Phase structure, microstructure, and dielectric properties of (1–x)Pb(Zr_0.50 Ti_0.50)O₃–xBa(W_2/3 Mn_1/3)O₃ ceramics

Abstract

Ceramics in (1-x)PZT–xBWM system with formula (1-x)Pb(Zr_0.50 Ti_0.50)O₃–xBa(W_2/3 Mn_1/3)O₃, where x = 0.0025–0.01, were prepared by a normal solid-state method and sintered at 1150 °C. The crystal structure, microstructure and dielectric properties of the ceramics were investigated via X-ray diffraction, scanning electron microscopy and dielectric spectroscopy. X-ray diffraction results demonstrate that all the samples lie within the morphotropic phase boundary region. A microstructure with mean grains sizes of 1.71–2.11 μm were found and the apparent density of 7.59–7.75 g/cm³. The Curie temperature (T_c) decreases with increasing BWM content. The room temperature dielectric constant shows a decreasing trend while loss improves with BWM doping.

Keywords:

• Dielectric
• XRD
• solid-state reaction
• scanning electron microscopy