Article
Materials Science, Ceramics
Hongrui Jia, Jiahao Mi, Zhen Li, Linghang Wang
Summary: In this study, Sm-doped Pb(Mg1/3Nb2/3)O-3-Pb(Zn1/3Nb2/3)-PbTiO3 ternary ferroelectric ceramics near MPB were successfully manufactured and investigated. The results showed that Sm doping can achieve a high piezoelectric coefficient and a high Curie temperature simultaneously, and the room temperature dielectric constant was greatly improved. These Sm-doped ceramics may have potential applications in high-performance piezoelectric devices.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
R. Zheng, M. Y. Yan, C. Li, S. Q. Yin, W. D. Chen, G. Y. Gao, J. M. Yan, Y. Chai
Summary: The electronic properties of optothermal ferroelectric field-effect transistors (FeFETs) can be modulated by growing Bi2Te3 films on (111)-oriented PMN-PT ferroelectric single-crystal substrates. Through switching the polarization direction of PMN-PT and infrared light illumination, the carrier density and resistance of Bi2Te3 films can be modulated in real-time.
Article
Chemistry, Physical
Hongrui Jia, Shuai Yang, Weitong Zhu, Fei Li, Linghang Wang
Summary: The crystal structure, microstructure, and properties of Sm: PMN-PT textured ceramics were investigated, revealing that Sm doping can improve piezoelectric and dielectric properties. Ceramics with 1.9 mol% Sm exhibit high piezoelectric coefficient and polarization behavior. The dielectric constants increase with Sm content, unaffected by PT content.
JOURNAL OF ALLOYS AND COMPOUNDS
(2021)
Article
Materials Science, Multidisciplinary
Zhaojiang Chen, Haoran Shi, Lian Cui, Wenwu Cao
Summary: Severe and rapid ferroelectric fatigue phenomena were observed under cyclic loading of a strong bipolar electric field, with remnant polarization P-r and saturation polarization P-s showing anomalous increases with temperature T, possibly due to depinning of domains. Additionally, different linear scaling relations between Log < A > and Log(f) at different frequency ranges could contribute to heterogeneous nucleation or thermally activated creep motion of domains.
JOURNAL OF MATERIALS SCIENCE
(2021)
Article
Materials Science, Multidisciplinary
Zhen Wang, Zheyi An, Jian Zhuang, Fei Li, Wei Ren, Zuo-Guang Ye, Nan Zhang
Summary: In this study, neutron atomic pair distribution function (PDF) analysis was used to investigate the local-structural features of relaxor-ferroelectric materials at low temperatures. The results revealed that the existence of polar nanoregions (PNRs) is characterized by strong displacement correlation rather than structural symmetry. This finding provides a better understanding of the high-performance piezoelectric properties of these materials.
JOURNAL OF MATERIALS CHEMISTRY C
(2022)
Article
Materials Science, Ceramics
Ruoyu Wang, Yixiao Jiang, Neng He, Xiang Li, Tingting Yao, Limei Zheng, Chunlin Chen, Lianlong He, Hengqiang Ye
Summary: This study systematically investigates the ferroelectric domain structure and atomic-scale phase distribution in lead-based relaxor ferroelectric crystals, revealing the differences in ferroelectric properties of different phases at the nanoscale.
CERAMICS INTERNATIONAL
(2022)
Article
Chemistry, Multidisciplinary
Jie Lei, Xiaojuan Li, Xing Fan, Zhaozhong Yan, Aiguo He, Wei Long, Pinyang Fang, Feifei Guo, Zengzhe Xi
Summary: By doping with V2O5, V-PSN-PMN-PT relaxor ferroelectric crystals with high piezoelectric coefficient, high Curie temperature, and large strain were successfully grown, indicating their potential applications in large power transducers and high temperature field due to the coexistence of monoclinic and tetragonal phases and lattice distortion.
