A Grüneisen Relation on Constant‐Pressure Lines

S. J. Burns, Girish Dahake, Zhong Ding, Suresh Kudallur, Sujeet Kumar, Kangjie Li, Ramakrishnan Srinivasan, Ken Stack, Natarajan Venkataraman, Chuan Wang, Fuqian Yang, Yiyang Zhou

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3 Scopus citations


Grüneisen's constant, γ, is ideally temperature‐independent on constant‐volume lines; a similar constant, λ, which is ideally temperature‐independent on isobaric lines, has been found. The comparison between γ and λ shows that both expressions contain the ratio of the volumetric thermal expansion coefficient to the specific heat capacity; γ has an additional temperature dependence due to the thermal part of the compressibility, whereas λ has only a slight thermal component due to the volume per unit mass. λ has been chosen so that λ=γ at the point where the temperature and pressure are both zero. For most materials it is expected that λ≥γ with a different temperature dependence. It is shown empirically for a selection of ceramics that λ is nearly temperature‐independent and has a value between 0.7 and 1.4.

Original languageEnglish
Pages (from-to)3341-3345
Number of pages5
JournalJournal of the American Ceramic Society
Issue number12
StatePublished - Dec 1992

ASJC Scopus subject areas

  • Ceramics and Composites
  • Materials Chemistry


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