| 单词 |
Wiedemann–Franz |
| 释义 |
Wiedemann–Franz Physics.|ˈviːdəman fraːnts|
[The names of G. H. Wiedemann (1826–99) and R. Franz (1827–1902), German physicists, who published the law in 1853 (Ann. d. Physik LXXXIX. 497).]
Wiedemann–Franz law: the law that at any given temperature the ratio of the thermal to the electrical conductivity has approximately the same value for all metallic elements; Wiedemann–Franz ratio: this ratio or the Lorenz ratio (see Lorenz).
1924J. R. Partington in H. S. Taylor Treat. Physical Chem. I. xi. 490 The Wiedemann-Franz law is only approximate. 1966Phillips & Williams Inorg. Chem. II. xix. 23 The transition metals are also good conductors of heat. On the free-electron theory it is predicted that there should be a direct relation between the thermal, k, and electrical, σ, conductivities, the Wiedemann–Franz ratio. 1975D. G. Fink Electronics Engineers' Handbk. vi. 10 The Wiedemann-Frantz [sic] ratio L is defined as L = λ/σT. 1975Jrnl. Low Temperature Physics XX. 691 The Lorenz numbers..are very close to the theoretical value..predicted by the Wiedemann–Franz law for pure electronic heat conduction limited by impurities. |
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