Synthesis, characterization, and dielectric properties of nanocrystalline Ba_(1-x)Pb_xZrO_3 (0 ≤ x ≤ 0.75) by polymeric citrate precursor route

摘要

Solid solutions of Ba_(1-x)Pb_xZrO_3 (0≤x≤ 0.75) have been synthesized successfully by polymeric citrate precursor method for the first time. The solid solutions were characterized by powder x-ray diffraction (XRD), scanning electron microscopy, transmission electron microscopy, and surface area studies. XRD studies reveal the monophasic nature of these highly crystalline nanoparticles (except few impurity of ZrO_2 in PbZrO_3). Lattice parameter of Ba_(1-x)Pb_xZrO_3 (0.20 ≤ x ≤ 0.75) decreases with increasing the Pb content. Dielectric properties of these nanoparticles were investigated as a function of frequency and temperature. The dielectric constant for x = 0.15 showed a maximum value of 75.5.