Add time:08/30/2019         Source:sciencedirect.com

The present study aims to investigate the fluorination of thorium oxide (ThO2) by Ammonium hydrogen difluoride (cas 1341-49-7) (NH4HF2). Fluorination was performed at room temperature by mixing ThO2 and NH4HF2 at different molar ratios, which was then left to react for 20 days. Next, the mixtures were analyzed using X-ray diffraction (XRD) at the intervals of 5, 10, 15, and 20 days, followed by the heating of the mixtures at 450–750 °C with argon gas flow. The characterization of ThF4 was established using X-ray diffraction (XRD) and scanning electron microscopy–dispersion X-ray spectroscopy (SEM–EDX). In this study, ammonium thorium fluoride was synthesized through the fluorination of ThO2 at room temperature. The optimum molar ratio in synthesizing ammonium thorium fluoride was 1.0:5.5 (ThO2:NH4HF2) with 5 days reaction time. In addition, the heating of ammonium thorium fluoride at 450 °C was sufficient to produce ThF4. Overall, this study proved that NH4HF2 is one of the fluorination agents that is capable of synthesizing ThF4.

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