Ultrasonic Characterization of Co-Additives Effects on Elastic Moduli and Acoustic Properties of Li_1-xCo_xFe₂O₄

Abstract:

Acoustic microscopes can be used to measure Rayleigh and longitudinal wave velocities in a specimen at microscopic resolution. These velocities are deduced from the analysis of the so-called acoustic signatures or V(z) curves. Such curves are obtained by recording the output signal, V, as the specimen is defocused along the z axis of the lens. In this context, we investigate Co-Additives effects on reflectance functions, R(θ) and acoustic signatures. The elastic properties of Lithium cobalt mixed ferrites of different compositions from the experimentally and simulation observed that the values of longitudinal wave velocities vary from 5072 m/s to 6833 m/s whereas transverse velocities from 3084 m/s to 4105 m/s. The variation of the elastic moduli with composition was interpreted in terms of the binding forces between the atoms.

• Periodical: Advanced Materials Research (Volume 811)
• Pages: 77-82
• DOI: https://doi.org/10.4028/www.scientific.net/AMR.811.77
• Online since: September 2013
• Authors: Ibrahim Al-Suraihy, Abdellaziz Doghmane, Zahia Hadjoub
• Keywords: Acoustic Signature, Additive, Mechanical Properties Li_xCo_xFe₂O₄, SAW Velocities

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