Механизм электропереноса в суперионном проводнике Sr-=SUB=-0.7-=/SUB=-La-=SUB=-0.15-=/SUB=-Lu-=SUB=-0.15-=/SUB=-F-=SUB=-2.3-=/SUB=- со структурой флюорита

نویسندگان

چکیده

The ionic conductivity of the superionic conductor Sr0.7La0.15Lu0.15F2.3 with fluorite-type structure (type CaF2, sp. gr. Fm-3m) had measured by impedance spectroscopy in temperature range 385–794 K. Bulk crystals a three-component solid solution (lattice parameter = 5.7726(1) A) obtained from melt directed crystallization technique. Temperature dependence σdc(T) satisfies Arrhenius–Frenkel equation activation enthalpy electrical Hσ 0.706 ± 0.05 eV. value σdc is 1.5 10–5 S/cm at 500 Based on analysis electrophysical and structural studies solutions SrF2–LaF3 SrF2–LuF3 systems, microscopic model ion transport crystal was proposed. concentration mobility charge carriers were calculated: nmob 7.8 × 1020 cm–3 μmob 1.2 10–7 cm2/Vs 500K.

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ژورنال

عنوان ژورنال: Fizika tverdogo tela

سال: 2023

ISSN: ['0367-3294', '1726-7498']

DOI: https://doi.org/10.21883/ftt.2023.01.53928.467