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Thermoanalytical study of the polymorphic transformations of wurtzitic boron nitride modification into graphite-like ones

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Abstract

The polymorphic transformations of wurtzitic modification of boron nitride into graphite-like ones have been studied using DSC, inverse drop-calorimetry and dilatometry over the temperature range of 500 to 1400 K. The transformation enthalpies at 1380 K were determined to be +14±2 kJ/mole and +17±3 kJ/mole for wBN→hBN and wBN→rBN transformations, respectively.

Zusammenfassung

Mittels DSC, inverser Dropkalorimetrie und Dilatometrie im Temperaturbereich von 500 bis 1400 K wurden die polymorphen Umwandlungen der Wurtzit-Modifikation von Bornitrid in die Graphit-Modifikation untersucht. Die Umwandlungsenthalpien bei 1380 K für die Umwandlungen wBN→hBN und wBN→rBN wurden mit +14±2 kJ/mol und mit +17±3 kJ/mol bestimmt.

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  1. V. Bakul Institute for Superhard Materials of the Ukrainian Academy of Sciences, 254153, Kiev, Ukraine

    V. L. Solozhenko

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  1. V. L. Solozhenko
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Solozhenko, V.L. Thermoanalytical study of the polymorphic transformations of wurtzitic boron nitride modification into graphite-like ones. Journal of Thermal Analysis 44, 97–103 (1995). https://doi.org/10.1007/BF02547138

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  • DOI: https://doi.org/10.1007/BF02547138

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