Title: "Synthesis and Study of Structure, Microstructure and Physical properties of the ceramic system of PZT 82.5/17.5 doped with Ta5+"
         

DOI: 10.15224/978-1-63248-084-2-43
Page(s): 66 - 69
Authors: TUAN NGUYEN DUY ANH

Abstract

In this paper, synthesis and study of structure, microstructure, dielectric, ferroelectric, and pyroelectric properties of the (1-x) PZT 82.5/17.5 xTa2O5, where x = 0; 0.5; 1; 1.5; 2% mol is presented. From experimental results, it was showed that the fabricated ferroelectric systems are of pure perovskite phase, rhombohedral structure, good microstructure, good dielectric, ferroelectric properties and strong pyroelectric effect. All samples are good ferroelectric ceramics such as the ceramic density ρ = 7.30 - 7.51(g/cm3), the dielectric constant ε = 226 - 314, the dielectric dissipation factor tgδ = 0.008 - 0.023, hysteresis loops of rectangular forms with the permanent polarizations Pr = 23.2 - 32.4 (C/cm2), electric coercive fields Ec = 6.8-8.9 (kV/cm), strong pyroelectric effect with maxima of pyroelectric coefficients γ = 6.1 - 12.4 (10-2.μC.cm-2.K-1), and pyroelectric coefficients at room temperature: 2.19 - 5.80 (10-3.μC.cm-2.K-1)