Article
Chemistry, Physical
Yan Zhu, Guicheng Jiang, Yihong Li, Yingchun Liu, Hongjun Zhang, Shengpeng Han, Bin Yang, Jian Liu, Wenwu Cao
Summary: Rare earth doped lead-based ferroelectrics have great potential in sensing, detection and information transmission. Research shows that ceramics doped with rare earth Eu ions exhibit good electrical and optical properties near x = 0.27, providing a new direction for improving the performance and expanding the application range of rare earth doped ferroelectrics.
JOURNAL OF ALLOYS AND COMPOUNDS
(2022)
Article
Materials Science, Multidisciplinary
Xudong Qi, Kai Li, Enwei Sun, Bingqian Song, Da Huo, Jiaming Li, Xianjie Wang, Rui Zhang, Bin Yang, Wenwu Cao
Summary: This study investigates the anomalous photovoltaic effect of relaxor-based ferroelectric PIMN-PT ceramics, achieving excellent photovoltaic performance with an ultrahigh open-circuit voltage. The results suggest that PIMN-PT ceramics are a potential candidate for photovoltaic solar energy conversion devices.
JOURNAL OF MATERIALS SCIENCE & TECHNOLOGY
(2022)
Article
Optics
XingRong Zhu, Chongjun He, YiYang Wen, Chenguang Deng, Qian Li, Ziyun Chen, Hongbing Chen, Yuangang Lu, Youwen Liu
Summary: A single crystal of Nd-doped lead magnesium niobate titanate (0.74PMN-0.26 PT) was successfully grown using a modified Bridgman approach. The crystal exhibited perovskite structure and showed improved optical properties and dielectric constants. The findings suggest potential applications in various fields.
JOURNAL OF LUMINESCENCE
(2022)
Article
Crystallography
Fan Liao, Yan Zhao, Ziyun Chen, Yanqing Zheng, Hongbing Chen
Summary: A relaxor-based ferroelectric single crystal with different nominal compositions was grown by the vertical Bridgman process. The single crystals showed improved piezoelectric properties and changes in domain structure when polarized with alternating current voltage, as well as exhibited characteristic emission peaks in the luminescent spectra related to Sm3+ ions transition.
Article
Materials Science, Multidisciplinary
Haotian Wan, Chengtao Luo, Chang Liu, Wei-Yi Chang, Yohachi Yamashita, Xiaoning Jiang
Summary: Poling silver-mode single crystals in an alternating current electric field significantly enhances their dielectric constant and piezoelectric coefficient, while also leading to domain morphology evolution.
Article
Physics, Applied
Yudong Hu, Xiaoming Yang, Wenjie Zhang, Zujian Wang, Haiyue Tang, Rongbing Su, Ying Liu, Xifa Long, Chao He
Summary: In this study, the performance fluctuation of direct current poling (DCP) and alternating current poling (ACP) Pb(In1/2Nb1/2)O-3-Pb(Mg1/3Nb2/3)O-3-PbTiO3 (PIN-PMN-PT) ferroelectric single crystals grown in the [110] direction using the vertical Bridgman method was compared. The ACP samples showed higher d(33) and e(33)(T)/e(0) values, 18% and 23%, 21% and 26% higher than DCP samples, respectively. This study suggests that ACP has great potential in improving the performance of PMN-PT based ferroelectric crystals.
JOURNAL OF APPLIED PHYSICS
(2023)
Article
Chemistry, Physical
Hui Liu, Zheng Sun, Shengdong Sun, Yueyun Zhang, Huajie Luo, He Qi, Laijun Liu, Joerg C. Neuefeind, Xianran Xing, Jun Chen
Summary: This study investigates the local structure of lead-based relaxor ferroelectrics using neutron total scattering combined with reverse Monte Carlo modeling. The results reveal the existence of ordered/disordered features and forced behavior of polar vectors in the material. The study provides insights into the polarization behavior of relaxor ferroelectrics, laying a foundation for understanding their unique properties.
