No electrical engineering without conductors!
|Hundreds of specialized metal alloys exist just for "wires" because besides σ, other demands must be met, too:||Money, Chemistry (try Na!), mechanical and thermal properties, compatibility with other materials, compatibility with production technologies, ...|
|Example for unexpected conductors being "best" compromise:||Poly Si, Silicides, TiN, W in integrated circuits.|
Don't forget Special Applications:
- Contacts (switches, plugs, ...);
- Heating elements; ...
- Transparent conductors