检索结果-南通市图书馆

Journal of Advanced Dielectrics 2020年第4期10卷 47-54页

作者： Vitaly Yu.Topolov Ashura N.Isaeva Department of Physics Southern Federal University 5 Zorge Street344090 Rostov-on-DonRussia

A system of hydrostatic parameters is studied in novel 2-0-2 composites that contain two lead-free piezoelectric single-crystal *** ferroelectric domain-engineered alkali niobate-tantalate-based single-crystal layer promotes large values of the piezoelectric coefficients g^(*)33 and g^(*)h,hydrostatic squared figure of merit d^(*)hg^(*)h,and hydrostatic electromechanical coupling factor k^(*)h of the composite wherein the 0-3 Li_(2)B_(4)O_(7)single crystal/polyethylene layers are adjacent to the aforementioned single-crystal ***,the role of the elastic anisotropy of the 0-3 layer is *** orientation effect concerned with rotations of the crystallographic axes of the piezoelectric Li_(2)B_(4)O_(7)single crystal in the 0-3 layer is first *** is shown that the orientation of the crystallographic axis Z of the Li_(2)B_(4)O_(7)single crystal in the polymer matrix strongly influences the piezoelectric properties and hydrostatic parameters of the *** of the so-called waterfall-like orientation dependences of the hydrostatic parameters are *** composite based on the domain-engineered[Li_(x)(K_(1-y)Na_(y)_(1-x)](Nb_(1-z)Ta_(z)TO_(3):Mn single crystal is of interest due to g^(*)h~10^(2)mV·m/N,d^(*)hg^(*)h~10^(-10)Pa-1,and k^(*)h≈0.70-0.75 in the studied volume-fraction and orientation ranges,and these hydrostatic parameters are to be taken into account in the field of piezotechnical,hydroacoustic,and energy-harvesting applications.

关键词： Lead-free piezo-active composite piezoelectric properties hydrostatic parameters orientation effect

Electrical properties of 0-30.5(Ba_(0.7)Ca_(0.3))TiO_(3)-0.5Ba(Zr_(0.2)Ti_(0.8))O_(3)/PVDF nanocomposites

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2018年第4期8卷 35-42页

作者： Bablu K.Pandey Amit Kumar K.P.Chandra A.R Kulkarni S.K Jayaswal K.Prasad University Department of Physics T.M.Bhagalpur University Bhagalpur 812007 India Department of Mechanical Engineering Birla Institute of Technology Mesra(Patna Campus) Patna 800014India Department of Physics S.M.College Bhagalpur 812001India Department of Metallurgical Engineering and Materials Science Indian Institute of Technology Mumbai 400076 India

Lead-free x(0.50(Ba_(0.7)Ca_(0.3)TiO_(3)-0.50Ba(Zr_(0.2)Ti_(0.8)O_(3)-(1-x)PVDF ceramic–polymer nanocomposites with x=0.025,0.05,0.10,0.15,0.20,0.25 were prepared using melt-mixing *** distribution of nanoceramic filler particles(0.50(Ba_(0.7)Ca_(0.3)TiO_(3)-0.50Ba(Zr_(0.2)Ti_(0.8)O_(3)in the PVDF matrix were examined using scanning electron *** analysis indicated the negative temperature coefficient of resistance character of all the test *** concentrationdependent piezoelectric coefficient(d33Þdata followed exponential growth types of *** data for ac conductivity were found to obey Jonscher’s power *** correlated barrier hopping(CBH)model was found to explain the mechanism of charge transport occurring in the *** low value of loss tangent(-10^(-2))along with the high value of d_(33) foreshadowing the prospect of present nanocomposite is a better nonlead option for piezo-sensing/detection applications,especially in bio-medical area.

关键词： Random composite medium dielectric properties piezoelectric properties impedance analysis.

