Phase Stability and Ionic Conductivity of Solid Solutions with NASICON Structure |
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| Authors: | Andrey Novoselov Mariya Zhuravleva Ruslan Zakalyukin Valeriy Fomichev Galina Zimina |
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| Affiliation: | Department of Chemistry and Chemical Engineering for Rare and Dispersed Elements, Lomonosov Moscow State Academy of Fine Chemical Technology, Moscow 119571, Russian Federation |
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| Abstract: | Formation of heterovalent Zr-substituted solid solutions (up to 7 mol%) for Yb3+ in Na6Yb3(PO4)5 and LiNa5Yb3(PO4)5 complex phosphates was studied by ceramic technique at 950°C. Obtained samples were investigated with X-ray powder diffraction, infrared, and impedance spectroscopy. Zr-substituted (7 mol%) Na6Yb3(PO4)5 has ionic conductivity of 1.6·10?2 S/cm at 300°C and 4.8·10?5 S/cm at room temperature. An updated version of phase diagram for ScPO4–Na3PO4–Li3PO4 quasi-ternary system was provided. |
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