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- Title
Subsolidus phase relations of LiO-FeO-PO system and the solid solubility of LiFePO compounds under Ar/H atmosphere.
- Authors
Lin, Xinghao; Zhao, Yanming; Dong, Youzhong; Liang, Zhiyong; Yan, Danlin; Liu, Xudong; Kuang, Quan
- Abstract
The phase relation of Li2O-FeO-P2O5 ternary system under the 95 %Ar + 5 %H2 atmosphere has been systematically investigated by X-ray diffraction (XRD), and there exist 8 binary compounds, 4 ternary compounds, 2 two-phase regions, and 17 three-phase regions. No other new lithium ferrous phosphates can be existed in the Li2O-FeO-P2O5 ternary system under the 95 %Ar + 5 %H2 atmosphere. In this system, the Li1+xFe1-xPO4 solid solution phase with the homogeneous range of −0.15 ≤ x ≤ 0.06 is determined. Their corresponding lattice parameters are obtained by the refinement results, and the results show that the lattice parameters ( a, b, c, V) vary linearly with the increasing amount of excess Li-ion ( x > 0) or with the increasing amount of excess Fe-ion ( x < 0). The phase diagram determined in this paper can provide more information about the phase relation of Li2O-FeO-P2O5 ternary system and serve as a guide for the future investigation of lithium iron phosphates in this system.
- Subjects
SOLID solutions; MEASUREMENT of solubility; LITHIUM compounds; TERNARY phase diagrams; IRON oxides; PHOSPHATES; TERNARY alloys; X-ray diffraction
- Publication
Journal of Materials Science, 2015, Vol 50, Issue 1, p203
- ISSN
0022-2461
- Publication type
Article
- DOI
10.1007/s10853-014-8579-3