Ionic conductivity of sodium–strontium germanate Na{sub 4}SrGe{sub 6}O{sub 15}

Journal Article · Wed Mar 15 00:00:00 EDT 2017 · Crystallography Reports

DOI:https://doi.org/10.1134/S1063774517020274· OSTI ID:22645193

Sorokin, N. I., E-mail: [e-mail] ^[1]

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1. Russian Academy of Sciences, Shubnikov Institute of Crystallography, Federal Scientific Research Centre “Crystallography and Photonics” (Russian Federation)

The electrical conductivity of sodium–strontium germanate Na{sub 4}SrGe{sub 6}O{sub 15} (sp. gr. P6{sub 3}/m) has been studied by impedance spectroscopy in the frequency range of 10{sup 2}–4 × 10{sup 4} Hz and a temperature range of 450–600 K. Na4SrGe6O15 crystals were obtained by hydrothermal technique in the Na{sub 2}O–SrO–GeO{sub 2}–H{sub 2}O system (temperature t = 300–600°C and pressure p = 1.4 × 10{sup 8} Pа in the dissolution zone). The ionic conductivity of ceramic Na{sub 4}SrGe{sub 6}O{sub 15} samples is σ = 2.2 × 10{sup –6} S/cm (at 573 K), the activation energy of Na{sup +} ion transfer is E{sub a} = 0.70 ± 0.03 eV.

• OSTI ID: 22645193
• Journal Information: Crystallography Reports, Vol. 62, Issue 2; Other Information: Copyright (c) 2017 Pleiades Publishing, Inc.; Country of input: International Atomic Energy Agency (IAEA); ISSN 1063-7745
• Country of Publication: United States
• Language: English

Related Subjects

75 CONDENSED MATTER PHYSICS
SUPERCONDUCTIVITY AND SUPERFLUIDITY
ACTIVATION ENERGY
CERAMICS
GERMANATES
GERMANIUM OXIDES
HEXAGONAL LATTICES
IONIC CONDUCTIVITY
SODIUM COMPOUNDS
STRONTIUM COMPOUNDS