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Journal of Advanced Dielectrics 2020年第1期10卷 23-27页

作者： M.V.Talanov A.A.Pavelko l.a.reznichenko Research Institute of Physics Southern Federal University Av.Stachki 193 Rostov-on-Don 344090Russia

The electromechanical responses of multicomponent solid solutions Pb_(0.95)Ba_(0.05)(Mg_(1/3)Nb_(2/3))_(0.471)(Zn_(1/3)Nb_(2/3))_(0.102)(Ni_(1/3)Nb_(2/3))_(0.152)Ti_(0.275)O_(3)in low and high electric fields were *** both cases,significant electromechanical responses are *** particular,the maximum values of the large-signal piezoelectric coefficient d_(33)reach 1600 m/V at very low values of the electric field(≈5 kV/cm).The observed features of the electromechanical responses of the studied ceramics are advantages in terms of their possible application in actuators.

关键词： Relaxor ferroelectrics morphotropic phase boundary electromechanical response actuators

Effect of lithium carbonate modification on the ferroelectric phase transition diffusion in lead ferroniobate ceramics

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Journal of Advanced Dielectrics 2022年第1期12卷 31-35页

作者： A.A.Pavelko A.V.Pavlenko l.a.reznichenko Research Institute of Physics Southern Federal University Stachki Ave.194 Rostov-on-Don 344090Russia Federal State Budgetary Institution of Science“Federal Research Centre The Southern Scientific Centre of the Russian Academy of Sciences” Chekhova Str.41 Rostov-on-Don 344006Russia

The paper discusses the features of the effect of modification with lithium carbonate on the dielectric dispersion of lead ferroniobate *** modifier has been previously shown to change the ways of the recrystallization sintering and therefore reduce the sintering temperature of the ceramics,increase their average grain size,and improve their dielectric and piezoelectric *** this study,the emphasis is placed on the analysis of the diffusion effects of the ferroelectric phase transition upon such mod-ification considered from the standpoint of the chemical specifics of the modifier and its location in the structure of the parent compound.

关键词： Multiferroics ferroelectric relaxors ceramics dielectric dispersion

Structure,microstructure,dielectric and piezoelectric properties of(1−x-y)BiFeO_(3)-xPbFe_(0.5)Nb_(0.5)O_(3)-yPbTiO_(3)ceramics

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Journal of Advanced Dielectrics 2022年第1期12卷 45-52页

作者： E.I.Sitalo N.A.Boldyrev l.A.Shilkina A.V.Nazarenko A.V.Nagaenko l.a.reznichenko Research Institute of Physics Southern Federal University No 194 Stachki Ave.Rostov-on-Don 344090Russia Southern Scientific Center of RAS No.41 Chekhov Ave. Rostov-on-Don 344006Russia Institute of High Technology and Piezo Technic Southern Federal UniversityNo 10 Milchakov St.Rostov-on-Don 344090Russia

Ceramics of quasi-binary concentration section(x=0.50,0.1≤y≤0.2,Δy=0.025)of the ternary solid solution system(1−x−y)BiFeO_(3)-xPbFe_(0.5)Nb_(0.5)O_(3)-yPbTiO_(3)were prepared by the conventional solid-phase reaction *** using X-ray diffraction technique,the phase diagram of the system was constructed,which was shown to contain the regions of cubic and tetragonal symmetry and the morphotropic phase boundary between *** morphology,dielectric and piezoelectric properties of the selected solid solutions were *** highest piezoelectric coefficient d_(33)=260 pC/N was *** characteristics of ceramics revealed ferroelectric relaxor behavior,a region of diffuse phase transition from the paraelectric to ferroelectric phase in the temperature range of 350-500 K.

关键词： Dielectric properties perovskites multiferroics piezoelectric properties solid solutions

Structure and dielectric properties of (1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3)

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Journal of Advanced Dielectrics 2024年第1期14卷 82-88页

作者： E.V.Glazunova l.A.Shilkina A.S.Chekhova A.V.Nazarenko I.A.Verbenko l.a.reznichenko Research Institute of Physics Southern Federal University Rostov-on-Don344090Russia Faculty of Physics Southern Federal University Rostov-on-Don344090Russia Southern Scientific Center of the Russian Academy of Sciences Rostov-on-Don 344006Russia

The solid solutions of the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system were produced by the conventional ceramic technology using mechanical activation of the synthesized *** was found that in the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system at room temperature,a number of morphotropic phase transitions occur:rhombohedral!cubic!tetragonal!monoclinic *** introduction of a small amount of Na_(0.5)K_(0.5)NbO_(3) leads to an increase in the temperature stability of the dielectric properties of ceramics.A change in the relaxor properties of the solid solutions of the(1-x)Na_(0.5)Bi_(0.5)TiO_(3-x)Na_(0.5)K_(0.5)NbO_(3) system was *** increase in energy density and energy efficiency was found at additive 10 mol.%of Na_(0.5)K_(0.5)NbO_(3).

