Abstract :
The elastic properties of CdxNi1–xFe2O4
(x = 0.2, 0.4, 0.6 and 0.8) spinel ferrite system synthesized
by wet-chemical technique, have been studied by
infra-red spectroscopy and X-ray diffraction pattern
analysis before (W) and after high temperature
annealing (AW). The average particle size for wetsamples
was within the range 4–5 nm, which is much
lower than the average particle size found for AW
samples ( 85 nm). The force constants for tetrahedral
and octahedral sites determined by infrared spectral
analysis, lattice constant and X-ray density values by
X-ray diffraction pattern analysis; have been used to
calculate elastic constants. The elastic moduli for
W-samples are found to be larger as compared to
AW samples, which are explained on the basis of grain
size reduction effect. The average crystallite size
calculated from elastic data is in agreement to that
determined from X-ray diffraction data analysis.
