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Thermal decomposition of borax

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Abstract

Thermal decomposition of borax has been researched by thermal, XRD and FTIR methods as well as SEM microscopy. Study have revealed that it proceeds according to the mechanism of internal reactions in the structure of the precursor as a medium.

The following stages of the process have been distinguished: (1) dehydration, (2) internal structure reconstitution—formation of tincalconite, (3) amorphization of crystal structure, (4) gradual dehydroxylation and crystallization of Na2O·2B2O3 inside the amorphous matrix.

Zusammenfassung

Mittels thermischen, XRD- und FTIR-Methoden als auch SEM Mikroskopie wurde die thermische Zersetzung von Borax untersucht. Die Untersuchung ergab, daß dies entsprechend dem Mechanismus interner Reaktionen in der Struktur des Präkursors als Medium erfolgt.

Folgende Stufen des Prozesses wurden unterschieden: (1) Dehydratation, (2) interne Strukturrückbildung zu Tinkalkonit, (3) Amorphisierung der Kristallstruktur, (4) stufenweise Dehydroxylierung und Kristallisation von Na2O2B2O3 innerhalb der amorphen Matrix.

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Authors and Affiliations

  1. University of Mining and Metallurgy, 30-059, Cracow, Poland

    I. Waclawska

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  1. I. Waclawska
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Waclawska, I. Thermal decomposition of borax. Journal of Thermal Analysis 43, 261–269 (1995). https://doi.org/10.1007/BF02635993

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