Interdiscipline between optoelectronic materials and mechanical sensors:Recent advances of organic triboluminescent compounds and their applications in sensing

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Central South University 2021年第12期28卷 3907-3934页

作者： SUN Hao-dong DU Bei-bei WU Ya-zhang WANG Hai-lan ZHANG Xia-yu WANG Juan ZHANG Si-min WEI Shan-shan YU Tao Frontiers Science Center for Flexible Electronics(FSCFE)and X i’an Institute of Flexible Electronics(IFE) Northwestern Polytechnical UniversityXi’an 710072China Queen Mary University of London Engineering School Northwestern Polytechnical UniversityXi’an 710119China School of Packaging and Materials Engineering Hunan University of TechnologyZhuzhou 412007China

Triboluminescence,also as known as mechanoluminescence,is an attractive optical behavior that means the light emitted from specific organic and inorganic materials when they are subjected to external forces,such as crushing,deformation,cleaving,*** triboluminescent materials show great potential for applications in sensing,such as stress sensing,damage ***,the triboluminescent mechanism of organic materials should be pushed further as well as their *** this review,we summarized the history of development and possible mechanism of organic triboluminescent materials,and discussed various applications in sensing *** the same time,inspired by the existing research progress in inorganic triboluminescent materials,we proposed the flourishing development prospects of organic triboluminescent materials in stress sensors,movement monitoring,imaging stress distribution,visualization of crack propagation,structural diagnosis,and other fields.

关键词： triboluminescence crystal engineering stress imaging piezoelectric properties

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

弛豫铁电单晶PMNT的生长及压电性能

人工晶体学报 2000年第S1期29卷 87-页

作者： LUO Hao su, XU Gui sheng, XU Hai qing, QI Zhen yi, ZHONG Wei zhuo,YIN Zhi wen (Laboratory of Functional Inorganic Materials,Shanghai Institute of Ceramics, Chinese Academy of Sciences,Shanghai 201800,China) (E-mail:hluo@***)

It is difficult for the growth of relaxor ferroelectric single crystal (1 x ) Pb(Mg 1/3 Nb 2/3 )O 3 x PbTiO 3 (abbreviated as PMNT).The first reason is that there are four oxides as raw materials which are easily result in the nonstoichiometry and inhomogeneity for the single crystals,the second is that the pyrochlore phases appear easily for general growth condition that will reduce the dielectric and piezoelectric performance of PMNT single crystals,and the third is that the platinum crucible is easily leaked at the melting temperature of PMNT.A feasible technique has been used for the growth of PMNT single crystals after we researched the stability,structure and relation of PMN PT phases at high *** we can fabricate the large size and high quality of PMNT single crystals by a modified Bridgman technique.

关键词： ferroelectric single crystal PMNT Bridgman method piezoelectric properties

SYNTHESIS,piezoelectric,DIELECTRIC AND CONDUCTIVITY STUDIES ON Dy_(2)O_(3)SUBSTITUTED(Bi_(0.94)Na_(0.94))_(0.5)Ba_(0.06)TiO_(3)CERAMICS

维普期刊数据库

同方期刊数据库评论

在线全文

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2011年第4期1卷 455-464页

作者： K.SAMBASIVA RAO HAILEEYESUS WORKINEH A.SWATHI B.S.KALYANI Department of Physics Andhra University Visakhapatnam 530003India

Polycrystalline(Bi_(0.94)Na_(0.94))_(0.5)Ba_(0.06)TiO_(3)ceramics(r=0,0.04,and 0.08,designated as BNBT6:BNBT6:4Dy and BNBT6.8Dy,respectively)were prepared by conventional high tem-perat ure sintering *** X-ray difraction patterms show pure perovskite structure with no secondary *** parameters and unit cell volumes have decreased due to Dy_(2)O_(3)*** micrographs revealed denser samples(prel>97%)with wmiformly distributed *** room temperature piezoelectric properties of Dy_(2)O_(3)substit ut ed sample at a=0.04 wererelatively higher.d_(33)=147 pC/N,k_(p)=28%and Q_(m)=-*** samples exhibited infinitesimalchange in thickness(α15 nm)to an applied voltage of 100 V,which could be utilized in *** behavior and broad dielectric maxima with diffuse phase transition wereobser *** value of RT dielectric constant has increased while dielectric loss was decreased dueto Dy_(2)O_(3),*** in the materials obeys Jonscher's universal power *** conductivity in the low frequency region is associated with short range translational hopping whileit is associated with the reorientational hopping in the high frequency *** charge carrier concentration term remained constant over the entire temperature range of(30-500°C).

