Direct measurements of water adsorption enthalpy on hafnia and zirconia

Sergey V. Ushakov; Alexandra Navrotsky

doi:10.1063/1.2108113

Direct measurements of water adsorption enthalpy on hafnia and zirconia

Sergey V. Ushakov, Alexandra Navrotsky

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144 Scopus citations

Abstract

A commercial surface area analyzer and Calvet-type microcalorimeter were combined for measurements of heats of gas-solid interactions, providing enhanced resolution, flexibility, and throughput compared to conventional methods. Integral adsorption enthalpies for half monolayer coverage on HfO2 and ZrO2 surfaces were found to be in the range -130-190 and -110-170 kJ per mole of gaseous H2 O for differently prepared monoclinic phases and -70 and -90 kJmole for tetragonal phases from precipitation. The surface enthalpy for anhydrous tetragonal ZrO2 was derived as 1.23±0.04 J m2 from water adsorption and high-temperature solution calorimetry data.

Original language	English (US)
Article number	164103
Pages (from-to)	1-3
Number of pages	3
Journal	Applied Physics Letters
Volume	87
Issue number	16
DOIs	https://doi.org/10.1063/1.2108113
State	Published - Oct 17 2005
Externally published	Yes

ASJC Scopus subject areas

Physics and Astronomy (miscellaneous)

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@article{46d9a59c606442eabaae61d8d7688582,

title = "Direct measurements of water adsorption enthalpy on hafnia and zirconia",

abstract = "A commercial surface area analyzer and Calvet-type microcalorimeter were combined for measurements of heats of gas-solid interactions, providing enhanced resolution, flexibility, and throughput compared to conventional methods. Integral adsorption enthalpies for half monolayer coverage on HfO2 and ZrO2 surfaces were found to be in the range -130-190 and -110-170 kJ per mole of gaseous H2 O for differently prepared monoclinic phases and -70 and -90 kJmole for tetragonal phases from precipitation. The surface enthalpy for anhydrous tetragonal ZrO2 was derived as 1.23±0.04 J m2 from water adsorption and high-temperature solution calorimetry data.",

author = "Ushakov, {Sergey V.} and Alexandra Navrotsky",

note = "Funding Information: Part of this work was supported by UC-SMART program and Motorola Inc. They authors thank D. Gilley, J. Kenvin, and F. Garner (Micoromeritics Inc.) for discussions and G. Wayrynen (UCD) for technical support. Monoclinic sample from gas phase deposition used in this study was prepared by W. Gordon and B. Tissue (Virginia Tech). The authors also thank N. Dalalo, M. Wang, R. Castro, L. Mazeina, and A. Levchenko for instrument testing, feedback, and discussion. They acknowledge the National Center for Electron Microscopy at the Lawrence Berkeley National Laboratory for the use of its facilities.",

year = "2005",

month = oct,

day = "17",

doi = "10.1063/1.2108113",

language = "English (US)",

volume = "87",

pages = "1--3",

journal = "Applied Physics Letters",

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T1 - Direct measurements of water adsorption enthalpy on hafnia and zirconia

AU - Ushakov, Sergey V.

AU - Navrotsky, Alexandra

N1 - Funding Information: Part of this work was supported by UC-SMART program and Motorola Inc. They authors thank D. Gilley, J. Kenvin, and F. Garner (Micoromeritics Inc.) for discussions and G. Wayrynen (UCD) for technical support. Monoclinic sample from gas phase deposition used in this study was prepared by W. Gordon and B. Tissue (Virginia Tech). The authors also thank N. Dalalo, M. Wang, R. Castro, L. Mazeina, and A. Levchenko for instrument testing, feedback, and discussion. They acknowledge the National Center for Electron Microscopy at the Lawrence Berkeley National Laboratory for the use of its facilities.

PY - 2005/10/17

Y1 - 2005/10/17

N2 - A commercial surface area analyzer and Calvet-type microcalorimeter were combined for measurements of heats of gas-solid interactions, providing enhanced resolution, flexibility, and throughput compared to conventional methods. Integral adsorption enthalpies for half monolayer coverage on HfO2 and ZrO2 surfaces were found to be in the range -130-190 and -110-170 kJ per mole of gaseous H2 O for differently prepared monoclinic phases and -70 and -90 kJmole for tetragonal phases from precipitation. The surface enthalpy for anhydrous tetragonal ZrO2 was derived as 1.23±0.04 J m2 from water adsorption and high-temperature solution calorimetry data.

AB - A commercial surface area analyzer and Calvet-type microcalorimeter were combined for measurements of heats of gas-solid interactions, providing enhanced resolution, flexibility, and throughput compared to conventional methods. Integral adsorption enthalpies for half monolayer coverage on HfO2 and ZrO2 surfaces were found to be in the range -130-190 and -110-170 kJ per mole of gaseous H2 O for differently prepared monoclinic phases and -70 and -90 kJmole for tetragonal phases from precipitation. The surface enthalpy for anhydrous tetragonal ZrO2 was derived as 1.23±0.04 J m2 from water adsorption and high-temperature solution calorimetry data.

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JO - Applied Physics Letters

JF - Applied Physics Letters

IS - 16

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ER -

Direct measurements of water adsorption enthalpy on hafnia and zirconia

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