CHEMISTRY OF MATERIALS
(2022)
Article
Materials Science, Ceramics
Pengbin Wang, Qinghu Guo, Fei Li, Fangquan Xia, Hua Hao, Huajun Sun, Hanxing Liu, Shujun Zhang
Summary: A series of Sm3+-doped ferroelectric ceramics were fabricated, with the optimum piezoelectric performance achieved at the morphotropic phase boundary composition. The synergistic contribution of MPB and local structural heterogeneity led to high piezoelectricity and temperature stability.
JOURNAL OF THE AMERICAN CERAMIC SOCIETY
(2021)
Article
Materials Science, Multidisciplinary
Pei Zhang, Hai Qing
Summary: In this paper, size-dependent buckling analysis for slightly curved sandwich microbeams made of functionally graded materials was conducted using a stress-driven nonlocal model. The Fredholm integral constitutive equations were transformed into the Volterra type of the first kind and solved analytically using Laplace transformation and its inversion under different boundary conditions. The exact solutions were validated against existing results. The study investigated the effects of the nonlocal parameter, thickness ratio of core-to-skin layers, FG power-law index, and length-height ratio on the buckling loads and the ratio of predicted results by two common beam theories.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2022)
Article
Acoustics
Pei Zhang, Hai Qing
Summary: In this work, two-phase local/nonlocal integral models are used to study the size effect in the free vibration of Euler-Bernoulli curved beams. The results show consistent softening and stiffening effects on vibration response for both types of nonlocal strategies under different boundary conditions.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Acoustics
Pei Zhang, Hai Qing
Summary: This article investigates the well-posedness of several common nonlocal models for higher-order refined shear deformation beams. By studying the free vibration problem of nanobeams, it is shown that the strain-driven and stress-driven two-phase nonlocal models exhibit well-posed behavior. The numerical results demonstrate that both models can predict consistent size-effects of beams with different boundary conditions.
JOURNAL OF VIBRATION AND CONTROL
(2022)
Article
Mechanics
Hai Qing, Yuxiao Cai
Summary: This study investigates the nonlinear post-buckling behavior of a nanobeam under different boundary conditions using strain- and stress-driven two-phase local/nonlocal integral models. The study takes into account Von Karman nonlinearity and derives the nonlinear governing equations through the principle of minimum potential energy. Numerical solutions are obtained for linear and nonlinear buckling forces and buckling mode shapes.
ARCHIVE OF APPLIED MECHANICS
(2023)
Article
Computer Science, Interdisciplinary Applications
Pei-Liang Bian, Hai Qing
Summary: In this study, a new FEM framework was developed to simulate the mechanical responses of the Euler-Bernoulli beam with a two-phase local/nonlocal mixed model. The model showed efficient convergence, simplicity of expressions, and flexibility in handling various boundary conditions and external loads.
ENGINEERING WITH COMPUTERS
(2023)
Article
Acoustics
Pei Zhang, Peter Schiavone, Hai Qing
Summary: This paper presents predictive models for the free vibration of Euler-Bernoulli beams subjected to a uniformly thermal environment using the two-phase local/nonlocal mixture theory. The effects of temperature, size, and vibration mode on the beams are considered.
JOURNAL OF SOUND AND VIBRATION
(2022)
Article
Thermodynamics
Pei Zhang, Peter Schiavone, Hai Qing
Summary: In this article, predictive models for the buckling loads of Bernoulli-Euler nanobeams under uniform thermal environment are introduced based on strain-/stress-driven local/nonlocal mixture theories. The constitutive equation is expressed in the form of local/nonlocal mixture integrals with the bi-Helmholtz kernel. The temperature effect is considered as a thermal load induced by thermal expansion and boundary constraint, and the local/nonlocal mixture effects on the thermal load are taken into account. The integral governing equations derived using different local/nonlocal mixture models are solved using Laplace transform methods, and exact solutions for critical buckling loads are obtained. A series of numerical examples are provided to show the predictions of size-effects on beams with various boundary edges, as well as the influence of considering the size-dependent thermal loads.
