Open AccessCharacterizing temperature dependent complex electrical impedance analysis of LaFe1−xZnxO3(x= 0.03, 0.05, and 0.07) ceramics
Author(s) -
Djoko Triyono,
F. Fajriyani,
U. Hanifah,
R. A. Rafsanjani
Publication year - 2020
Publication title -
journal of advanced dielectrics
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.38
H-Index - 13
eISSN - 2010-135X
pISSN - 2010-1368
DOI - 10.1142/s2010135x20500319
Subject(s) - materials science , grain boundary , ceramic , annealing (glass) , electrical resistivity and conductivity , orthorhombic crystal system , perovskite (structure) , condensed matter physics , sintering , grain size , analytical chemistry (journal) , microstructure , crystallography , crystal structure , composite material , chemistry , physics , chromatography , quantum mechanics
LaFe[Formula: see text][Formula: see text]O 3 ([Formula: see text] = 0.03, 0.05, and 0.07) ceramics were prepared in two steps: preparation of the powder form by a sol–gel method followed by sintering-annealing treatments to form the bulk-phase. X-ray diffraction analysis revealed that all ceramics were crystallized in the orthorhombic perovskite structure with Pbnm symmetry. Grain size distribution and morphological characteristics were investigated by scanning electron microscopy. Specific surface area was analyzed through BET–BJH methods. Electrical impedance analysis was investigated as a function of frequency at various temperatures. It was found that the electrical behavior is dominated by grain boundary contribution, i.e., electrical conductivity. The frequency dependence of the complex conductivity was analyzed through Joncher’s power law and the dominance of translational motion with a sudden hopping mechanism in the electrical conduction mechanism increased with increasing Zn content. Activation energy decreased with increasing Zn content.