关键词： X-ray diffraction relaxor ferroelectrics dielectric properties piezoelectric properties conductivity

The growth status of relaxor-based ferroelectric crystals and their development trends

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2014年第1期4卷 62-68页

作者： Guisheng Xu Danfeng Yang Jinfeng Liu Ying Liu Xiaxia Chen Key Laboratory of Transparent Opto-Functional Inorganic Materials Chinese Academy of Sciences Shanghai Institute of Ceramics Chinese Academy of SciencesJiading District Shanghai 201899P.R.China

Our progress in the growth of ternary system Pb(In_(1/2)Nb_(1/2))O_(3)–Pb(Mg_(1/3)Nb_(2/3))O_(3)–PbTiO_(3)(PIMNT)crystals and reviews on the possible developing trends in the piezoelectric crystals are *** PIMNT crystals with 3 inches in diameter have been grown by using a modified Bridgman ***,Mn-doped PIMNT crystals have also been *** crystals exhibit Curie temperature Tc190C,rhombohedral–tetragonal phase transition temperature Trt>100℃ and coercive field Ec5:0–7.0 kV/cm on(001)***,higher piezoelectric constant d_(32)-1500–2200 pC/N,d_(15)4000–6000 pC/N and coercive field E_(c)-7:0–9.0 kV/cm have been achieved on(110)*** development trends of relaxor-based ferroelectric crystals are suggested to grow novel crystals with high rhombohedral–tetragonal phase transition temperature T_(rt)>150-160℃ and/or high coercive field Ec and mechanical quality factor Q_(m),to promote growth efficiency of PIMNT crystals and to create new growth methods fitting for the growth of metastable or instable crystals.

关键词： PIMNT crystals Bridgman technique piezoelectric properties relaxor-based ferroelectric single crystals.

Pb(Zn_(1/3)Nb_(2/3))O_(3)–PbTiO_(3) single crystal and device development

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2014年第1期4卷 1-5页

作者： L.C.Lim S.Zhang Y.X.Xia D.H.Lin N.H.L.Goh National University of Singapore Department of Mechanical Engineering Kent Ridge Singapore 117576 Microfine Materials Technologies Pte.Ltd. 10 Bukit Batok Crescent#06-02The SpireSingapore 658079

This paper describes recent device developments with relaxor ferroelectric Pb(Zn_(1/3)Nb_(2/3))O_(3)-PbTiO_(3)(PZN–PT)single crystals carried out at Microfine Materials Technologies ***,***[011]-poled transverse cuts of PZN–PT single crystals and the results on the effect of electric field and axial compressive stress on the rhombohedral-to-orthorhombic(R–O)phase transformation behavior of such cuts are presented and *** single crystal devices described include a compact lowfrequency broadband power-efficient underwater tonpilz projector,high sensitivity shear accelerometers and acoustic vector sensors(AVS).The unique characteristics offered by these PZN–PT single crystal devices are highlighted,which serve as examples of newgeneration piezoelectric devices and systems for a wide range of demanding applications.

关键词： PZN-PT single crystal piezoelectric properties underwater projector accelerometer acoustic vector sensor.

