Synthesis and characterization of Fe 3+ -modified PLZT ferroelectrics

摘要: Fe3+-modified nanocrystalline PLZT, i.e., Pb0.92[La1−z Fe z ]0.08[Zr0.60Ti0.40]0.98O3 (PLFZT) (z=0.0, 0.3, 0.6, 0.9, 1) materials were synthesized by a high-temperature solid-state reaction technique. X-ray studies of the compounds confirmed formation single-phase, ultrafine (nano-sized) and homogeneous materials. Microstructural scanning electron microscopy (SEM) study shows uniform distribution smaller grains on surface samples. Detailed dielectric as function temperature (30–450 °C) show that broadening permittivity peak transition depends Fe3+-ion concentration. Analysis diffuseness (γ) broadened peaks gave its value between 1 2, indicating different degrees substitutional disorder in system. The increase Fe3+-substitution at La-site PLZT many interesting unusual relaxor behaviors compounds. T c (8/60/40) ferroelectric shifts towards higher region increasing Fe3+ variation d.c. a.c. electrical conductivity material with semiconducting behavior; hence can be used for some electronic devices.