| 释义 |
ˌsuperconducˈtivity Physics.
[super- 10 a.]
The property of having zero electrical resistivity exhibited by some substances at temperatures close to absolute zero.
1913H. K. Onnes in Proc. Sect. Sci. K. Akad. Wetensch. Amsterdam XV. 1428 (heading) Experiments on the possible influence of contact with an ordinary conductor upon the superconductivity of mercury. 1934Times Lit. Suppl. 26 July 531/3 A similar property of superconductivity, acquired at specific low temperatures, has since been found also in a number of other metals and in certain alloys. 1959Sci. News LI. 21 The idea of loss-free electromagnetic devices was immediately suggested when superconductivity was first discovered, and a number of efforts have since been made to find metals or alloys that would exhibit superconductivity at higher than [liquid] helium temperatures. 1978Jrnl. R. Soc. Arts CXXVI. 608/2 Superconductivity..offers the prospect of lower capital costs and higher efficiencies than conventional generators for large units.
So superconˈductive a. = superconducting ppl. a.
1913H. K. Onnes in Proc. Sect. Sci. K. Akad. Wetensch. Amsterdam XVI. 116 The actual degree of conductivity of the superconductive mercury. 1955H. B. G. Casimir in W. Pauli Niels Bohr 119 There exist many metals that do not become superconductive in the temperature range in which they have been investigated. 1966K. Mendelssohn Quest for Absolute Zero ix. 199 In 1930 de Haas and Voogd had found that wires of lead-bismuth alloy remained superconductive in magnetic fields as high as 20,000 oersted. 1972Physics Bull. Oct. 615/1 The highest transition temperature for superconductive materials reported so far is 21 K in a three element compound, niobium-aluminium-germanium. |