Ionic conductivity of apatite-type solid electrolyte ceramics Ca2−xBaxLa4Bi4(SiO4)6O2 (0≤x≤2)
Source abstract
Abstract
A complex impedance of oxyapatites Ca2-xBaxLa 4Bi4(SiO4)6O2 (0≤x≤2) prepared by solid state reaction has been investigated. The formation of apatites has been checked by X-ray diffraction, FTIR, Raman and 29Si MAS-NMR techniques. The electric impedance data indicate that relaxation phenomena are strongly dependent on temperature in the 923-1048 K range. The bulk resistance decreases with increasing temperature, showing a typical negative temperature coefficient of resistance (NTCR). ac-Conductivity measurements have been performed on a wide range of frequencies and temperatures. The complex modulus plots have confirmed the presence of bulk contributions. The complex impedance analysis suggests the presence of non-Debye relaxations that would be associated with correlation on ions motion. © 2013 Elsevier Ltd and Techna Group S.r.l.
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Research context
OpenAlex topics: Ferroelectric and Piezoelectric Materials · Magnetic and transport properties of perovskites and related materials · Thermal Expansion and Ionic Conductivity
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