Science of Sintering 2021 Volume 53, Issue 4, Pages: 519-534
https://doi.org/10.2298/SOS2104519K
Full text ( 1225 KB)
Cited by
Impedance spectroscopy studies on steatite with B2O3 ceramics materials from algerian palygorskite
Khalfaoui K. (Research Unit Materials, Processes and Environment (UR-MPE), Faculty of Technology, University M’Hamed Bougara, Boumerdes, Algeria), k.khalfaoui@univ-boumerdes.dz
Boumchedda K. (Research Unit Materials, Processes and Environment (UR-MPE), Faculty of Technology, University M’Hamed Bougara, Boumerdes, Algeria)
Chaouchi A. (Laboratory of Applied Chemistry and Chemical Engineering, Mouloud Mammeri University, Tizi-Ouzou, Algeria)
Saidi M. (Laboratory of Applied Chemistry and Chemical Engineering, Mouloud Mammeri University, Tizi-Ouzou, Algeria)
Lamrani N. (Laboratory of Applied Chemistry and Chemical Engineering, Mouloud Mammeri University, Tizi-Ouzou, Algeria)
Djafar R. (Research Unit Materials, Processes and Environment (UR-MPE), Faculty of Technology, University M’Hamed Bougara, Boumerdes, Algeria)
B2O3 was used to reduce the sintering temperature of steatite (named MSB)
dielectric ceramics. Electrical properties of this composition have been
studied using impedance spectroscopic method to get better understanding of
the electrical conduction, dielectric relaxation mechanism, and
microstructure-electrical properties relationship of the materials as a
function of temperature and frequency. These samples were prepared by a
solid-state reaction technique and their single phase formation was
confirmed by the X-ray diffraction technique. Dielectric and complex
impedance spectroscopic studies were carried out in a wide frequency
(102-106 Hz) and temperature (30-500°C) range. The dielectric constants
decrease with increasing frequency for each sample, and then stabilize at
frequencies lower than 100 kHz. The dielectric constant increases with the
addition of B2O3. The nature of frequency dependence of ac conductivity of
MSB follows the Jonscher power law and calculated DC conductivity follows
Arrhinius behavior. The Nyquist plot (Z″ vs Z') revealed the presence only
of the grain boundary effect from 350°C onwards. The occurrence of single
arc in the complex modulus spectrum of MSB compositions confirms the
single-phase characteristics, and also confirms the presence of non-Debye
type of multiple relaxations in the material.
Keywords: Palygorskite, Steatite, B2O3, Dielectric properties, AC impedance spectroscopy