Abstract
Lead-free ceramics system of 0.96[Bi0.5Na0.5Ti(1−x)NbxO3]-0.04SrZrO3 BNT-SZ-Nb100x (with Nb100x = 0–4) were prepared by a solid-state reaction method. X-ray diffraction analysis revealed the formation of pure perovskite phase with x ≤ 0.03. The temperature dependence of dielectric curves showed that maximum dielectric constant temperature (Tm) shifted towards lower temperatures and the curves become more diffuse with increasing Nb doping. Ferroelectric curves indicated a disruption of ferroelectric order upon Nb addition. From Nb0 to Nb2 ceramics, maximum values for the field-induced strain (Smax) was enhanced from 0.09 to 0.22%. The corresponding normalized strain (Smax/Emax) was increased from 125 to 315 pm/V.
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