Design and development of high-power piezoelectric ceramics through integration of crystallographic texturing and acceptor-doping. (March 2021) - Leng, Haoyang
Abstract: This study demonstrates the integrated approach based upon texturing and acceptor doping for realizing a high-power piezoelectric ceramic with combined soft and hard properties. The textured Mn-doped 0.24 Pb(In1/2 Nb1/2 )O3 -0.42 Pb(Mg1/3 Nb2/3 )O3 -0.34 PbTiO3 (PIN-PMN-PT) ceramic exhibits enhanced piezoelectric coefficient d 33 and electromechanical coupling factor k 31 in comparison with random counterpart. This enhanced piezoelectric response originates from the combined intrinsic high piezoelectric properties of <001>-oriented grains, and reduced energy barrier for polarization rotation in textured ceramics. The BaTiO3 (BT) template in textured ceramics increases the tetragonality degree which results in improved coercive field E c but decreased mechanical quality factor Q m in comparison with random counterpart. The decreased Q m values of textured ceramics are related to the crystallographic dependence of Q m and the enhanced domain mobility due to the existence of small size domains. The textured ceramic with 2 vol.% BT content exhibited an excellent combination of soft and hard piezoelectric properties, measured to be: d 33 = 517 pC/N, Q m = 1147, E c = 10.0 kV/cm, and tan δ = 0.49%, which is highly promising for high power piezoelectric applications. Graphical abstract: Image, graphical abstract