关键词： Ceramics lead-free materials mechanical activation dielectric properties energy storage

Dielectric spectroscopy of solid solutions based on sodium-potassium-cadmium in the temperature range (10 ÷ 900) K

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Journal of Advanced Dielectrics 2022年第4期12卷 1-4页

作者： M.O.Moysa K.P.Andryushin A.V.Pavlenko S.P.Kubrin l.a.reznichenko Research Institute of Physics Southern Federal University194 Stachki Avenue 344090Rostov-on-DonRussia Southern Scientific Centre Russian Academy of SciencesChehov av.41344000 Rostov-on-DonRussia

This paper studies the dielectric spectra of solid solutions(SS)of the system(1−x−y)NaNbO_(3)-xKNbO_(3)-yCdNb_(2)O_(6) y=0.075,x=0.05÷0.30 in the temperature range(10÷900)*** formation of a local maximum was established in the interval(260÷300)K at small x values,which,as KNbO3 increases,is gradually blurred and becomes an inflection *** in SS with x=0.05÷0.10,the shift of the maxima of dependencesε′/ε_(0)(T)andε″/ε_(0)(T),depending on the frequency of the electric field at the temperature ranges(300÷304)K and(258÷271)K,is not related to *** anomaly may indicate a crystallographic disorder to A and B *** conclusion is made about the expediency of using the obtained results for the development of functional ferroactive materials.

关键词： Dielectric spectroscopy lead-free ceramics KNN

Features of the electrophysical and mechanical properties of n-component ferroactive solid solutions of composition PZT-PZN-PMN

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Journal of Advanced Dielectrics 2021年第5期11卷 1-5页

作者： K.P.Andryushin I.N.Andryushina A.V.Cherpakov A.V.Popov I.A.Verbenko l.a.reznichenko Research Institute of Physics Southern Federal UniversityRostov-on-Don 344090Stachki str.194Russia Institute of Mathematics Mechanicsand Computer Science named after of I.I.Vorovich Southern Federal University Rostov-on-Don 344090Stachki str.200/1Russia Institute of Mathematics Mechanics and Computer Science Southern Federal UniversityRostov-on-Don 344090 Milchakova 8aRussia

Study of the fatigue endurance and mechanical strength of solid solutions of the PZT-PZN-PMN system,modified with Ba and Sr,corresponding to the formula(Pb_(1-a_(1)-a_(2))Sr_(a_(1))Ba_(a_(1)))[Ti_(x)Zr_(y)_(1-x-y)]O_(3),with a_(1)=0.02÷0.12;Da_(1)=0.02,a_(2)=0.0036÷0.073;x=0.385÷0.430,y=0.402÷0.447 is *** is shown that the evolution of the polarization characteristics with an increase in the number of repolarization cycles,n,is characterized by two sections:slow fatigue and logarithmic *** was found that an increase in the strontium content shifts the beginning of the logarithmic stage towards to the large *** is shown that an increase in the average grain size decreases the mechanical strength.A conclusion is made about the expediency of using the obtained data in the development of devices operating in power modes.

关键词： PZT-PZN-PMN P-E loops fatigue endurance mechanical properties

Dielectric and piezoelectric properties of modified lead-free NaNbO_(3)-KNbO_(3)/PVDF composite ceramics

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Journal of Advanced Dielectrics 2021年第5期11卷 54-62页

作者： Y.I.Yurasov M.I.Tolstunov A.V.Nazarenko A.A.Pavelko A.V.Yudin I.A.Verbenko l.a.reznichenko Federal Research Centre The Southern Scientific Centre of the Russian Academy of Sciences(SSC RAS)41 Chekhova Street Rostov-on-Don 344006Russia Southern Federal University 105/42 Bolshaya Sadovaya Street Rostov-on-Don 344006 Russia

