Composition Dependence of the Elastic Moduli of Mixed Lithium—Zinc Ferrites

Abstract

Mixed Li-Zn ferrites are prepared by the well-known double sintering ceramic technique. From the X-ray diffraction studies lattice parameters are calculated and their variation with composition is explained on the basis of the tetrahedral ionic radius. The bulk density of the specimens are determined by the hydrostatic method. The ultrasonic compressional (6) and shear (V,) velocities of mixed Li-Zn ferrites are measured at room temperature using the ultrasonic pulse transmission technique. The elastic moduli of the specimens are computed and corrected to zero porosity. The variation of elastic moduli with composition is interpreted in terms of binding forces between the atoms. 28 physica (a) 136/2

Investigation of the structural, optical, elastic and electrical properties of spinel LiZn2Fe3O8 nanoparticles annealed at two distinct temperatures

“…This value of the Poisson ratio is in good agreement with other spinel ferrites. 29,36,37 The calculated values of G, s, E, V t , V l and V m for the two samples are consistent with those obtained from the ultrasonic pulse transmission (UPT) technique [39][40][41] and for various ferrite spinels using FTIR data. 42,43 In addition, unless corrected to a void-free state, the measured elastic moduli are not signicant.…”

Electrical Properties of Cadmium Substitution in Nickel Ferrites

“…Table 3 gives the experimental values of electrical conductivity and Seebeck coefficient values at room temperature. The carrier concentration for these ferrites was calculated using the formula given by morin and gebella [12].…”