Low Heat/Thermal Conductivity Electric Conductive Materials

[abdulbadii]

TL;DR Summary

What is an electric conductive material which is the least heat/thermal conductive?

What is/are the electric conductive material(s) which has/have the least heat/thermal conductive?

 

[berkeman]

What materials have you looked at so far? What is the application? Will this be a thin film, a solid wire or bus bar, or a liquid maybe? The more details you can give, the better we will be able to help you.

 

[Baluncore]

What is/are the electric conductive material(s) which has/have the least heat/thermal conductive?

Some stainless steel alloys used for cookware or kettles may surprise you. The polished surface, and the internal grain structure, can be used to advantage.

If the low thermal conduction, and the high electrical conduction, can be arranged to be perpendicular, then consider a multi-layer laminate.

What is the application ?

 

[jrmichler]

Try searching thermoelectric cooling. From one of the hits:

Requirements for thermoelectric materials:
High electrical conductivity (to reduce electrical resistance, a source of waste heat);
Low thermal conductivity (so that heat doesn't come back from the hot side to the cool side); this usually translates to heavy elements

Sounds like what you are looking for.

 

[f95toli]

Superconducting materials (both conventional and HTS), this is what is used in cryogenic applications. E.g. NbTiN is used both for DC and RF applications and that the electrical losses are very low is of course a bonus.

As has already been mentioned stainless steal is also an option, but might be a bit too lossy for many applications.
Generally speaking, alloys have lower thermal conductivity than "pure" metals and are therefore often used. copper-beryllium and copper-nickel would be two widely used examples.