A5024935848- Acoustic Wave Resonator Technologies
- Ferroelectric and Piezoelectric Materials
- Photorefractive and Nonlinear Optics
- Dielectric materials and actuators
- Multiferroics and related materials
- Microwave Dielectric Ceramics Synthesis
- Innovative Energy Harvesting Technologies
- Advanced Sensor and Energy Harvesting Materials
- Photonic and Optical Devices
- Magnetic and transport properties of perovskites and related materials
- Advanced Fiber Laser Technologies
- Solid-state spectroscopy and crystallography
- Metallurgical and Alloy Processes
- Geophysics and Sensor Technology
- Optical and Acousto-Optic Technologies
Xi'an Jiaotong University
2016-2023
Institute of Physics
1997
Relaxor-lead titanate (PbTiO3) crystals, which exhibit extremely high piezoelectricity, are believed to possess electro-optic (EO) coefficients. However, the optical transparency of relaxor-PbTiO3 crystals is severely reduced as a result light scattering and reflection by domain walls, limiting applications. Through synergistic design ferroelectric phase, crystal orientation, poling technique, we successfully removed all light-scattering walls achieved an transmittance 99.6% in...
Abstract Relaxor‐PbTiO 3 crystals exhibit excellent piezoelectric properties ( d 33 > 2000 pC N −1 and k 90%) thus attractes widespread attention in the past two decades. However, inevitable segregation of components during crystal growth results relatively low‐performance consistency Pb(Mg 1/3 Nb 2/3 )O ‐PbTiO (PMN‐PT) crystals, which seriously affects their practical applications. In this work, Nd 3+ as A‐site substitution is introduced to improve uniformity electromechanical...
Compared with the state-of-the-art Pb(Zr,Ti)O3 ceramics, relaxor-PbTiO3 (PT) based ferroelectric single crystals possess much higher piezoelectricity, thus receiving considerable attention from community. Recently, it was found that alternating current electric field poling (AC-poling) could further improve piezoelectricity of [001]-poled rhombohedral (R) relaxor-PT crystals. In this work, we investigated domain structures and electromechanical properties poled (AC-poled) relaxor...
In this paper, temperature dependance of induced dielectric and piezoelectric properties in the [001]-oriented predirect current poling (DCP) 0.25Pb(In1/2Nb1/2)O3-0.43Pb(Mg1/3Nb2/3)O3-0.32PbTiO3 (0.25PIN-0.43PMN-0.32PT) single crystals near morphotropic phase boundary was investigated using alternating treatment (ACT). By optimized ACT conditions 1 kV/mm at 50 Hz over 20 cycles, permittivity (ɛ33T/ɛ0) coefficient (d33) room DCP-ACT crystal were improved to be 7120 2610 pC/N, which 48% 54%...
Compared with Pb(Zr,Ti)O <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> (PZT) ceramics, piezoelectric ceramic composites (PCCs), and polyvinylidene fluoride (PVDF) polymer, single crystal (PSCCs) are thought to be the promising candidates for hydrophone applications because of their superior hydrostatic performance. However, due brittleness small dimensions crystals, preparation large-area or conformal PSCCs is challenged. Herein, we...
In this work, the piezoelectric unimorph of a Pb(In1/2Nb1/2)O3 -Pb(Mg1/3Nb2/3)O3-PbTiO3 (PIN-PMN-PT) single crystal by alternating current poling (ACP) was studied for vibration energy harvesting. The figure merit d31×g31 0.25PIN-0.43PMN-0.32PT enhanced to be 29.3 × 10−12 m2/N ACP, which is 1.9 times and 8.9 as much that commercial PZT5H ceramic direct (DCP), respectively. ACP produced open circuit voltage 67 Vp maximum power 0.74 mW under on-resonance condition, were 1.5 1.8 DCP. Moreover,...
A Pb(In1/2Nb1/2)O3-Pb(Mg1/3Nb2/3)O3-PbTiO3 relaxor ferroelectric single crystal boule of 3 in. diameter was grown using [001]- and [011]-oriented co-growth crystals as seeds by the modified Bridgman method. The as-grown divided into two growth regions [001] [011]. composition electrical properties samples were characterized in detail along direction whole boule. PT content [001]-grown increased from 27.7 to 36.8 mol. % direction, especially they are averagely higher about 0.7 than those...
Traditional piezoelectric energy harvesters are made of ceramics with a cantilever structure, which show low output density. Thus, they difficult to meet the requirements for self-powered electronics. Herein, we report modified barbell-shaped harvester (BSPEH) based on two d33-mode cuboid Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 multilayer single crystal stacks (ten wafers thickness 0.5 mm and d33 ∼ 1300 pC/N). Due electrically parallel series connections elements high figure-of-merit × g33...
The piezoelectric and dielectric properties of PMN-PT single crystals were significantly enhanced by alternating current electric field poling (ACP). In this work, to investigate the mechanisms performance enhancement in relaxor ferroelectric ACP, a [001]-oriented PIN-PMN-PT crystal with diameter 3 was grown modified Bridgman method, series samples within 100 mm height boule prepared. Compared their direct (DCP) counterparts, electrical at different heights ACP regularly enhanced....
Pb([Formula: see text][Formula: text])O 3 -Pb([Formula: text]O -PbTiO (PIN-PMN-PT) relaxor ferroelectric crystals in 5 ″ diameter by length were grown the Bridgman (BR) method for first time. Typical issues crystal growth concerning large volume of melt, high density and corrosion melt on wall Pt crucible are discussed.
In this work, the transverse piezoelectric properties of pre-direct current poled (DCP) 0.25Pb(In1/2Nb1/2)O3-0.42Pb(Mg1/3Nb2/3)O3-0.33PbTiO3 (0.25PIN-0.42PMN-0.33PT) single crystals were enhanced by alternating treatment (ACT) 10 kVp/cm (5.8 kVrms/cm), 50 Hz, and 20 cycles. The constant d31 −1560 pC/N electromechanical coupling coefficient k31 0.92 at room temperature achieved in DCP-ACT crystal, which were, respectively, 80% 11% higher than those DCP crystal (d31=−870pC/N,k31=0.83) ....
Relaxor-PbTiO <sub xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</sub> (PT-based) ferroelectric single crystals are important for many piezoelectric applications because of their outstanding performances. In order to expand usage and avoid the failure during application, frequency dependence coercive fields E xmlns:xlink="http://www.w3.org/1999/xlink">C</sub> [001]- [011]-poled rhombohedral Pb(In...
A monoclinic phase is the bridge between rhombohedral and tetragonal phases in Pb(In1/2Nb1/2)O3–Pb(Mg1/3Nb2/3)O3–PbTiO3 (PIN–PMN–PT) single crystal near morphotropic boundary (MPB), which related to superior piezoelectric performance. In this paper, different transition process unpoled PIN–PMN–PT crystals MPB induced by composition variation was presented first. Based on this, direct current poling (DCP) alternating treatment (ACT) were applied these samples. Also, DCP–ACT have shown a more...
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Whispering gallery mode resonators (WGMRs) have garnered significant interest due to their potential applications in the fields of electro-optic modulation and microwave optical photon conversion. In this study, we leveraged an crystal, lead indium niobate-lead magnesium titanate (PIN-PMN-PT), fabricate a high-quality WGMR. Our investigation revealed that crystal composition used work is 0.24PIN-0.45PMN-0.31PT, each element whole sample homogeneously distributed. The dielectric properties...