Influence of substitutions on the structure, ionic conductivity, and phase transitions in the system of Na3Fe2(1-x)Sc2x(PO4)3 (0≤x≤0.06) solid solutions
The article presents data on the study of the effect of substitutions of M-cations in the system of Na3Fe2(1-x)Sc2x(PO4)3 solid solutions (in the concentration range 0 ≤ x ≤ 0.06) on the crystal structure, ionic conductivity, and also on the temperature of phase transitions Tα→β , Tβ→γ . It is shown...
| Main Authors: | , , , , |
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| Format: | Article |
| Language: | English |
| Published: |
L.N. Gumilyov Eurasian National University
2023-06-01
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| Series: | Eurasian Journal of Physics and Functional Materials |
| Subjects: | |
| Online Access: | https://www.ephys.kz/jour/article/view/523/217 |
| Summary: | The article presents data on the study of the effect of substitutions of M-cations in the system of Na3Fe2(1-x)Sc2x(PO4)3 solid solutions (in the concentration range 0 ≤ x ≤ 0.06) on the crystal structure, ionic conductivity, and also on the temperature of phase transitions Tα→β , Tβ→γ . It is shown that samples of Na3Fe2(1-x)Sc2x(PO4)3 (0 ≤ x ≤ 0.06) solid solutions are monoclinically distorted, and the structure parameters increase linearly with increasing dopant concentration. Moreover, in the studied samples of solid solutions, an increase in the conductivity of the α -phase and a decrease in the β - and γ -phases are observed, as well as a decrease in the temperatures Tα→β and Tβ→γ . It is concluded that these changes are associated with both local deformations of the anionic part of the crystalline structure{[Fe2(1-x)Sc2x(PO4)]3−}3∞ , and violation of the regularity of the crystal structure. |
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| ISSN: | 2522-9869 2616-8537 |