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

被引：74

作者：

Goncharov, Alexander F.

Crowhurst, Jonathan C.

Dewhurst, John K.

Sharma, Sangeeta

Sanloup, Chrystele

Gregoryanz, Eugene

Guignot, Nicolas

Mezouar, Mohamed

机构：

[1] Carnegie Inst Sci, Geophys Lab, Washington, DC 20015 USA

[2] Lawrence Livermore Natl Lab, Livermore, CA 94551 USA

[3] Univ Edinburgh, Sch Chem, Edinburgh, Midlothian, Scotland

[4] Free Univ Berlin, Inst Theoret Phys, D-1000 Berlin, Germany

[5] Max Planck Gesell, Fritz Haber Inst, Berlin, Germany

[6] Univ Paris 06, Paris, France

[7] Inst Phys Globe Paris, Paris, France

[8] Univ Edinburgh, Sch Phys, Edinburgh, Midlothian, Scotland

[9] Univ Edinburgh, Ctr Sci Extreme Condit, Edinburgh, Midlothian, Scotland

[10] European Synchrotron Radiat Facil, F-38043 Grenoble, France

来源：

PHYSICAL REVIEW B | 2007年 / 75卷 / 22期

关键词：

D O I：

10.1103/PhysRevB.75.224114

中图分类号：

T [工业技术];

学科分类号：

08 ;

摘要：

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.

引用

页数：6

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[1] Equation of state of water based on speeds of sound measured in the diamond-anvil cell [J].