Editorial Feature

Superconductors - Critical Temperatures of Some Pure Metals or Type 1 Superconductors

Background

Type 1 superconductors are mainly metals and metalloids that show some conductivity at room temperature. They were the first materials found to exhibit superconductivity. Mercury was the first element observed to display superconducting properties in 1911.

They generally require extreme cold before they will become superconducting. However, they exhibit a sharp transition as they move into the superconducting state.

The table below lists some Type 1 superconductors and their critical temperatures (Tc), i.e. the temperature at which they become superconducting.

Critical temperatures (Tc) of some pure metals or type 1 superconductors. Updated by Ibtisam Abbasi: 13/06/2022

Element

Symbol

Tc (K)

Tc (°C)

Tc (°F)

Aluminum Al 1.2 -271.95 -457.51
Beryllium Be 0.026 -273.124 -459.6232
Cadmium Cd 0.517 -272.633 -458.7394
Gallium (at Ambient Conditions) Ga 1.091 -272.059 -457.7062
at 1.4 Gpa 7 -266.15 -447.07
Hafnium Hf 0.128 -273.022 -459.4396
Mercury (α-mercury) Hg 4.154 -268.996 -452.1928
β-mercury 3.949 -269.201 -452.5618
Indium In 3.4145 -269.7355 -453.5239
Iridium Ir 0.1125 -273.0375 -459.4675
Lanthanum (Close Packed Hexagonal Structure) La 5 -268.15 -450.67
Face-centered cubic structure 5.95 -267.2 -448.96
Molybdenum Mo 0.915 -272.235 -458.023
Niobium Nb 9.288 -263.862 -442.9516
Osmium Os 0.655 -272.495 -458.491
Lead Pb 7.1997 -265.9503 -446.71054
Rhenium Re 1.697 -271.453 -456.6154
Ruthenium Ru 0.51 -272.64 -458.752
Tin Sn 3.722 -269.428 -452.9704
Tantalum Ta 4.483 -268.667 -451.6006
Technetium Tc 7.77 -265.38 -445.684
Thorium Th 1.368 -271.782 -457.2076
Titanium Ti 0.39 -272.76 -458.968
Tellurium (35 Gpa) Tl 7.5 -265.65 -446.17
Vanadium V 5.38 -267.77 -449.986
Tungsten W 0.0154 -273.1346 -459.64228
Zinc Zn 0.85 -272.3 -458.14
Zirconium Zr 0.546 -272.604 -458.6872

 

Some other elements do exhibit superconductivity, however require pressure at sufficiently low temperatures to induce superconducting behaviour.

 

Source: AZoM.com

 

Comments

  1. Abhijit Bhattacharyya Abhijit Bhattacharyya India says:

    It would be good to have critical current (I_c) data. Thanks.

The opinions expressed here are the views of the writer and do not necessarily reflect the views and opinions of AZoM.com.

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