In this paper, 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-30%PT) single crystal samples were poled using an alternating current (electric field) poling (ACP) method. Compared to the traditional method, piezoelectric coefficient, free and clamped dielectric constants improved more than 21%. X-ray diffraction result suggests existence of monoclinic phase (MA) in ACP piezoresponse force microscopy (PFM) further depicts finer engineered domain structures. The sample also showed unique transition...

Abstract Since industry‐standard piezoelectric materials, such as lead zirconium titanate ceramics, contain toxic lead, a rapid surge in research on lead‐free materials is occurring due to concerns over environmental safety and human health. A ternary (Na 0.5 Bi )TiO 3 ‐BaTiO ‐(K Na )NbO single crystal with large field induced strain of ≈0.9% giant coefficient d 33 840 pC N −1 at room temperature reported. It revealed that the electric‐field‐induced phase transition boundary between...

For those piezoelectric materials that operate under high-power conditions, the and dielectric properties obtained small signal conditions cannot be directly applied to transducers. There are three mainstream characterization methods: constant voltage method, current transient method. In this study, we developed verified a combined impedance method integrated advantages of methods, along with an improved for testing PZT-5H ceramics. The results from both methods indicated increasing power,...

In this work, the piezoelectric and dielectric properties of [001]-oriented 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 single crystals under alternating current poling (ACP) at different temperatures were studied. The coefficients (d33 ∼ 1930 pC/N, d31 −850 pC/N) free permittivity (εT33/ε0 7570) reached their highest values when temperature (Tpoling) was 70 °C. Compared with traditional direct electric field 20 °C, °C-ACP samples showed an enhancement 40%, 35%, 49% for d33, d31, εT33/ε0, respectively....

The dielectric, ferroelectric, and electric field-induced strain response of [001]-and [101]-oriented 0.944Na0.5Bi0.5TiO3-0.056BaTiO3 (0.944NBT-0.056BT) single crystals were investigated as a function temperature dc bias (E). An ultrahigh electromechanical with large amplitude longitudinal piezoelectric coefficients high d33 = 2500 pm/V was found in [001]PC oriented 0.944NBT-0.056BT near depolarization Td 130 °C. In-situ XRD revealed that the enhanced properties resulted from polarization...

Alternating current (electric field) poling (ACP) was applied on [001]-oriented 0.7Pb(Mg1/3Nb2/3)O3-0.3PbTiO3 (PMN-0.3PT) single crystal samples with dimensions of 5 × 1.25 mm3 (with electrodes the mm2 surfaces), and influence ACP frequency (fACP) studied. Compared to those from traditional direct samples, piezoelectric coefficient (d33) free dielectric constant (εT33/ε0) could gain up a 67% increase 3200 pC/N 10 500, respectively. The fACP studied two main aspects: saturated properties...

Alternating current poling (ACP) was performed on Gen III relaxor-PT Mn-doped Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 (Mn: PIN-PMN-PT) single crystals with the direction of [001]. Experimental results proved that ACP could bring property enhancement to both k31 and k33 mode crystals. Compared those from traditional direct (DCP), optimized conditions (20 kV/cm, 0.1 Hz, 20 cycles) enhanced dielectric piezoelectric properties k31-mode by more than 30%, where free constant coefficient d33...

Diffuse scattering and relaxor behavior in Na0.5Bi0.5TiO3 (NBT) NBT-5.6 at. %BaTiO3 (NBT-5.6%BT) were investigated. X-ray diffraction revealed two types of diffuse NBT: (i) broad (ii) asymmetric L-shaped. After modification with 5.6%BT, the patterns became narrow, L-shaped ones replaced by symmetric ones. The NBT-5.6%BT disappeared increasing dc electric field (E) for E ≥ 9.5 kV/cm where frequency dispersion dielectric constant disappeared. These results demonstrate that characteristics are...

