Equation of state of wurtzitic boron nitride to 66 GPa
The compressibility of wurtzitic boron nitride (wBN) taken in mixture with cubic BN has been measured at room temperature up to 66 GPa, using a diamond anvil cell and powder diffraction of synchrotron radiation. From the obtained pressure-volume relation for wBN the isothermal bulk modulus of B0=375...
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| Veröffentlicht in: | Applied physics letters 1998-04, Vol.72 (14), p.1691-1693 |
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| Hauptverfasser: | , , , |
| Format: | Artikel |
| Sprache: | eng |
| Online-Zugang: | Volltext |
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| Zusammenfassung: | The compressibility of wurtzitic boron nitride (wBN) taken in mixture with cubic BN has been measured at room temperature up to 66 GPa, using a diamond anvil cell and powder diffraction of synchrotron radiation. From the obtained pressure-volume relation for wBN the isothermal bulk modulus of B0=375±9 GPa and its first pressure derivative of dB0/dp=4.9±0.7 have been calculated indicating that this phase has nearly the same compressibility as cBN (B0=377±4 GPa and dB0/dp=4.1±0.2). Thermodynamic calculations using our findings on wBN equation of state have shown that wurtzitic boron nitride is metastable over the whole ranges of pressures and temperatures. |
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| ISSN: | 0003-6951 1077-3118 |
| DOI: | 10.1063/1.121186 |