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Raman spectroscopy and ionic structure of Na 3 AlF 6-Al 2 O 3 melts
| Content Provider | Semantic Scholar |
|---|---|
| Author | Xian-Wei, Hu Jun-Yue, Qu Bing-Liang, Gao Zhong-Ning, Shi |
| Copyright Year | 2011 |
| Abstract | Raman spectrum of molten cryolite was recorded. Based on the new understanding of the scattering coefficients, contents of various structural entities in acidic NaF-AlF3 melts at 942−1 024 °C in previous research were reanalyzed. The new quantitative analysis results show that when cryolite ratio(CR) is less than 2, AlF4 is the dominant anion in the melts, and its mole fraction is about 0.70 for melts with CR=1.5 and 0.50 for melts with CR=2. When CR is more than 2.5, the mole fraction of AlF6 is relatively large, which is around 0.45 for melts with CR=2.5. Ionic structure of Na3AlF6-Al2O3 melts was investigated by UV-Raman spectroscopy. Octahedral AlF6 and tetrahedral AlF4 are proved to exist with possible partial replacement of F by O. Al2O2F4 with a large scattering coefficient also exists in the melts in which alumina concentration is more than 4% (mass fraction). The increase of temperature causes blue-shift of the bands in the Raman spectra. |
| File Format | PDF HTM / HTML |
| Alternate Webpage(s) | http://www.ysxbcn.com/down/upfile/soft/20110309/27-p402.pdf |
| Language | English |
| Access Restriction | Open |
| Content Type | Text |
| Resource Type | Article |
