Effect of Ti~(4+) substitution in copper ferrite: an analogous study

摘要

Two systems of copper ferrites, CU_(1-x)Ti_xFe_2O_4 (system 1) and Cu_(1+x)Ti_xFe_(2-2x)O_4 (system 2), were analogously investigated for 0 ≤ x ≤ 0.4. In addition to X-ray and IR spectra investigations, the study of the microstructure, microhardness and the d.c. conductivity of the two systems was achieved. In terms of the X-ray data and the IR spectra, two different cation distributions were proposed for system 1 and system 2, respectively. For system 1, the lattice constant was found to be independent of x, while it increases with x for system 2. A drop in the grain diameter from 45 μm to about 16 μm is associated with a change of x from 0 to 0.4 for system 1, whilst the grain diameter for system 2 seems to be independent of composition. The general trends for the microhardness and the d.c. conductivity were also taken into consideration.