High radiation tolerance of electrocaloric (1-x)Pb(Mg1/3Nb2/3)O3–xPbTiO3

Multifunctional flexible ferroelectric thick-film structures with energy storage, piezoelectric and electrocaloric performance

“…The determined maximum Δ T EC value is comparable to the maximum value measured in PMN–35PT bulk ceramic samples, which is reported as 0.9 K at 107 °C and 60 kV cm −1 41 and 0.55 K at 115 °C and 30 kV cm −1 . 42 However, when comparing the Δ T EC values of PMN–35PT bulk ceramics and aerosol deposited thick films at similar temperature, i.e. ∼65 °C, the Δ T EC value of thick films exceeds the value reported for bulk ceramics ( i.e.…”

Phase evolution and strong temperature‐dependent electrostrictive effect in (1−x)Pb(Mg1/3Nb2/3)O3‐xPbTiO3 solid solutions

“…In general, the hysteresis in these S – E curves with x = 0.15–0.25 are smaller than that of x = 0.1. Due to the switching of macrodomains, the hysteresis of S – E curves increases with increasing E ‐field in the x = 0.3 composition and is greater than that of the x = 0.1 composition 11 . Here, the electrostrain is evaluated in term of equivalent piezoelectric coefficient ($$d_{33}^*$$), defined as S / E 46 .…”

“…Numerous investigations on PMN-xPT solid solutions concentrate on values for x that range from 0.28 to 0.35, which are near to the so-called "morphotropic phase boundary" (MPB). 1,[7][8][9][10][11][12] Because of the lowering of the free energy barrier at the MPB, tetragonal and rhombohedral phases coexist there, which results in extremely strong piezoelectricity. 5 It was discovered that PMN-0.33PT single crystals have extraordinary piezoelectric properties, such as a longitudinal piezoelectric constant that is greater than 2500 pC/N and an electromechanical coupling coefficient that is greater than 90%.…”

“…This system is made up of a relaxor ferroelectric (RFE) PMN and a normal ferroelectric PT. Numerous investigations on PMN‐ x PT solid solutions concentrate on values for x that range from 0.28 to 0.35, which are near to the so‐called “morphotropic phase boundary” (MPB) 1,7–12 . Because of the lowering of the free energy barrier at the MPB, tetragonal and rhombohedral phases coexist there, which results in extremely strong piezoelectricity 5 .…”

“…Due to the switching of macrodomains, the hysteresis of S-E curves increases with increasing Efield in the x = 0.3 composition and is greater than that of the x = 0.1 composition. 11 Here, the electrostrain is evaluated in term of equivalent piezoelectric coefficient (𝑑 * 33 ), defined as S/E. 46 Based on the S-E curves determined under an E max of 30 kV/cm, we plot the 𝑑 * 33 as a function of E-field for all the examined compositions in Figure 5.…”