Internal friction phenomena in composites based on PZT-type ferroelectric powder and ferrites

Abstract

Abstract. The aim of the work was to determine the phenomena of internal friction (mechanical losses) occurring in ferroelectric-ferromagnetic composites created based on PZT-type ferroelectric powder and ferrite. The composites were obtained using ceramic powders -multi-component PZT-type solid solutions with ferroelectric properties. Their magnetic component included zinc-nickel powder Ni0.64Zn0.36Fe2O4. 30 × 10 × 1 mm 3 test specimens were obtained using free sintering. Temperature Q −1 (T ) and amplitude Q −1 (ε) internal friction dependencies were determined. Wide high temperature maxima were observed with regard to the internal friction temperature dependencies obtained for the tested specimens. The conducted measurements of amplitude (isothermal) dependencies of internal friction Q −1 (ε) for the tested composites have allowed for interpreting the previously observed maximum on the temperature dependencies of internal friction.

Elastic and Anelastic Properties of a Particulate Magnetoelectric Composite (x)Mn0.4Zn0.6Fe2O4–(1 − x)PbZr0.53Ti0.47O3

“…Today, there are many works devoted to the study of physical properties of particulate ME composites. They are mainly devoted to the research of ME, dielectric, electric, ferroelectric, magnetic, and other properties of composites over a wide temperature range, while the investigation of elastic and anelastic properties is undeservedly paid little attention despite the fact that the ME interaction between ferrimagnetic and ferroelectric components of composites is realized through elastic strains.…”