Ferroelectric and piezoelectric properties of Gd3+ and Y3+ modified PKN electroceramics

摘要

Ceramics with the composition Pb1-xK2x-3yMyNb2O6 (PKMN) with x = 0.29, y = 0.145 and M = Gd-3+,Gd- Y3+ were synthesized by the solid-state reaction route between the corresponding oxides and carbonates. The crystal structure was confirmed by X-ray diffraction (XRD). The temperature dependence of dielectric properties were measured from 35 to 595 degrees C. Well-developed P-E (polarization-electric field) hysteresis loops were observed in the materials. Determining the piezoelectric constants, K-p = 20%, K-t = 49%, d(33) = 110, and quality factor, Q(m) = 33, reveals that the material Y3+-modified PKN can be useful for transducer applications.