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Investigation of reactions in solids by DTA

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Abstract

Reactions in mixtures of solid alkali metal sulphates with barium chloride were investigated by DTA. The decisive role of an intermediate liquid was demonstrated.

It was established that the application of DTA with simultaneous recording of electrical conductivity in the investigation of the mechanism of interaction of mechanical non-equilibrium mixtures of anhydrous salts leads to data on the transitory existence of a labile eutectic, which to a certain extent affects the course of the reactions of the mixtures of solids.

Résumé

On a suivi par ATD la réaction de mélanges de sulfates de métaux alcalins, à l'état solide, avec le chlorure de baryum et montré le rôle décisif d'une phase liquide intermédiaire.

L'emploi de l'ATD conjugué avec l'enregistrement simultané de la conductivité électrique a permis d'obtenir des données sur l'existence transitoire d'un eutectique labile, qui, dans une certaine mesure, peut jouer un rôle sur les réactions des mélanges de composés solides.

Zusammenfassung

Die Reaktion in den Mischungen fester Alkalimetallsulfate mit Bariumchlorid wurde an Hand der DTA studiert. Die entscheidende Rolle der intermediären Flüssigkeit in den geprüften Reaktionen wurde bewiesen.

Es wurde festgestellt, daß die Anwendung der DTA bei gleichzeitiger Registrierung der elektrischen Leitfähigkeit bei dem Studium des Wirkungsmechanismus mechanischer NichtGleichgewichtsmischungen nichtwäßriger Salze Angaben bezüglich eines labilen Eutektikums kurzer Lebensdauer ermöglicht, welches in gewissem Maße den Verlauf der Reaktionen von Festkörpermischungen beeinflußt.

Резюме

Методом ДТА исследов аны реакции в смесях твердых сульфатов ще лочных металлов с хлоридом б ария. Показана решающ ая роль промежуточных жидки х фаз. в изученных реакциях. Установлено, что изуч ая методом ДТА с одновременной з аписью электропроводности механизм взаимодейс твия в механических, неравн овесных смесях безводных солей, можн о получить данные о существовании в тече ние короткого промеж утка времени лабильной эв тектики, оказывающей определенное влияни е на ход реакции в смесях твердых веще ств.

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Authors and Affiliations

  1. V. I. Uljanov-Lenin Order Banner Kazan University, Kazan, USSR

    L. G. Berg, N. P. Burmistrova & N. I. Lisov

Authors
  1. L. G. Berg
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  2. N. P. Burmistrova
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  3. N. I. Lisov
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Berg, L.G., Burmistrova, N.P. & Lisov, N.I. Investigation of reactions in solids by DTA. Journal of Thermal Analysis 7, 111–117 (1975). https://doi.org/10.1007/BF01911630

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  • DOI: https://doi.org/10.1007/BF01911630

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