Synthesis of thorium tetrafluoride (ThF 4 ) by ammonium hydrogen difluoride (NH 4 HF 2 )

Che Nor Aniza Che Zainul Bahri, Aznan Fazli Ismail, Amran Ab. Majid

Research output: Contribution to journalArticle

Abstract

The present study aims to investigate the fluorination of thorium oxide (ThO 2 ) by ammonium hydrogen difluoride (NH 4 HF 2 ). Fluorination was performed at room temperature by mixing ThO 2 and NH 4 HF 2 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 ThF 4 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 ThO 2 at room temperature. The optimum molar ratio in synthesizing ammonium thorium fluoride was 1.0:5.5 (ThO 2 :NH 4 HF 2 ) with 5 days reaction time. In addition, the heating of ammonium thorium fluoride at 450 °C was sufficient to produce ThF 4 . Overall, this study proved that NH 4 HF 2 is one of the fluorination agents that is capable of synthesizing ThF 4 .

Original languageEnglish
Pages (from-to)792-799
Number of pages8
JournalNuclear Engineering and Technology
Volume51
Issue number3
DOIs
Publication statusPublished - 1 Jun 2019

Fingerprint

Fluorination
Thorium
Hydrogen
Heating
X ray diffraction
Electron spectroscopy
X ray spectroscopy
Flow of gases
Argon
Scanning
Temperature
Oxides

Keywords

  • Ammonium hydrogen difluoride
  • Ammonium thorium fluoride
  • Thorium oxide
  • Thorium tetrafluoride

ASJC Scopus subject areas

  • Nuclear Energy and Engineering

Cite this

Synthesis of thorium tetrafluoride (ThF 4 ) by ammonium hydrogen difluoride (NH 4 HF 2 ) . / Che Zainul Bahri, Che Nor Aniza; Ismail, Aznan Fazli; Ab. Majid, Amran.

In: Nuclear Engineering and Technology, Vol. 51, No. 3, 01.06.2019, p. 792-799.

Research output: Contribution to journalArticle

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