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Ultra-slim electrostrains with superior temperature-stability in leadfree sodium niobate-based ferroelectric perovskite

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Journal of Materiomics 2022年第6期8卷 1230-1238页

作者： Ruiyi Jing Qingyuan Hu Leiyang Zhang Yuan Sun Jiagang Wu D.O.Alikin V.Ya Shur Xiaoyong Wei Hongliang Du Yunfei Chang Li Jin Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric ResearchSchool of Electronic Science and EngineeringXi'an Jiaotong UniversityXi'an710049China Functional Materials and Acousto-Optic Instruments Institute School of Instrumentation Science and EngineeringHarbin Institute of TechnologyHarbin150080China Department of Materials Science Sichuan UniversityChengdu610065China School of Natural Sciences and Mathematics Ural Federal UniversityEkaterinburg620000Russia Multifunctional Electronic Ceramics Laboratory College of EngineeringXi'an International UniversityXi'an710077China

Large electrostrains with high temperature stability and low hysteresis are essential for applications in high-precision actuator devices.However,achieving simultaneously all three of the aforementioned features in ferroelectric ceramics remains a considerable challenge.In this work,we firstly report a high unipolar electrostrain(0.12%at 60 kV/cm)in(1ex)NaNbO_(3)-x[(Ba0.85Ca0.15)(Zr_(0.1)Ti_(0.9))O_(3)](NN-xBCZT)ferroelectric polycrystalline ceramics with excellent thermal stability(variation less than 10%in the temperature range of 30-160℃)and ultra-low hysteresis(<6%).Secondly,the high-field electrostrain response is dominated by the intrinsic electrostrictive effect,which may account for more than 80%of the electrostrain.Furthermore,due to the thermal stability of the polarization in the pure tetragonal phase,the large electrostrain demonstrates extraordinarily high stability from room temperature to 140℃.Finally,in-situ piezoelectric force microscopy reveals ultra-highly stable domain structures,which also guarantee the thermal stability of the electrostrain in(NN-xBCZT ferroelectrics ceramics.This study not only clarifies the origin of thermally stable electrostrain in NN-xBCZT ferroelectric perovskite in terms of electrostrictive effect,but also provides ideas for developing applicable ferroelectric ceramic materials used in actuator devices with excellent thermal stability.

关键词： Electrostrain electrostriction NaNbO_(3) Polarization

The Study of Optoacoustic First and Second Sound Waves in Superfluid Helium under the Effect of Gaussian Laser Light Considering electrostriction Mechanism

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Journal of Modern Physics 2015年第7期6卷 855-862页

作者： Leyla Safaei Kouchaksaraei Physics Science and Research Institute Tajik National University Dushanbe Tajikistan

The present paper is aimed to study the effect of Gaussian laser light on first and second sound waves in superfluid helium theoretically using optoacoustic method. The mechanism applied in this study is electrostriction mechanism. This study considers crystal parts of superfluid helium with a zero absorption coefficient applying electrostriction mechanism. Affecting Gaussian laser light on these crystal parts, a spectrum of cylindrical first and second sound waves and cylindrical slow and rapid waves is obtained. Meanwhile, frequency of waves amplitudes proportionate to time period of laser light is calculated.

关键词： electrostriction Mechanism First and Second Sound Waves Gaussian Laser Light Superfluid Helium

Coupling effects between elastic and electromagnetic fields from the perspective of conservation of energy

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Applied Mathematics and Mechanics(English Edition) 2021年第11期42卷 1649-1662页

作者： Peng ZHOU Department of Mechanics Harbin Institute of TechnologyHarbin 150001China

Coupling effects among different physical fields reflect the conversion of energies from one field into another substantially.For simple physical processes,their governing or constitutive equations all satisfy the law of conservation of energy(LCE).Then,an analysis is extended to the coupling effects.First,for the linear direct and converse piezoelectric and piezomagnetic effects,their constitutive equations guarantee that the total energy is conserved during the process of energy conversion between the elastic and electromagnetic fields.However,the energies are converted via the work terms,(βijkEi),kvj and(γijkHi),kvj,rather than via the energy terms,βijkEiejk andγijkHiejk.Second,for the generalized Villari effects,the electromagnetic energy can be treated as an extra contribution to the generalized elastic energy.Third,for electrostriction and magnetostriction,both effects are induced by the Maxwell stress.Moreover,their energies are purely electromagnetic and thus both have no converse effects.During these processes,the energies can be converted in three different ways,i.e.,via the non-potential forces,via the cross-dependence of the energy terms,and directly via the electromagnetic interactions of ions and electrons.In the end,the general coupling processes which involve elastic,electromagnetic fields and diffusion are also analyzed.The advantages of using this energy formulation are that it facilitates discussion of the conversion of energies and provides better physical insights into the mechanisms of these coupling effects.

