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Titolo:
Thermoelastic behaviour of hexagonal graphite-like boron nitride
Autore:
Le Godec, Y; Martinez-Garcia, D; Mezouar, M; Syfosse, G; Itie, JP; Besson, JM;
Indirizzi:
Univ Paris 06, UMR 7602, F-75252 Paris 05, France Univ Paris 06 Paris France 05 ris 06, UMR 7602, F-75252 Paris 05, France ICMUV, Ed Invest, Valencia 46100, Spain ICMUV Valencia Spain 46100ICMUV, Ed Invest, Valencia 46100, Spain European Synchrotron Radiat Facil, F-33804 Grenoble, France European Synchrotron Radiat Facil Grenoble France F-33804 enoble, France
Titolo Testata:
HIGH PRESSURE RESEARCH
fascicolo: 1, volume: 17, anno: 2000,
pagine: 35 - 46
SICI:
0895-7959(2000)17:1<35:TBOHGB>2.0.ZU;2-M
Fonte:
ISI
Lingua:
ENG
Soggetto:
HIGH-PRESSURES; TEMPERATURES; COMPRESSION; GPA;
Keywords:
boron nitride; high pressure; high temperature; equation of state; order parameter;
Tipo documento:
Article
Natura:
Periodico
Settore Disciplinare:
Physical, Chemical & Earth Sciences
Citazioni:
18
Recensione:
Indirizzi per estratti:
Indirizzo: Le Godec, Y Univ Paris 06, UMR 7602, F-75252 Paris 05, France Univ Paris 06 Paris France 05 7602, F-75252 Paris 05, France
Citazione:
Y. Le Godec et al., "Thermoelastic behaviour of hexagonal graphite-like boron nitride", HIGH PR RES, 17(1), 2000, pp. 35-46

Abstract

A synchrotron X-ray diffraction study on hexagonal graphite-like boron nitride (h-BN) was performed under high pressures and temperatures. From the measured P-V-T relation for h-BN (with a three-dimensional ordering parameter P-3 = 0.9) in the temperature range from 298 to 1273 K and up to 6.7 GPa,the thermoelastic parameters are derived by fitting a modified high temperature Birch-Murnaghan equation of stale. The results are: bulk modulus B-0[GPa] = 27.6 - 0.0081(T[K] - 298) and its pressure derivative B' = 10.5 + 0.0016(T[K] - 298). These values are for samples with P-3 = 0.9 and are quitedifferent for samples with different values of the order parameter. This parameter is shown to have a leading role in the determination of the thermoelastic properties of h-BN, which explains and reconciles the differences between previous results.

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Documento generato il 19/01/20 alle ore 09:50:26