the other end", but gets dispersed along the length of the conductor.....?

Answer 2

Solid CARBON uses in battery industry and motor. It conducts current very well and Heat is almost difficult to get through. Very easy to obtain.

Answer 3

High tensile ceramics. They use them for insulators in the power industry. I used to be a claymaker and made basic 22KV high tensile ceramic tie-top insulators until China undercut our prices and forced us to close. Hope this helps.