Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale

Alexander F. Goncharov; Jonathan C. Crowhurst; John K. Dewhurst; Sangeeta Sharma; Chrystele Sanloup; Eugene Gregoryanz; Nicolas Guignot; Mohamed Mezouar

doi:10.1103/PhysRevB.75.224114

Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale

Alexander F. Goncharov^*, Jonathan C. Crowhurst, John K. Dewhurst, Sangeeta Sharma, Chrystele Sanloup, Eugene Gregoryanz, Nicolas Guignot, Mohamed Mezouar

^*Corresponding author for this work

School of Physics and Astronomy

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

Abstract / Description of output

The equation of state of cubic boron nitride (cBN) has been determined to a maximum temperature of 3300 K at a simultaneous static pressure of up to more than 70 GPa. Ab initio calculations to 80 GPa and 2000 K have also been performed. Our experimental data can be reconciled with theoretical results and with the known thermal expansion at 1 bar if we assume a small increase in pressure during heating relative to that measured at ambient temperature. The present data combined with the Raman measurements we presented earlier form the basis of a high-temperature pressure scale that is good to at least 3300 K.

Original language	English
Article number	224114
Number of pages	6
Journal	Physical review B
Volume	75
Issue number	22
DOIs	https://doi.org/10.1103/PhysRevB.75.224114
Publication status	Published - Jun 2007

Keywords / Materials (for Non-textual outputs)

DIAMOND-ANVIL CELL
V-T EQUATION
EARTHS MANTLE
GOLD
CALIBRATION
EXPANSION
TRANSFORMATION
PEROVSKITE
PLATINUM
BOUNDARY

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@article{ffcb2e1cd83043ef82d42149f0d69434,

title = "Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale",

abstract = "The equation of state of cubic boron nitride (cBN) has been determined to a maximum temperature of 3300 K at a simultaneous static pressure of up to more than 70 GPa. Ab initio calculations to 80 GPa and 2000 K have also been performed. Our experimental data can be reconciled with theoretical results and with the known thermal expansion at 1 bar if we assume a small increase in pressure during heating relative to that measured at ambient temperature. The present data combined with the Raman measurements we presented earlier form the basis of a high-temperature pressure scale that is good to at least 3300 K.",

keywords = "DIAMOND-ANVIL CELL, V-T EQUATION, EARTHS MANTLE, GOLD, CALIBRATION, EXPANSION, TRANSFORMATION, PEROVSKITE, PLATINUM, BOUNDARY",

author = "Goncharov, {Alexander F.} and Crowhurst, {Jonathan C.} and Dewhurst, {John K.} and Sangeeta Sharma and Chrystele Sanloup and Eugene Gregoryanz and Nicolas Guignot and Mohamed Mezouar",

year = "2007",

month = jun,

doi = "10.1103/PhysRevB.75.224114",

language = "English",

volume = "75",

journal = "Physical review B",

issn = "1098-0121",

publisher = "American Physical Society",

number = "22",

}

TY - JOUR

T1 - Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale

AU - Goncharov, Alexander F.

AU - Crowhurst, Jonathan C.

AU - Dewhurst, John K.

AU - Sharma, Sangeeta

AU - Sanloup, Chrystele

AU - Gregoryanz, Eugene

AU - Guignot, Nicolas

AU - Mezouar, Mohamed

PY - 2007/6

Y1 - 2007/6

N2 - The equation of state of cubic boron nitride (cBN) has been determined to a maximum temperature of 3300 K at a simultaneous static pressure of up to more than 70 GPa. Ab initio calculations to 80 GPa and 2000 K have also been performed. Our experimental data can be reconciled with theoretical results and with the known thermal expansion at 1 bar if we assume a small increase in pressure during heating relative to that measured at ambient temperature. The present data combined with the Raman measurements we presented earlier form the basis of a high-temperature pressure scale that is good to at least 3300 K.

AB - The equation of state of cubic boron nitride (cBN) has been determined to a maximum temperature of 3300 K at a simultaneous static pressure of up to more than 70 GPa. Ab initio calculations to 80 GPa and 2000 K have also been performed. Our experimental data can be reconciled with theoretical results and with the known thermal expansion at 1 bar if we assume a small increase in pressure during heating relative to that measured at ambient temperature. The present data combined with the Raman measurements we presented earlier form the basis of a high-temperature pressure scale that is good to at least 3300 K.

KW - DIAMOND-ANVIL CELL

KW - V-T EQUATION

KW - EARTHS MANTLE

KW - GOLD

KW - CALIBRATION

KW - EXPANSION

KW - TRANSFORMATION

KW - PEROVSKITE

KW - PLATINUM

KW - BOUNDARY

U2 - 10.1103/PhysRevB.75.224114

DO - 10.1103/PhysRevB.75.224114

M3 - Article

SN - 1098-0121

VL - 75

JO - Physical review B

JF - Physical review B

IS - 22

M1 - 224114

ER -

Thermal equation of state of cubic boron nitride: Implications for a high-temperature pressure scale

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Keywords / Materials (for Non-textual outputs)

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