| Article ID | Journal | Published Year | Pages | File Type |
|---|---|---|---|---|
| 1314736 | Journal of Fluorine Chemistry | 2012 | 4 Pages |
The fluorination of ZrO2 and HfO2 and the understanding of the fundamental chemistry of formation of ZrF4 and HfF4 in a fluorine atmosphere were investigated using a thermobalance. The fluorination of these species was performed to understand the chemical behavior of the tetrafluoride species of these metals. Thermogravimetrical analysis indicated that the formation of ZrF4/HfF4 is via the oxyfluorides. X-ray powder diffraction was used to confirm the results.
Graphical abstractThermogravimetric investigation of the fluorination of ZrO2 and HfO2 using fluorine gas.Figure optionsDownload full-size imageDownload as PowerPoint slideHighlights► ZrO2 and HfO2 were fluorinated using a thermobalance in a F2 atmosphere. ► Dynamic TG runs showed the possible formation of stable intermediates. ► Isothermal runs confirmed that the intermediate formed is temperature dependent. ► XRD confirmed in some cases that the intermediates are oxyfluorides. ► XRD confirmed the formation of ZrF4 and HfF4 at 525 and 580 °C, respectively.
