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Thermochemical studies on Bi4Ge3O12 and Bi4Ti3O12 single crystals

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Abstract

The specific heat values of Bi4Ge3O12 and Bi4Ti3O12 single crystals have been studied using a DSC instrument in the temperature range from 323 to 1273 K. The temperature range at which the anomaly associated with transition from polarized to non-polarized phase in Bi4Ti3O12 occurred, has been estimated using the shape of the Bi4Ge3O12 heat capacity curve as a “normal” one. The heat effect and the entropy change of the transition were evaluated.

Zusammenfassung

Mittels DSC wurde im Bereich 323 bis 1273 K die spezifische Wärme von Bi4Ge3O12- und Bi4Ti3O12-Einkristallen untersucht. Unter Zuhilfenahme des “normalen” Wärmekapazitätskurvenverlaufes für Bi4Ge3O12 wurde derjenige Temperaturbereich bestimmt, in dem in Bi4Ti3O12 die anomale Umwandlung von einer polarisierten in eine unpolarisierte Phase verläuft. Wärmeeffekt und Entropieänderung für diese Umwandlung wurden ermittelt.

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Authors and Affiliations

  1. Kurnakov Institute of General and Inorganic Chemistry, Academy of Sciences of Russia, Moscow, Russia

    G. S. Suleimenova & V. M. Skorikov

Authors
  1. G. S. Suleimenova
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  2. V. M. Skorikov
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Additional information

The authors thank Ph. D. Yu. F. Kargin and A. S. Kalutskov for providing them with single crystals for study.

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Suleimenova, G.S., Skorikov, V.M. Thermochemical studies on Bi4Ge3O12 and Bi4Ti3O12 single crystals. Journal of Thermal Analysis 38, 1251–1256 (1992). https://doi.org/10.1007/BF01979184

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  • DOI: https://doi.org/10.1007/BF01979184

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