Authors: Mohazzabi, Pirooz; Behroozi, Feredoon

Source: Canadian Journal of Physics, Volume 85, Number 3, March 2007 , pp. 231-238(8)

Publisher: NRC Research Press

Abstract:

The phenomenon of thermal expansion is discussed from a basic perspective. Using a new approach, the well-known equation that relates the interatomic distance to the mean total energy per atom in a solid is obtained. Unlike the standard derivation, the new treatment is free from the computational inconsistencies and yields the correct expression for thermal expansion at any temperature. The standard derivation of the equation is outlined and its shortcomings are discussed.PACS Nos.: 65.40.-b, 65.40.De

Nous étudions le phénomène de l'expansion thermique à partir d'une perspective de base. Utilisant une nouvelle approche, nous retrouvons l'équation bien connue qui relie la distance interatomique à l'énergie moyenne totale par atome dans le solide. Contrairement aux dérivations habituelles, cette nouvelle approche est libre de toute incohérence de calcul et donne l'expression correcte pour l'expansion thermique à toute température. Nous reprenons la dérivation habituelle et en soulignons les faiblesses.[Traduit par la rédaction]

Document Type: Research article

Publication date: 2007-03-01

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