Thermoelastic behavior of graphite from in situ high-pressure high-temperature neutron diffraction

S. Lowitzer; B. Winkler; M. Tucker

doi:10.1103/PhysRevB.73.214115

Thermoelastic behavior of graphite from in situ high-pressure high-temperature neutron diffraction

S. Lowitzer, B. Winkler, M. Tucker

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Abstract

We have studied the pressure-volume-temperature relationship of graphite up to pressures of 6 GPa and temperatures up to 1250 K. Neutron powder diffractograms were collected on the PEARL/HiPr diffractometer at ISIS/Rutherford Appleton Laboratory (UK). The heatable Paris-Edinburgh cell was employed. Temperature was measured by neutron resonance absorption spectroscopy. The pressure was obtained from an internal MgO standard. The Rietveld-refined data were fitted with several equation of states. The best fit is obtained with B=38 GPa, B′ =∂B∂P=9 and a temperature derivative ∂B∂T=-0.002 GPa K-1. These values are compared to data obtained earlier from diffraction measurements and ultrasound spectroscopy.

Original language	English
Article number	214115
Journal	Physical Review B - Condensed Matter and Materials Physics
Volume	73
Issue number	21
DOIs	https://doi.org/10.1103/PhysRevB.73.214115
State	Published - 2006
Externally published	Yes

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10.1103/PhysRevB.73.214115

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title = "Thermoelastic behavior of graphite from in situ high-pressure high-temperature neutron diffraction",

abstract = "We have studied the pressure-volume-temperature relationship of graphite up to pressures of 6 GPa and temperatures up to 1250 K. Neutron powder diffractograms were collected on the PEARL/HiPr diffractometer at ISIS/Rutherford Appleton Laboratory (UK). The heatable Paris-Edinburgh cell was employed. Temperature was measured by neutron resonance absorption spectroscopy. The pressure was obtained from an internal MgO standard. The Rietveld-refined data were fitted with several equation of states. The best fit is obtained with B=38 GPa, B′ =∂B∂P=9 and a temperature derivative ∂B∂T=-0.002 GPa K-1. These values are compared to data obtained earlier from diffraction measurements and ultrasound spectroscopy.",

author = "S. Lowitzer and B. Winkler and M. Tucker",

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AU - Lowitzer, S.

AU - Winkler, B.

AU - Tucker, M.

PY - 2006

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N2 - We have studied the pressure-volume-temperature relationship of graphite up to pressures of 6 GPa and temperatures up to 1250 K. Neutron powder diffractograms were collected on the PEARL/HiPr diffractometer at ISIS/Rutherford Appleton Laboratory (UK). The heatable Paris-Edinburgh cell was employed. Temperature was measured by neutron resonance absorption spectroscopy. The pressure was obtained from an internal MgO standard. The Rietveld-refined data were fitted with several equation of states. The best fit is obtained with B=38 GPa, B′ =∂B∂P=9 and a temperature derivative ∂B∂T=-0.002 GPa K-1. These values are compared to data obtained earlier from diffraction measurements and ultrasound spectroscopy.

AB - We have studied the pressure-volume-temperature relationship of graphite up to pressures of 6 GPa and temperatures up to 1250 K. Neutron powder diffractograms were collected on the PEARL/HiPr diffractometer at ISIS/Rutherford Appleton Laboratory (UK). The heatable Paris-Edinburgh cell was employed. Temperature was measured by neutron resonance absorption spectroscopy. The pressure was obtained from an internal MgO standard. The Rietveld-refined data were fitted with several equation of states. The best fit is obtained with B=38 GPa, B′ =∂B∂P=9 and a temperature derivative ∂B∂T=-0.002 GPa K-1. These values are compared to data obtained earlier from diffraction measurements and ultrasound spectroscopy.

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JO - Physical Review B - Condensed Matter and Materials Physics

JF - Physical Review B - Condensed Matter and Materials Physics

IS - 21

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ER -

Thermoelastic behavior of graphite from in situ high-pressure high-temperature neutron diffraction

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