BaTiO3-Bi(Zn3/4 W1/4)O3 Lead-free Relaxor Ferroelectric Ceramics with Improved Energy Storage Properties
(1-x)BaTiO3-xBi(Zn3/4 W1/4 )O3[(1-x)BT-xBZW]lead-free ceramics were prepared via sol-id-state reaction method.X-ray characterization indicated that the as-obtained ceramics show perovskite structure without the formation of a second phase,the tetragonal phase of BaTiO3 (BT)transformed into a pseudo-cubic phase via introduction of BZW.The grain size and surface density of the samples were ob-served by SEM,average grain size of the ceramics gradually increased from~2.36μm at x=0.05 to~5.93μm at x=0.20.It was observed from P-E hysteresis loops that modification with appropriate a-mount of BZW was an effective approach to modulate relaxation behavior of BT,and its energy-storage performance was promoted significantly.Improved energy-storage performance of Wrec~1.14 J cm-3 and η~92.60% can be achieved in the 0.85BT-0.15BZW ceramics,accompanied with excellent tempera-ture and frequency stabilities.(1-x)BT-xBZW ceramics are expected to be a potential candidate for energy-storage equipment with high stability.
energy storagelead-free ceramicsBaTiO3relaxor ferroelectrics