TY  - JOUR
TI  - Structural and impedance studies of copper-enriched (Cu0.75Ag0.25)7SiS5I-based ceramics
AU  - I.P. Studenyak
AU  - A.I. Pogodin
AU  - I.A. Shender
AU  - S.M. Bereznyuk
AU  - M.J. Filep
AU  - O.P. Kokhan
AU  - P. Kopcansky
T2  - Semiconductor Physics, Quantum Electronics & Optoelectronics
JO  - Semiconductor Physics, Quantum Electronics & Optoelectronics
VL  - 23
IS  - 3
SP  - 260
EP  - 266
PY  - 2020
DO  - 10.15407/spqeo23.03.260
UR  - https://doi.org/10.15407/spqeo23.03.260
AB  - Copper-enriched (Cu0.75Ag0.25)7SiS5I-based ceramics were prepared from the micro- and nanopowders by pressing and sintering under developed technological conditions. Structural studies at different process step stages of ceramic samples preparation were performed using the XRD technique and microstructural analysis. The frequency and temperature dependences of the total electrical conductivity for (Cu0.75Ag0.25)7SiS5I-based ceramics were investigated by the impedance measurements. From the Nyquist plots, by using the electrode equivalent circuits the ionic and electronic components of the total electrical conductivity were determined. It has been shown that both ionic and electronic conductivity nonlinearly depend on the average crystallites size of (Cu0.75Ag0.25)7SiS5I-based ceramics.
KW  - argyrodite
KW  - superionic conductor
KW  - ceramic
KW  - ionic conductivity
KW  - activation energy
ER  -