Heat capacity of hafnia at low temperature

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

doi:10.1016/j.jct.2011.02.002

Heat capacity of hafnia at low temperature

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

Research output: Contribution to journal › Article › peer-review

22 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 language	English (US)
Pages (from-to)	970-973
Number of pages	4
Journal	Journal of Chemical Thermodynamics
Volume	43
Issue number	6
DOIs	https://doi.org/10.1016/j.jct.2011.02.002
State	Published - Jun 2011
Externally published	Yes

Keywords

Hafnia
Heat capacity
PPMS

ASJC Scopus subject areas

Atomic and Molecular Physics, and Optics
General Materials Science
Physical and Theoretical Chemistry

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10.1016/j.jct.2011.02.002

Cite this

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title = "Heat capacity of hafnia at low temperature",

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.",

keywords = "Hafnia, Heat capacity, PPMS",

author = "Wei Zhou and Quan Shi and Woodfield, {Brian F.} and Alexandra Navrotsky",

note = "Funding Information: This work is supported by the Department of Energy under Grant Nos. DE-FG02-63ER46053 (UCD) and DE-FG02-05ER15666 (BYU) .",

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doi = "10.1016/j.jct.2011.02.002",

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TY - JOUR

T1 - Heat capacity of hafnia at low temperature

AU - Zhou, Wei

AU - Shi, Quan

AU - Woodfield, Brian F.

AU - Navrotsky, Alexandra

N1 - Funding Information: This work is supported by the Department of Energy under Grant Nos. DE-FG02-63ER46053 (UCD) and DE-FG02-05ER15666 (BYU) .

PY - 2011/6

Y1 - 2011/6

N2 - 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.

AB - 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.

KW - Hafnia

KW - Heat capacity

KW - PPMS

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JF - Journal of Chemical Thermodynamics

IS - 6

ER -

Heat capacity of hafnia at low temperature

Abstract

Keywords

ASJC Scopus subject areas

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