Synthesis and characterization of MgCrxFe2-xO4 spinel ferrites produced by the ceramic technique

2^nd International Conference and Expo on Ceramics & Composite Materials

July 25-26, 2016 Berlin, Germany

A Rais, B Ouddane, M Moreau, K Taibi and A Addou

Universit�© de Mostaganem, Algeria
University of Science and Technology, France
University of Science and Technology Houari Boumediene, Algeria

Posters & Accepted Abstracts: J Material Sci Eng

Abstract :

Magnesium�Chromium spinel ferrites with the general formula MgCrxFe2-xO4 (0 � x � 1) were synthesized by the ceramic technique and characterized using X-ray diffraction, FT-Infra Red and Raman spectroscopy. From XRD diffraction patterns, the lattice parameters, bond length, crystallite size, density and porosity have been calculated and compared with those predicted theoretically. From FT-Infra Red band frequencies, the force constants Kt and Ko for tetrahedral (A) and octahedral (B) sites respectively, have been calculated and compared with the trend of bond lengths. For all compositions, Raman spectra show the five active modes A1g + E1g + 3 T2g of the motion of O2- ions and both the A-site and B-site ions. The trend of Infra Red and Raman frequencies with chromium content shows a blue shift for all modes consistent with the replacement of Fe3+ by lower mass Cr3+.

Biography :

Email: amrais@yahoo.com