Dielectric and ferroelectric properties of fine grains Pb(In 1/2Nb 1/2)O 3–PbTiO 3 ceramics

Abstract

The dielectric and ferroelectric properties of (1 − x)Pb(In 1/2Nb 1/2)O 3– xPbTiO 3 (when x = 0.1, 0.2, 0.3, 0.4, and 0.5) ceramics prepared by an oxide-mixing method via a vibro-milling technique were investigated. Fine grains ceramics were achieved with average grain size of 1–2 μm, indicating advantage of the vibro-milling technique used. While PIN ceramic exhibited relaxor behavior, the dielectric properties of PIN–PT ceramics showed a mixed relaxor and normal ferroelectric behavior, with more normal ferroelectric behavior observed with increasing PT content. In addition, the ferroelectric properties of the ceramics in PIN–PT system changed from the relaxor ferroelectric behavior in PIN ceramic to the normal ferroelectric behavior in PIN–PT ceramics. These results clearly show the significance of the added PT in reducing the relaxor ferroelectric behavior in PIN ceramic. Finally, the existence of the MPB composition between x = 0.3 and 0.4 has been confirmed from the XRD analysis, and dielectric and ferroelectric properties measurements.