This work presents the results of study of the electrophysical properties of composite polymer ceramics(1−x)[KNN-lTSN]-xPVDF at x=25 vol.%and x=50 vol.%in the temperature range of T=20-160℃and frequency range of f=2×10^(1)-2×10^(6)*** concentration dependence of piezomodules of the studied materials has been analyzed as a function of temperature.X-ray measurements have also been carried out.A model of description of revealed dielectric parameters dispersion in the material is *** nonclassical modified Havriliak-Negami model written for complex electrical conductivity has been used to describe the temperature-frequency *** is shown that the dielectric spectra of the studied composites include three relaxation processes in the temperature ranges of 40-80℃,80-120℃and 120-150℃,which were confirmed by the dynamics of changes in the dependences of g′(f),tgδ(f),M′(f),M″(f)and M″(M′).All three processes are almost exactly described by this model and well correlated with the studies by other researchers of the composites based on *** results of this work show that the use of such experimental model is suitable for describing the complex dielectric spectra of any nonlinear dielectrics including composite materials.

关键词： Composites PVDF KNN ferroelectrics relaxation Havriliak-Negami model complex conductivity

Microstructure features of the BST/(Mg,ln)-ceramic

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Journal of Advanced Dielectrics 2022年第2期12卷 19-24页

作者： K.P.Andryushin A.V.Nagaenko S.V.Khasbulatov l.A.Shilkina E.V.Glazunova S.I.Dudkina I.N.Andryushina l.a.reznichenko Research Institute of Physics Southern Federal University 194 Stachki Str.Rostov-on-Don 344090Russia Institute of High Technology and Piezo Technic Southern Federal University 10 MilchakovaRostov-on-Don 344090Russia Faculty of Physics and Information-Communication Technologies 32 Sheripova Str. Grozny 364024Russia

Solid solutions of the composition Ba_(1-x-y)(Mg,ln)_(x)SryTiO_(3)(x=0.01;0.025;0.04;y=0.20;0.50;0.80;ln=la,Pr,Nd,Sm,Eu,Gd,Tb,Dy,Ho,Er,Tu,Yb)were prepared by two-stage solid-phase synthesis followed by sintering using conventional ceramic *** influence of rare-earth elements on the microstructure of the prepared ceramic samples was *** was found that regardless of the type of modifiers introduced,the grain landscape of the studied solid solutions with different amounts of SrTiO_(3)is refined(in the initial system,the average grain size,d,at x=0.20 is 6μm;at x=0.50 is 4μm;at x=0.80 is 18μm)to crystallite sizes not exceeding(2-3)μm,and *** using of mechanical activation procedures leads to an even greater decrease in the size and an increase in the density of *** increasing in the concentration of modifiers in each group(within the considered range of dopant variation)against the background of such a fine-grained structure has little effect on the dynamics of changes in *** is concluded that it is advisable to use the data obtained in the development of functional materials based on BST/(Mg,ln)and devices with the participation of these compositions.

关键词： Ceramics BST microstructure rare-earth elements

Ferroelectric solid solutions with perovskite- and columbite-type components: From structures formation to domain and hysteresis phenomena

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Journal of Advanced Dielectrics 2023年第2期13卷 13-23页

作者： M.O.Moysa V.Yu.Topolov K.P.Andryushin A.V.Nagaenko l.A.Shilkina M.V.Il’ina O.I.Soboleva S.Sahoo l.a.reznichenko Research Institute of Physics Southern Federal University194 Stachki Avenue Rostov-on-Don 344090Russia Department of Physics Southern Federal University5 Zorge Street Rostov-on-Don 344090Russia Institute of High Technologies and Piezotechnics Southern Federal University 10 Milchakov StreetRostov-on-Don 344090Russia Institute of Nanotechnologies Electronics and Equipment Engineering Southern Federal UniversityTaganrog 347922Russia Research laboratory of Functional Nanomaterials Technology Southern Federal University Taganrog 347922Russia

The paper reports results on the complex study on ferroelectric ceramics that represent solid solutions containing components with a perovskite-type or columbite-type *** solutions of a three-component(1−x−y)NaNbO_(3)−xKNbO_(3)−yCdNb_(2)O_(6) system are manufactured at x=0.05-0.20 and y=*** structures in ceramic grains are *** consistency between experimental and calculated results is examined for coexisting phases split into non-180°domains(mechanical twins)in the solid solution with x=0.15.A correlation between the internal structure(crystal,domain,granular,and defect)and fundamental electromechanical and polarization properties is stated for the studied three-component solid solutions.

关键词： Ferroelectric materials KNN elastic matching crystal structure domain structure electrophysical properties.