Electrical and dielectrical properties of composites based on (Ag1–xCux)7GeS5I mixed crystals

Abstract

Polymer composites were prepared from (Ag 1–x Cu x ) 7 GeS 5 I mixed crystals grown using Bridgman–Stockbarger method. The impedance measurements were performed at room temperature in the frequency range 10 –3 –2·10 6 Hz. The frequency dependences of electrical conductivity and dielectric permittivity for composites based on (Ag 1–x Cu x ) 7 GeS 5 I mixed crystals were obtained. The Nyquist plots for (Ag 1–x Cu x ) 7 GeS 5 I-based composite has been analyzed. The influence of cation Ag→Cu substitution on electrical conductivity of composites based on (Ag 1–x Cu x ) 7 GeS 5 I mixed crystals has been studied.

Keywords

• mixed crystals
• composites
• cation substitution
• impedance measurements
• electrical conductivity
• dielectric permittivity