Realization of device quality PMN–PT ceramics using modulated heating method

Synthesis of 0.64Pb(Mg1/3Nb2/3)O3–0.36PbTiO3 ceramic near morphotropic phase boundary for high performance piezoelectric, ferroelectric and pyroelectric applications

“…The d 33 coefficient for 0.64PMN-0.36PT was found to be 490 pC/N. This value is higher than many previous reported values [14,15] and is comparable with the value reported by Huang et al [29]. Obtained high value of d 33 can be related to the microstructure of PMN-PT ceramic, which showed the formation of well-developed aligned grains with very small porosity, which lead to the large mobility of domain walls and thus large value of piezoelectric coefficient [30].…”

“…The porosity of the sample was found to be as low as 4.86%. Obtained high density of prepared PMN-PT ceramic at optimum sintering temperature of 1030 • C can be related to the formation of pure perovskite phase [15].…”

“…Therefore, in our present work, the 0.64PMN-0.36PT composition (which is close to MPB) has been chosen and prepared by solid-state reaction method using columbite precursor. Synthesis via columbite precursor route was adopted to minimize the possibility of pyrochlore phase formation [15]. A systematic study of dielectric, piezoelectric, ferroelectric and pyroelectric properties of 0.64PMN-0.36PT composition has been presented for the first time in this work.…”

“…Room temperature spontaneous polarization, remnant polarization and coercive electric field were found to be 19.74 C/cm 2 , 13.27 C/cm 2 and 7.55 kV/cm, respectively, which suggested its utility as switching devices. Change in polarization state of piezoelectric materials is associated with changes in the piezoelectric strain that is proportional to the square of the polarization [15]. Hence, the plot of square of polarization vs. electric field is equivalent to the hysteresis plot of strain vs. electric field (S-E).…”

Structural and Electrical Characteristics of (1−x)Pb(Lu1/2Nb1/2)O3–xPbTiO3 Ceramics with Low PbTiO3

“…Table shows the actual density, theoretical density, and relative density of the selected samples. The relative density was in the range 91.7%–97.2% which is reasonably the maximum expected in the ambient atmosphere, in accordance with dense structure which displayed in Fig. .…”