A5036484025- Ferroelectric and Piezoelectric Materials
- Multiferroics and related materials
- Acoustic Wave Resonator Technologies
- Solidification and crystal growth phenomena
- Shape Memory Alloy Transformations
- Dielectric materials and actuators
- Aluminum Alloy Microstructure Properties
- Pickering emulsions and particle stabilization
- Microstructure and mechanical properties
- Magnetic and transport properties of perovskites and related materials
- Cellular and Composite Structures
- Microwave Dielectric Ceramics Synthesis
- Magnetic Properties and Applications
- Numerical methods in engineering
- Ultrasound Imaging and Elastography
- Semiconductor materials and devices
- Composite Material Mechanics
- Microstructure and Mechanical Properties of Steels
- Integrated Circuits and Semiconductor Failure Analysis
- X-ray Diffraction in Crystallography
- Ultrasound and Hyperthermia Applications
- Enzyme Structure and Function
- High-pressure geophysics and materials
- Elasticity and Material Modeling
- Advanced Mathematical Modeling in Engineering
University of Science and Technology of China
2022-2025
Hefei National Center for Physical Sciences at Nanoscale
2025
Guangxi University
2024-2025
Michigan Technological University
2013-2023
Hebei University of Science and Technology
2023
Heilongjiang University of Technology
2023
North University of China
2022
Beijing Forestry University
2020
UNSW Sydney
2020
Tongji University
2019
Abstract A rapid surge in the research on piezoelectric sensors is occurring with arrival of Internet Things. Single-phase oxide materials giant voltage coefficient ( g , induced under applied stress) and high Curie temperature T c ) are crucial towards providing desired performance for sensing, especially harsh environmental conditions. Here, we report a grain-oriented (with 95% <001> texture) modified PbTiO 3 ceramic that has (364 °C) an extremely large 33 (115 × 10 −3 Vm N −1...
Electromechanical coupling factor, k, of piezoelectric materials determines the conversion efficiency mechanical to electrical energy or energy. Here, we provide an fundamental approach design that near-ideal magnitude via exploiting electrocrystalline anisotropy through fabrication grain-oriented textured ceramics. Coupled phase field simulation and experimental investigation on <001> Pb(Mg1/3Nb2/3)O3-Pb(Zr,Ti)O3 ceramics illustrate k can reach same as for a single crystal, far beyond...
A theory is developed for intermediate monoclinic (FE(m)) phases near morphotropic phase boundaries in ferroelectrics of complex oxides. It based on the conformal miniaturization stress-accommodating tetragonal domains under condition low domain-wall energy density. The microdomain-averaged lattice parameters are determined and attributed to an adaptive phase. applied temperature, electric field, compositional dependent FE(m) parameters. predictions rigidly obeyed over entire stability range.
Ferroelectric and ferroelastic phases with very low domain wall energies have been shown to form miniaturized microdomain structures. A theory of an adaptive ferroelectric phase has developed predict the microdomain-averaged crystal lattice parameters this structurally inhomogeneous state. The is extension conventional martensite theory, applied systems energies. case microdomains tetragonal symmetry considered. It for such a that nanoscale coherent mixture can be interpreted as phase, whose...
Abstract Piezoelectric materials enable the conversion of mechanical energy into electrical and vice‐versa. Ultrahigh piezoelectricity has been only observed in single crystals. Realization piezoelectric ceramics with longitudinal constant ( d 33 ) close to 2000 pC N –1 , which combines crystal‐like high properties ceramic‐like cost effectiveness, large‐scale manufacturing, machinability will be a milestone advancement ceramic materials. Here, guided by phenomenological models phase‐field...
The phase field microelasticity theory of a three-dimensional elastically anisotropic solid arbitrarily inhomogeneous modulus also containing arbitrary structural inhomogeneities is proposed. based on the equation for strain energy and structurally system presented as functional field, which effective stress-free “equivalent” homogeneous system. It proved that minimizing this fully determines exact elastic equilibrium in solid. minimizer obtained steady state solution time-dependent...
The Brillouin zone-dependent conditions for coherent and adaptive diffractions are formulated. Adaptive diffraction phenomenon of nanotwins is analyzed. Extraordinary Bragg reflection peaks appear adaptively shift along the conventional twin peak splitting vectors, whose positions determined by lever rule according to variant volume fractions. Analysis rhombohedral shows that nanotwin superlattices phase with {001} {110} planes diffract incident waves just like monoclinic ${M}_{A}$ ${M}_{B}$...
[001]-textured Pb(Mg1/3Nb2/3)O3-PbTiO3 (PMN-PT) ceramics were synthesized by using templated grain growth method. Significantly high [001] texture degree corresponding to 0.98 Lotgering factor was achieved at 1 vol. % BaTiO3 template. Electromechanical properties for PMN-PT with found be d33 = 1000 pC/N, d31 371 ɛr 2591, and tanδ ∼0.6%. Elastoelectric composite based modeling results showed that higher volume fraction of template reduces the overall dielectric constant thus has adverse...
The phase field theory and model of a multidislocation dynamics in an elastically anisotropic crystal under applied stress is developed. proposed three-dimensional (3D) particular case our microelasticity the stress-induced martensitic transformations. A spontaneous self-organization dislocations evolving ensemble, which involves multiplication/annihilation movement controlled by their elastic interaction, described Ginzburg–Landau kinetic equation. Examples 3D computer simulation...
Computer modeling and simulation reveal a domain wall broadening mechanism that explains the size effect of enhanced piezoelectric properties in engineered ferroelectric single crystals. The shows that, under electric field applied along nonpolar axis crystal without motion, broadens serves as embryo field-induced new phase, producing large reversible strain free from hysteresis. This plays significant role vicinity interferroelectric transition temperature morphotropic phase boundary, where...
Phase field modeling and computer simulation is employed to study the relations between filler microstructures effective properties of dielectric composites. The model solves electrostatic equations in terms polarization vector reciprocal space using a fast Fourier transform technique parallel computing algorithm. Composites composed linear constituent phases different constants are considered. Interphase boundary conditions automatically taken into account without explicitly tracking...
The relationship between the applied elastic strain gradient and induced electric polarization in α-phase polyvinylidene fluoride films under bending conditions has been investigated. Our experimental studies have shown that flexoelectric is linearly proportional to corresponding direct response strong. It reasonable believe physical mechanisms behind effects polymers solid dielectrics are different.
This work develops the Leather/SSG composite with a laminated structure that consists of flexible leather and rate-dependent shear stiffening gel (SSG), which exhibits superior impact resistance shock wave protection performance. The SSG is tightly bound to fiber network through hydrogen bonding interactions between interfaces. Owing phase change energy absorption effect synergizing force dispersion along disordered fibers, can effectively alleviate (52%) shows high (0.86-0.95). Besides,...
Systematic analysis of extensive experimental data confirms the theoretical prediction three intrinsic relationships lattice parameters between recently discovered intermediate monoclinic ${\mathrm{M}}_{\mathrm{C}}$ phase and conventional tetragonal in ferroelectric $\mathrm{Pb}[{({\mathrm{Mg}}_{1∕3}{\mathrm{Nb}}_{2∕3})}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}]{\mathrm{O}}_{3}$ $\mathrm{Pb}[{({\mathrm{Zn}}_{1∕3}{\mathrm{Nb}}_{2∕3})}_{1\ensuremath{-}x}{\mathrm{Ti}}_{x}]{\mathrm{O}}_{3}$ near...