JOURNAL OF THERMAL STRESSES
(2022)
Article
Materials Science, Multidisciplinary
Pei-Liang Bian, Hai Qing
Summary: A new phase-field based method is proposed to represent graphene reinforced composites and investigate their mechanical properties. The model is validated through comparison with a shell based finite element model, and it provides a simple way to model thin flakes reinforced composites in FEM software.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
Article
Engineering, Multidisciplinary
Pei Zhang, Peter Schiavone, Hai Qing
Summary: In this paper, the authors developed bi-Helmholtz averaging kernel-based nonlocal strain and stress gradient integral models to study the size dependent bending of functionally graded beams. They derived nonstandard constitutive boundary conditions and used Laplace transform technique for closed-form solutions. Numerical simulations showed that the proposed models were capable of describing the sizeeffects on bending deformation of beams with different boundary types by adjusting the relevant parameters.
APPLIED MATHEMATICAL MODELLING
(2022)
Article
Mechanics
Lu Wei, Hai Qing
Summary: The modified couple stress theory is applied to analyze the static bending, elastic buckling, and free vibration behaviors of circular/annular micmplates made of bi-directionally functionally graded materials. The numerical results show the effects of material length scale parameter, FG material indices, and inner-to-outer radius ratio on the bending deflection, buckling loads, and free vibration frequency.
COMPOSITE STRUCTURES
(2022)
Article
Mechanics
Yan-Ming Ren, Peter Schiavone, Hai Qing
Summary: In this paper, a nonlocal gradient piezoelectric model capable of distinguishing softening and toughening size-effects due to elasticity and piezoelectricity is proposed. The model is applied to study the static bending of functionally graded piezoelectric nanobeams. The results show that bending deflections increase consistently with the increase of nonlocal parameter and the decrease of gradient parameter for strain-driven model and the decrease of nonlocal parameter and the increase of gradient parameter for stress-driven model.
EUROPEAN JOURNAL OF MECHANICS A-SOLIDS
(2022)
Article
Acoustics
HuiDiao Song, Hai Qing
Summary: In this study, two-phase local/nonlocal integral viscoelastic models (TPNIVM) are proposed to analyze the free thermo-damping vibration of functionally graded porous microbeams. The results show that environmental temperature variation, nonlocal parameters, and porous distribution parameters all have significant effects on the elastic vibration frequency and damping ratio.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Mathematics, Applied
Yuan Tang, Hai Qing
Summary: In this study, strain-driven and stress-driven two-phase local/nonlocal integral models were used to investigate the size-dependent nonlinear post-buckling behaviors of functionally graded porous Timoshenko microbeams. The results showed that the nonlocal LBMS-based Ritz-Galerkin method and GDQM-based Newton-Raphson's method accurately predicted the linear and nonlinear post-buckling loads, while the local LBMS-based Ritz-Galerkin method failed to provide accurate predictions.
COMMUNICATIONS IN NONLINEAR SCIENCE AND NUMERICAL SIMULATION
(2023)
Article
Acoustics
Hai Qing
Summary: This paper proposes two-phase local/nonlocal integral models (TPNIM) to study the viscoelastic nonlinear forced vibration behaviors of microbeams in a thermal environment. The effects of various factors on the nonlinear vibration behavior of the microbeams are investigated numerically.
JOURNAL OF VIBRATION AND CONTROL
(2023)
Article
Materials Science, Multidisciplinary
Pei Zhang, Hai Qing
Summary: In this study, fracture of nanobeams with central cracks was investigated using the nonlocal stress gradient integral model (NSGIM) with added integral terms and constitutive continuity conditions. Numerical simulations were performed to analyze the effects of nonlocal and gradient length scale parameters on normalized energy release rates and external load works.
MECHANICS OF ADVANCED MATERIALS AND STRUCTURES
(2023)
