Heat capacity of hafnia at low temperature

Wei Zhou, Quan Shi, Brian F. Woodfield, Alexandra Navrotsky

Research output: Contribution to journalArticlepeer-review

16 Scopus citations

Abstract

The low temperature (2 to 300) K heat capacity of monoclinic hafnia (HfO2) was measured using the heat capacity option of a Quantum Design Physical Property Measurement System (PPMS). The thermodynamic functions in this temperature range were derived by curve fitting. The standard entropy and enthalpy of hafnia at T = 298.15 K was calculated to be 56.15 ± 0.57 J · mol-1 · K-1 and 9.34 ± 0.09 kJ · mol-1, respectively. The results are in fairly good agreement with old data, which only covered temperatures from (50 to 298) K. Hafnia has a higher heat capacity than zirconia at all temperatures from (2 to 300) K.

Original languageEnglish (US)
Pages (from-to)970-973
Number of pages4
JournalJournal of Chemical Thermodynamics
Volume43
Issue number6
DOIs
StatePublished - Jun 2011
Externally publishedYes

Keywords

  • Hafnia
  • Heat capacity
  • PPMS

ASJC Scopus subject areas

  • Atomic and Molecular Physics, and Optics
  • Materials Science(all)
  • Physical and Theoretical Chemistry

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