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Synthesis Of Thorium Tetrafluoride (ThF4) By Ammonium Hydrogen Difluoride (NH4HF2)
Che Nor Aniza Che Zainul Bahri,Aznan Fazli Ismail,Amran Ab. Majid 한국원자력학회 2019 Nuclear Engineering and Technology Vol.51 No.3
The present study aims to investigate the fluorination of thorium oxide (ThO2) by ammonium hydrogendifluoride (NH4HF2). Fluorination was performed at room temperature by mixing ThO2 and NH4HF2 atdifferent molar ratios, which was then left to react for 20 days. Next, the mixtures were analyzed using Xraydiffraction (XRD) at the intervals of 5, 10, 15, and 20 days, followed by the heating of the mixtures at450e750 C with argon gas flow. The characterization of ThF4 was established using X-ray diffraction(XRD) and scanning electron microscopyedispersion X-ray spectroscopy (SEMeEDX). In this study,ammonium thorium fluoride was synthesized through the fluorination of ThO2 at room temperature. Theoptimum molar ratio in synthesizing ammonium thorium fluoride was 1.0:5.5 (ThO2:NH4HF2) with 5days reaction time. In addition, the heating of ammonium thorium fluoride at 450 C was sufficient toproduce ThF4. Overall, this study proved that NH4HF2 is one of the fluorination agents that is capable ofsynthesizing ThF4