An investigation of phase transformation of titania slag using microwave heating |
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| Authors: | Guo Chen Jin Chen Jinhui Peng |
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| Institution: | 1. Key Laboratory of Resource Clean Conversion in Ethnic Regions of Education Department of Yunnan, Joint Research Centre for International Cross-border Ethnic Regions Biomass Clean Utilization in Yunnan, Yunnan Minzu University, Kunming, P.R. China;2. Key Laboratory of Chemistry in Ethnic Medicinal Resources, State Ethnic Affairs Commission &3. Ministry of Education, Yunnan Minzu University, Kunming, P.R. Chinaguochen@kmust.edu.cn;5. Ministry of Education, Yunnan Minzu University, Kunming, P.R. China |
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| Abstract: | The influences of microwave heating on the phase transformation of titania slag were systematically investigated. The thermal stability, surface chemical functional groups and microstructure of the titania slag before and after microwave heating, at a temperature of 950?°C for 60 min, were also analyzed using thermogravimetry and differential thermal analysis (TG-DSC), Fourier transform infrared spectroscopy (FT-IR) spectrum and scanning electron microscope (SEM), respectively. The TG-DSC analysis revealed that the phase transformation of the titania slag from anatase TiO2 to rutile TiO2 occurred between 750 and 1000 °C. The FT-IR rustles demonstrate that the banding form of Ti4+, Ti3+ and Ti2+ ions and the methyl groups on the surface of the titania slag has changed and a new chemical bond Ti–OH was formed. The results of SEM showed that a large number of regulation rutile TiO2 crystals were found on the surface of the microwave-treated samples and the synthetic rutile has been synthesized successfully using microwave heating. |
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| Keywords: | microwave heating phase transformation structural performances titania slag rutile TiO2 |
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