Metall. Res. Technol.
Volume 114, Number 5, 2017
|Number of page(s)||6|
|Published online||25 August 2017|
Thermal decomposition mechanism of PrCl3·6H2O in air atmosphere
Metallurgy school of Northeastern University,
Shenyang, PR China
2 School of Energy and Environmental Engineering, Inner Mongolia University of Science and Technology, 014010 Baotou, PR China
* Corresponding author: email@example.com
Received in final form: 27 July 2017
Accepted: 28 July 2017
The formation of PrOCl is widely regarded as a result of PrCl3 hydrolysis; that is, PrCl3 + H2O = PrOCl + HCl. However, our study indicates that PrCl3 hydrolysis follows the schematic PrCl3 → Pr(OH)2Cl → PrOCl. In this study, several analytical techniques, such as X-ray diffraction, field-emission scanning electron microscopy (FESEM), thermogravimetry (TG)–differential thermal analysis (DTA) and TG–DTA–mass spectrometry, were employed to explore the mechanism underlying the thermal decomposition of PrCl3·6H2O at 25 – 1500 °C in air atmosphere. To examine the hydrolysis mechanism of PrCl3, the hydrolysis product was separated by continuous centrifugation. The phase composition and morphology of the intermediate compound were determined by XRD and FESEM, respectively. Finally, the dehydration schematic and oxidation behavior of PrCl3 were discussed according to the evolved gas composition.
Key words: PrCl3 / thermal decomposition / XRD / TG–DTA–MS
© EDP Sciences, 2017
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