Dielectric and piezoelectric properties of Ba(Zr xTi1-x)O3 lead-free ceramics

lead-free ceramics ba(zrxti1-x)o3 (x = 0.02-0.2) were prepared using a solid-state reaction technique. the structural and electrical properties were systemically investigated. crystalline structures and microstructures were analyzed by x-ray diffraction and scanning electron microscope (sem) at room temperature. all the samples possess pure perovskite structure. a small amount of zr content has great effect on the microstructure of ba(zrxti1-x)o3 ceramics. the homogeneous microstructure with grain size about 30μm is obtained for the sample at x = 0.05. the phase transitions merge together in one peak for the samples at x = 0.10 and the highest dielectric constant 15900 is obtained for the sample at x = 0.15. the ba(zrxti1-x)o3 ceramics at x=0.05 exhibit excellent piezoelectric properties of high d33 = 208 pc/n, kp = 31.5% and qm = 500.