Crystal structure,microstructure,electrophysical properties,and thermally induced aging of PZT-CdNb_(2)O_(6)ceramics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2022年第5期12卷 1-11页

作者： Andryushin Konstantin Pavelko Alexey Sahoo Sushrisangita Shilkina Lidiya Nagaenko Alxandr Andryushina Inna Moysa Maksim Reznichenko Larisa Research Institute of Physics Southern Federal University Rostov-on-Don344090Stachki str.194Russia Institute of High Technology and Piezo Technic Southern Federal University Rostov-on-Don344090Milchakova 10Russia

Solid solution samples of the three-component system(1−x)Pb(Ti_(0.5)Zr_(0.5))O_(3)−xCdNb_(2)O_(6)with x=0.0125-0.0500,Δx=0.0125 were obtained by solid phase synthesis followed by sintering using conventional ceramic *** crystal structure,microstructure,electrophysical,and thermophysical properties of these ceramics have been *** is shown that all studied solid solutions can be divided into two groups(with x=0.0125 and with x>0.0125),characterized by different characteristics of the change in properties with variations in external *** is probably due to the transition from a perovskite-type structure with a tetragonal(T)unit cell to inhomogeneous solid solutions consisting of a series of T-phases with similar cell parameters.A conclusion is made about the expediency of using the data obtained in the development of similar materials for devices based on them.

关键词： PZT CdNb_(2)O_(6) XRD microstructure piezoelectric properties thermophysical properties phase transition fatigue

Orientation dependence on piezoresponse of lead-free piezoelectric sodium bismuth titanate epitaxial thin films

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2023年第4期13卷 41-47页

作者： Jinyan Zhao Wei Ren Zhe Wang Gang Niu Lingyan Wang Yulong Zhao Electronic Materials Research Laboratory Key Laboratory of the Ministry of Education&International Center for Dielectric Research School of Electronic Science and EngineeringXi’anP.R.China State Key Laboratory for Mechanical Manufacturing System Xi’an Jiaotong University Xi’an 710049P.R.China

Lead-free piezoelectric sodium bismuth titanate((Bi0.5Na0.5)TiO3,BNT)thin films were epitaxially grown onto(001)-,(110)-,and(111)-oriented Nb:SrTiO3(STO)single crystal substrates prepared by sol-gel *** oriented growth in(001),(110),and(111)BNT thin films was obtained in this work benefiting from the lattice match between the BNT film and the STO *** different growth models in thin films with various orientations result in various surface morphologies dependent on the film *** piezoresponse of the BNT thin films was represented exhibiting a strong orientation dependence that(110)>(001)>(111).This is contributed by the various domain switching contribution related to the crystal symmetry and polarization distribution in the three oriented thin films.

关键词： Sodium bismuth titanate lead-free orientation dependence thin films piezoelectric properties

Processing, phase transitions, and dielectric properties of BSPT ceramics

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Journal of Advanced Dielectrics 2013年第3期3卷 43-47页

作者： E.D.Politova G.M.Kaleva A.V.Mosunov A.H.Segalla A.E.Dosovitskiy A.L.Mikhlin L.Ya.Karpov Institute of Physical Chemistry Obukha s.-st. 3-1/12Moscow 105064Russia ELPA Company Panfilovsky pr.10ZelenogradMoscow 124460Russia IREA Bogoroditskii val3Moscow 107076Russia

Solid solutions on the base of composition from morphotropic phase boundary(1-x)BiScO_(3)–xPbTiO_(3) with x=0.64,0.645,0.65 were prepared from nitrates *** in phase content,structure parameters,microstructure,dielectric and piezoelectric properties of dense ceramic samples were *** first-order phase transitions were observed at temperatures near 700 *** influence of the processing conditions on the morphology,temperature of phase transitions,and dielectric parameters was *** some ceramics effect of dielectric relaxation was observed at high *** effect was explained by the contribution from ionic transport due to the oxygen vacancies creation during high temperature sintering.

关键词： BiScO_(3)-PbTiO_(3)solid solutions morphotropic phase boundary phase transitions ferroelectric piezoelectric properties oxygen vacancies dielectric relaxation