Open AccessSynthesis and Physico-chemical Characterization of Solid Solution (1-x)CCTO−xPbTiO3
Author(s) -
Meryem Slaoui,
Najwa Gouitaa,
Amina Lahrichi,
Ahmed Harrach,
M. Haddad,
T. L amcharfi
Publication year - 2021
Publication title -
asian journal of chemistry/asian journal of chemistry
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.145
H-Index - 34
eISSN - 0975-427X
pISSN - 0970-7077
DOI - 10.14233/ajchem.2021.23134
Subject(s) - tetragonal crystal system , rietveld refinement , solid solution , dielectric , raman spectroscopy , ceramic , phase (matter) , materials science , mineralogy , grain boundary , composite number , crystallite , chemistry , analytical chemistry (journal) , microstructure , composite material , crystallography , crystal structure , metallurgy , optics , physics , optoelectronics , organic chemistry , chromatography
The composite materials of (1-x)CaCu3Ti4O12, xPbTiO3((1-x)CCTO−xPT) were prepared by a modifiedsolid-state method in several steps. The Rietveld refinement indicates the formation of the pure cubicand tetragonal phases for calcium copper titanate (CCTO) and lead-titanate (PT) pure ceramics,respectively. While for CCTO-PT composites, the coexistence of the two cubic and tetragonal phaseswas detected with the space group Im-3 and P4mm, respectively. The Raman spectra confirmed thesephase formations. The SEM images indicated a change in grains shape from quadratic to semi-sphericalwith increases of PT contents and a reduce in average grains size with increase of PT content. Thedielectric measurements as function of temperature showed two anomalies which exhibit arelaxation-like phenomenon and a clear diffuseness behaviour for all the samples. In addition, theconductivity of these materials decreases and the resistance of grain boundaries was found to increasewith the increase of PT addition.