Phase-structural transformation of erbium trihydride studied by thermal desorption spectroscopy |
| |
| Affiliation: | 1. Faculty of Materials Science and Chemistry, China University of Geosciences, Wuhan 430074, China;2. Department of Radiology, Xinqiao Hospital, Army Medical University, Chongqing 400037, China;1. Departamento de Electricidad, Universidad Tecnológica Metropolitana, Santiago 7750000, Chile;2. Instituto de Investigacion Multidisciplinario en Ciencia y Tecnologia, Universidad de La Serena, La Serena 1720170, Chile;1. School of Electronic and Information Engineering, Shanghai University of Electric Power, Shanghai, 201306, China;2. Department of Electrical Engineering, School of Electronic Information and Electrical Engineering, Shanghai Jiao Tong University, 200240 Shanghai, China;3. Shanghai Xinwei Semiconductor Co. Ltd, China;1. State Key Laboratory of Information Photonics and Optical Communications and School of Electronic Engineering, Beijing University of Posts and Telecommunications, Beijing, 100876, China;2. School of Science, Xi''an University of Architecture and Technology, Xi''an 710055, China;3. Shandong Semiconductor Materials and Optoelectronic Information Technology Innovation Center, Ludong University, Yantai 264025, China;4. School of Information and Communications Technology, Beijing University of Posts and Telecommunications, Beijing, 100876, China;1. Department of Chemistry, Northeast Agricultural University, Harbin, Heilongjiang, 150030, China;2. College of Chemistry, Chemical Engineering and Resource Utilization, Northeast Forestry University, Harbin 150040, China |
| |
| Abstract: | Thermal desorption behaviours of erbium trihydride (ErH3) powders were studied using simultaneous thermogravimetry and thermal desorption spectroscopy (TG-TDS) method. The crystal structures and chemical compositions of the samples were investigated by X-ray diffraction analysis (XRD) and X-ray photoelectron spectroscopy (XPS), respectively. Two-peak structures were observed in the hydrogen desorption spectra and the corresponding activation energies were determined to be 160.7 and 212.3 kJ/mol, respectively. The phase transformation sequences during thermal desorption process were established by combining the changing trends in the temperature/hydrogen content with the Er–H phase diagram. It was established that the low-temperature and high-temperature peaks were related to the β + γ → β and α + β → α phase transformation steps, respectively. The origins of the observed TDS peaks and shoulders were attributed to the equilibrium hydrogen pressures of the phase regions that the decomposition reaction passed through. |
| |
| Keywords: | Erbium hydride Thermal desorption spectroscopy Phase transformation Hydrogen desorption Phase diagram |
| 本文献已被 ScienceDirect 等数据库收录！ |
|
