Abstract
In this paper, the phase transition of titanium slag under microwave heating observed through electron microscopy was systematically investigated. The phase identification and transformation as well as the morphology of samples before and after each treatment were characterized using X-ray powder diffraction (XRD), Fouriertransform infrared spectroscopy, Raman spectroscopy and scanning electron microscopy (SEM). The XRD confirmed that sodium salt roasting could modify the phase composition of titanium slag. The microwave roasting in the presence of sodium salt increased the rutile TiO2 with high crystallinity after acid leaching. The Raman spectroscopy demonstrated the phase transition of titanium slag from anosovite to rutile TiO2 after a series of treatments, and the SEM analyses showed that the surface of calcined products grew plenty of rutile TiO2 with typical characteristics. The results indicate a successful process for an effective and efficient way for the utilization of both titanium slag and preparation of rutile TiO2.
Original language | English (US) |
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Article number | 171858 |
Journal | Royal Society Open Science |
Volume | 5 |
Issue number | 6 |
DOIs | |
State | Published - Jun 6 2018 |
Bibliographical note
Funding Information:Financial support from the National Scientific Foundation of China (Nos. 51504110, 51404114), the China Postdoctoral Science Foundation (No. 2017M623012), the Open Research Fund of State Key Laboratory of Multiphase Complex Systems (No. MPCS-2017-D-05) and the China Postdoctoral Science Foundation of Sichuan Province is sincerely acknowledged.
Publisher Copyright:
© 2018 The Authors.
Keywords
- Electron microscopy
- Microwave heating
- Phase transition
- Rutile TiO
- Titanium slag