Low-temperature sintered PMnN-PZT based ceramics using the B-site oxide precursor method for therapeutic transducers

An ultrasonic therapeutic transducers using lead-free Na0.5K0.5NbO3–CuNb2O6 ceramics

“…However, the values of these ceramics are not as high as those of PMZT3 ceramics [22,23]. The value of the mechanical quality factor (Q m ) was determined using [26]:…”

Electrical properties and temperature behavior of ZnO-doped PZT–PMnN modified piezoelectric ceramics and their applications on therapeutic transducers

“…Following to our previous work, 1 mol% Ca and Sr dopants were added to improve the loss effects of the piezoelectric ceramics [22]. The compositions chosen in the present study were Pb0.98Ca0.01Sr0.01[(Mn 1/3 Nb 2/3 ) 0.054 Cu0.006-(Zr0.52Ti0.48)0.94]O3…”

“…2(f)) due to the large grain impinge on each other, leading to the decrease of dielectric constant and the increase of dielectric loss. As a consequence, the dielectric constant and dielectric loss decrease due to the grain size decrease, while pores formation result in the dielectric loss increase [22,33]. In addition, it is indicated that the dielectric constant is correlated with the phase structure and the domain alignment.…”

“…In our previous work, the low-temperature sintered CuO-doped Pb 0.98 Ca 0.01 Sr 0.01 [(Mn 1/3 Nb 2/3 ) 0.06 (Zr 0.52 Ti 0.48 ) 0.94 ]O 3 piezoelectric ceramics substrates for the SAW devices have been successfully developed and exhibited excellent characterization in the effective coupling factor of devices [22]. Recently, the mechanism of ZnO and CuO co-doping into the crystal structure of abovementioned piezoceramics has been proposed by the enlarged XRD pattern shift and conductive analysis as reported in our paper [23].…”

Study on Pb(Mg1/3Ta2/3)O3–Pb(Mn1/3Sb2/3)O3–Pb(ZrxTi1−x)O3 high power piezoelectric ceramics near the morphotropic phase boundary

“…Moreover, high piezoelectric coefficient (d 33 ) and electromechanical coupling factor (k p ) are also required for high torque output and efficiency. For piezoelectric properties enhancement, Pb(Zr,Ti)O 3 (PZT) based ternary or quaternary systems, such as PZN-PZT [5], PMN-PZT [6], PMN-PZN-PZT [7], PMN-PFW-PZT [8], have been intensively investigated. It is reported that in these systems, ceramics with compositions near the morphotropic phase boundary (MPB) always possess optimum properties.…”