Abstract
In this study, bismuth niobium titanate Bi3.99Ti2.97Nb0.03O12; BNbT which is known as a bi-layer structured ferroelectric material was added into lead zirconate titanate (Pb(Zr0.52Ti0.48)O3; PZT). The ceramic with formula (1-x)PZT-xBNbT (x = 0.03, 0.05, 0,07, 0.15 and 0.20) were prepared by a solid state mixed oxide method. Phase analysis using XRD indicated that the pattern of the ceramic showed the single phase tetragonal of PZT, however, a BNbT peak appeared as BNbT content (x = 0.20) was increased. The microstructure of ceramic x = 0.03–0.15 had an equiaxed grain. With the addition of BNbT up to 0.20BNbT, the SEM micrographs also showed that plate-shaped grains started to dominate. The 0.97PZT–0.03BNbT ceramic showed the maximum dielectric constant (ϵr ∼ 679). With increasing amount of BNbT content, the dielectric constant and dielectric loss tangent gradually decreased. An addition, small amounts of BNbT content could improve normalized polarization (Pr ∼ 14.97 µC/cm2) of the ceramic.
Acknowledgments
NT would like to thank Pibulsongkram Rajabhat University (PSRU).
Funding
This work financially supported by the Pibulsongkram Rajabhat University, the Faculty of Science and Technology of Pibulsongkram Rajabhat University and the National Research Council of Thailand (NRCT).