Temperature and electric field effects on rhombohedral $(R)$ ternary ${\mathrm{Pb}(\mathrm{In}}_{1/2}{\mathrm{Nb}}_{1/2}){\mathrm{O}}_{3}\text{\ensuremath{-}}{\mathrm{Pb}(\mathrm{Mg}}_{1/3}{\mathrm{Nb}}_{2/3}{)\mathrm{O}}_{3}\text{\ensuremath{-}}{\mathrm{PbTiO}}_{3}$ (PIN-PMN-PT) ferroelectric single crystals were comprehensively studied by x-ray diffraction. We have focused how the individual phase transitions as well transition sequences depend thermal electrical history. Electric...

Bandgap engineered ferroelectrics have raised the utmost interest in achieving visible/near-infrared light utilization. The gap states can not only realize absorption of but also keep their excellent piezoelectricity. However, impurity energy levels provide limited photogenerated carrier, and doping ions may act as trapping sites, which make it difficult to convert enough sunlight chemical or electrical energy. In this work, we report a novel strategy achieve cooperative interaction...

Pb(Mg1/3Nb2/3)O3-PbTiO3 single crystals (PMN-PT SCs) are widely utilized in high-performance piezoelectric devices due to their exceptional properties. Among the various post-processing techniques for domain engineering PMN-PT SCs, alternating current polarization (ACP) has become a adopted method enhancing performance. This study proposes new ultrahigh-temperature field-cooling (UFCP) technique, combining direct (DCP) and ACP with field cooling above Curie temperature. Dielectric spectra...

The crystallographic dependence of the DC electric (E) field induced strain and phase transition in Na0.5Bi0.5TiO3-5.6%BaTiO3 (NBT-5.6%BT) single crystals has been investigated. An between pseudocubic tetragonal structures was observed under E = 10 kV/cm for fields applied along 〈001〉 direction, whereas an rhombohedral when E-field 〈111〉. Our results show near morphotropic boundary that stability NBT-x%BT is dependent on direction which applied.

The structural, dielectric, and piezoelectric properties of Na0.5Bi0.5TiO3-x mol. %BaTiO3 (NBT-x%BT) crystals have been investigated. dielectric NBT-x%BT were enhanced near x = 5–7. High resolution synchrotron x-ray powder diffraction studies revealed the presence a phase boundary between monoclinic (Cc) tetragonal (P4bm) phases 5–7, where enhanced.

The overpoling effect of alternating current poling (ACP) was studied on [001]-orientated rhombohedral Pb(Mg1/3Nb2/3)O3-0.26PbTiO3 (PMN-0.26PT) single crystals. Our experimental results showed that the property enhancement from ACP remarkable only when cycle number (NL) kept low. When continued after saturation, dielectric and piezoelectric properties gradually dropped down to traditional direct poled levels or even lower. Such a decrease in material caused by large NL during defined as...

Neutron and x-ray scattering measurements were performed on $(\mathrm{N}{\mathrm{a}}_{1/2}\mathrm{B}{\mathrm{i}}_{1/2})\mathrm{Ti}{\mathrm{O}}_{3}\text{\ensuremath{-}}x\phantom{\rule{0.28em}{0ex}}\mathrm{at}%\mathrm{BaTi}{\mathrm{O}}_{3}$ (NBT-$x\mathrm{BT}$) single crystals ($x=4$, 5, 6.5, 7.5) across the morphotropic phase boundary (MPB), as a function of both composition temperature, probing structural dynamical aspects. In addition to known diffuse pattern near...

Magnetostrictive Fe-Ga thin layers were deposited on ⟨110⟩-oriented Pb(Mg1/3Nb2/3)-30%PbTiO3 (PMN-30%PT) substrates by pulsed laser deposition. The as-prepared heterostructures showed columnar arrays aligned in the out-of-plane direction. Transmission electron microscopy revealed nanocrystalline regions within of film. heterostructure exhibited a strong converse magnetoelectric coupling effect up to 4.55 × 10−7 s m−1, as well an electric field tunability in-plane magnetic anisotropy....

We propose a piezoelectric-piezoresistive coupling electric field sensor capable of performing large dynamic range AC measurements. The utilizes direct between piezoelectric (PE) materials and piezoresistive (PR) strain gauges, in conjunction with an external signal conditioning circuit, to measure fields effectively. verified the feasibility scheme using finite element simulation, fabricated prototype sensor, characterized properties prototype. testing results indicate that exhibits ac...