Conventional superconductor

Conventional superconductors are materials that display superconductivity as described by BCS theory or its extensions. This is in contrast to unconventional superconductors, which do not. Conventional superconductors can be either type-I or type-II.

Most elemental superconductors are conventional. Niobium and vanadium are type-II, while most other elemental superconductors are type-I. Critical temperatures of some elemental superconductors:

Element Tc (K)
Al 1.20
Hg 4.15
Mo 0.92
Nb 9.26
Pb 7.19
Sn 3.72
Ta 4.48
Ti 0.39
V 5.30
Zn 0.88

Most compound and alloy superconductors are type-II materials. The most commonly used conventional superconductor in applications is a niobium-titanium alloy - this is a type-II superconductor with a superconducting critical temperature of 11 K. The highest critical temperature so far achieved in a conventional superconductor was 39 K (-234 °C) in magnesium diboride.

BKBO

Ba0.6K0.4BiO3 is an unusual superconductor (a non-cuprate oxide) - but considered 'conventional' in the sense that the BCS theory applies.[1][2]

gollark: The operating principles are different though.
gollark: It's easier to think about them as sigils to invoke dark gods instead of electronic circuits.
gollark: I'm sure someone somewhere is studying this.
gollark: What if RF electrochemistry?
gollark: I mean, you can already 3D-print technically-functional guns. Eventually it'll probably be actually-functional ones. Within a few decades with biotech advancements you might be able to just shove together a deadly pathogen on a desktop.

References
  1. Oxide superconductors
  2. Superconducting properties of under- and over-doped BaxK1−xBiO3 perovskite oxide


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