关键词： piezoelectricity piezomagnetism Villari effect electrostriction magnetostriction

Modeling large reversible electric-field-induced strain in ferroelectric materials using 90° orientation switching

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Science China(Technological Sciences) 2009年第1期52卷 141-147页

作者： Roderick V. N. MELNIK Mathematical Modelling and Computational Sciences Wilfrid Laurier University Waterloo 75 University Ave W Canada N2L 3C5

Reversible large electric-field-induced strain caused by reversible orientation switchings in BaTiO3 is modeled using the Landau's theory of phase transition. A triple well free energy function is constructed. Each of its minima is associated with one of the polarization orientations involved. Nonlinear constitu- tive laws accounting for reversible orientation switchings and electrostriction effects are obtained by using thermodynamic equilibrium conditions. Hysteretic dynamics of one-dimensional structures is described by coupled nonlinear differential equations. Double hysteretic loops in the electric and me- chanic fields are both successfully modeled. Giant reversible electrostriction is modeled as a conse-quence of reversible orientation switchings via electro-mechanical couplings. Comparisons with ex-perimental results reported in literatures are presented.

关键词： large electrostriction reversible switchings double hysteresis differential model

On the high temperature phase transition in Ba(Zr_(0.20)Ti_(0.80))O_(3) ceramic

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Journal of Advanced Dielectrics 2017年第4期7卷 22-28页

作者： K.P.Chandra A.R.Kulkarni K.Prasad Department of Physics S.M.College Bhagalpur 812001India Department of Metallurgical Engineering and Materials Science Indian Institute of Technology Mumbai 400076India University Department of Physics T.M.Bhagalpur University Bhagalpur 812007India

Temperature dependent X-ray diffraction(XRD)and dielectric properties of perovskite Ba(Zr_(0.2)Ti_(0.8))O_(3) ceramic prepared using a standard solid-state reaction process is presented.Along with phase transitions at low temperature,a new phase transition at high temperature(873℃ at 20 Hz),diffusive in character has been found where the lattice structure changes from monoclinic(space group:P2=m) to hexagonal(space group:P6=mmm).This result places present ceramic in the list of potential candidate for intended high temperature applications.The AC conductivity data followed hopping type charge conduction and supports jump relaxation model.The experimental value of d_(33)=98 pC/N was found.The dependence of polarization and strain on electric field at room temperature suggested that lead-free Ba(Zr_(0.2)Ti_(0.8))O_(3) is a promising material for electrostrictive applications.

关键词： Lead-free ceramic structure dielectric properties phase transition AC conductivity piezoelectric electrostriction

NONLINEAR ELECTROSTRICTIVE PROPERTIES OF PbZrO_(3):Sn SINGLE CRYSTALS WITH ANTIFERROELECTRIC PHASE TRANSITIONS

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Journal of Advanced Dielectrics 2011年第2期1卷 223-227页

作者： IRENA JANKOWSKA-SUMARA KRYSTIAN ROLEDER A.MAJCHROWSKI J.ŻMIJA Institute of Physics Pedagogical University ul.Podchorazych 230-084 KrakowPoland Institute of Physics University of Silesia ul.Uniwersytecka 440-007 KatowicePoland Institute of Applied Physics Military University of Technology ul.Kaliskiego 200-908 WarszawPoland

The electrostrictive properties above Te max represented by the field-related and polarization-related M and Q coefficients have been measured for PbZr_(1-x)Sn_(x)O_(3)single crystals with ani-ferroelectric phase transitions.The investigations presented in this paper have proved that the M_(11)(T)and Q_(11)(T)runs bring direct information of the pre-transitional effects connected with the co-existence of local polar objects with nonpolar matrix.Due to this co-existence,nonlinear Q_(11)(T)dependence in the neighborhood of T_(C)has been detected.Observed even in a wide tem-perature above T_(C),this co-existence is a natural feature of the material with ABO_(3)perovskite structure that undergoes structural transition to po lar phase.

关键词： Antiferroelectric phase transitions electrostriction polar regions

Stress fields in the electrostrictive material with an elliptic inhomogeneity

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Stress fields in the electrostrictive material with an ellip...

Solution of an elliptic inclusion in an electrostrictive solid

2011年全国压电和声波理论及器件应用研讨会

作者： Haie WEI~1 Quan Jiang~(1,2,*) Zhidong Zhou~3 1 College of Science,Nantong University,Nantong,226007 2 College of Civil Engineering,Nantong University,Nantong,226019 3 College of Materials,Xiamen University,Xiamen,361005

＜正＞Electrostrictive materials have been widely used in the smart structures for the high sensibility and quick response. The micro-cracks and inhomogeneities in these brittle electrostrictive ceramics are the major reasons of the failure. Thus,the fracture analysis attracts much attention.Therefore,the stress fields in the infinite electrostrictive plate

关键词： electrostriction Stress fields Elliptic inhomogeneity Series expansion

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Solution of an elliptic inclusion in an electrostrictive sol...

GENERAL SOLUTION OF STRESS FIELDS IN AN ELECTROSTRICTIVE MATERIAL WITH POINT CHARGE

2011年全国压电和声波理论及器件应用研讨会

作者： Yun LI~1 Cun-Fa GAO~(1,*) 1 State Key Laboratory of Mechanics and Control of Mechanical Structures, Nanjing University of Aeronautics & Astronautics,Nanjing 210016

＜正＞This paper presents the theoretical and numerical results for the plane problem of an elliptic inclusion in an infinite electrostrictive solid subjected to remote electric fields based on the Faber series method.Firstly,the general solutions are obtained for the electric fields inside the elliptical inclusion and the complex potentials in the solid,

关键词： electrostriction Elliptic inclusion Faber series

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GENERAL SOLUTION OF STRESS FIELDS IN AN ELECTROSTRICTIVE MAT...