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Mesure des capacites calorifiques et des enthalpies de la solution solide AIN-SiC

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Abstract

The AlN-SiC solid solution was prepared by a reaction of powdered silicon, carbon and aluminium nitride at 2000°C. In the molar ratio range from 1 AlN -0 SiC to about 0.5 AlN -0.5 SiC high purity phases with wurtzite structure were obtained.

Heat capacities of some mixtures were measured at constant pressure between 313 and 533 K, and also the enthalpy changes between 298 and 453 K. It was observed that addition of small amounts of silicon carbide to aluminium nitride resultedC p and ΔH values close to those of silicon carbide.

Zusammenfassung

Durch die Reaktion von pulverisiertem Silizium, Kohlenstoff und Aluminiumnitrid bei 2000°C wurden AlN-SiC- Mischkristalle hergestellt. Im Molverhältnisbereich von 1 AlN - 0 SiC bis 0.5 A1N - 0.5 SiC erhielt man reine Phasen mit Wurtzit-Struktur. Im Temperaturbereich 313–533 K wurden Wärmekapazitäten bei konstantem Druck und im Temperaturbereich 298–453 K auch die Enthalpieänderungen einiger Gemische gemessen. Es konnte festgestellt werden, daß geringe Zusätze von Siliziumcarbid zu AluminiumnitridC p und H-Werte verursachen, die denen von Siliziumcarbid sehr nahe stehen.

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Avignon-Poquillon, L., Verdier, P., Laurent, Y. et al. Mesure des capacites calorifiques et des enthalpies de la solution solide AIN-SiC. Journal of Thermal Analysis 36, 2623–2633 (1990). https://doi.org/10.1007/BF01913659

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  • DOI: https://doi.org/10.1007/BF01913659

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