检索结果-南通市图书馆

propulsion and power Research 2024年第1期13卷 1-11页

作者： N.I.Cherkashina V.I.pavlenko M.M.Mikhailov A.N.Lapin S.A.Yuriev R.V.Sidelnikov D.S.Romanyuk Belgorod State Technological University named after V.G.Shoukhov Kostyukov Str.46Belgorod 308012Russia Tomsk State University of Control Systems and Radioelectronics 40Prospect LeninaTomsk 634050Russia

This paper presents the results of studying the surface properties changes of a ther-moregulating coating based on polystyrene and silicaﬁller after proton irradiation with an en-ergy of 50 keV at afluence of 3�1015 cm�*** proton irradiation,the values of the contact angle of wetting with water increase by 3.5%and 14.9%for polystyrene and the coating,*** free surface energy(energy of the surface layer)of polystyrene and the coat-ings before and after proton irradiation was calculated using the Owens-Wendt-Rabel-Kaelble *** was a signiﬁcant increase in the polarity of the polystyrene surface(gp increased by a factor of 2.2)after proton *** the coating,an increase in gp by a factor of 3.89 was observed after proton *** changes in the coating were presented by IR Fourier spectroscopy.A slight decrease in the absorption intensity of all characteristic bands compared to the unirradiated sample was *** was found that the irradiation of the coating with protons led to the formation of macromolecules with hydroxyl,carbonyl,and carboxyl bonds,as well as the formation of dimeric and oligomeric siloxane *** was also found that after irradiation of a pure polystyrene sample with protons,the value of the solar absorption as increased by only 4.2%;whereas for the coating with silicaﬁller,the value of as increased by 28.6%.

关键词： Thermal control coating proton irradiation Hydrophobicity Free surface energy Radiation crosslinking

Studying of dielectric spectra of YCu_(0.15)Mn_(0.85)O_(3)solid solution with the use of complex conductivity

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1期12卷 19-23页

作者： A.V.Nazarenko A.V.pavlenko Y.I.Yurasov Federal Research Centre The Southern Scientific Centre of the Russian Academy of Sciences(SSC RAS) 41 Chekhova Street Rostov-on-Don 344006Russia Research Institute of physics Southern Federal University 105/42 Bolshaya Sadovaya Street Rostov-on-Don 344006 Russia

This work presents the results of studying the electrophysical properties of the YCu_(0.15)Mn_(0.85)O_(3)solid solution in the range of temperatures of T=26-400°C and frequency range of f=102-105 Hz.A model description of the revealed dispersion of dielectric parameters in the material is *** nonclassical modified Havriliak-Negami model written for complex electrical conduc-tivity was used as an approximation *** is shown that the application of this model almost exactly describes the frequency behavior of the dielectric constantε′/ε0(f),the dielectric loss tangent tgδ(f)as well as the real and imaginary parts of complex conductivityγ′(f)andγ′′(f).The results of this work are an important step in identifying the opportunities and understanding the applications of this model.

关键词： Multiferroics yttrium manganite relaxation Havriliak-Negami model complex conductivity

Influence of the operating temperature on the ageing and interfaces of double layer polymer electrolyte solid state Li metal batteries

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

Nano Research 2023年第6期16卷 8377-8384页

作者： Mikel Arrese-Igor María Martinez-Ibañez Ander Orue Ekaterina pavlenko Erwan Dumont Michel Armand Frédéric Aguesse pedro López Aranguren Centre for Cooperative Research on Alternative Energies(CIC energiGUNE) Basque Research and Technology Alliance(BRTA)Alava Technology ParkAlbert Einstein 48Vitoria-Gasteiz 01510Spain University of the Basque Country(UpV/EHU) Barrio Sarrienas/nLeioa 48940Spain Saft 111 Boulevard Alfred DaneyBordeaux Cedex 33074France

Solid-state lithium metal batteries(SSLMBs)are considered an auspicious technology to develop high energy density and safe energy storage *** double layer polymer electrolyte(DLpE)is a rational approach for engineering high-performance SSLMBs addressing electrolyte requirements with specifically designed polymers at the positive electrode and as *** this work,SSLMBs were assembled with poly(propylene carbonate)(ppC),offering stability toward oxidation at the positive electrode,and a gel polymer electrolyte with polyethyleneglycol dimethylether(pEGDME)as separator,offering high ionic conductivity at low temperature and sufficient interfacial stability with Li *** electrochemical properties and performance of cells with LiFepO_(4) and Li[Ni_(0.6)Mn_(0.2)Co_(0.2)]O_(2) positive electrodes are thoroughly investigated as function of the operating temperature by using a host of characterization ***-voltage cells with an areal capacity of 0.7 mAh·cm^(−2)cycled at 40℃ exhibit a higher capacity retention than the cells cycled at 70℃.To understand such differences,a three-electrode setup is applied to discriminate anodic processes from cathodic as function of the *** elucidate the ageing and interfacial evolution for DLpE cells with gel polymer electrolytes paving the way for building performance solid state batteries.

关键词： double layer polymer electrolyte solid-state lithium metal battery gel polymer electrolyte high voltage interfacial study

preparation of crystalline Mg(OH)2 nanopowder from serpentinite mineral

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

International Journal of Mining Science and Technology 2018年第3期28卷 499-503页

作者： V. Sirota V. Selemenev M. Kovaleva I. pavlenko K. Mamunin V. Dokalov M. Yapryntsev Belgorod State National Research University Belgorod 308015 Russia Voronezh State University Voronezh 394006 Russia Belgorod State Technological University named after V.G. Shoukhov Russia

In this paper we describe a route to produce crystalline Mg（OH）2 nanopowders from serpentinite ore distributed in the Halilovskiy array （Russia, Orenburg region）. An efficient extraction route consisting of treatment on serpentinite in 40% HNO3 at 80 ℃followed by NH4OH titration for Mg（OH）2 precipitation was demonstrated. In this study, crystalline Mg（OH）2 nanopowders have been synthesized by solvothermal reaction method using （Mg（NO3）2·6H2O） which were obtained from serpentinite, NH4OH as a precipitator, and hydroxyethylated nonylphenol as surface-active substance. Microstructure and phase composition of samples were investigated employing scanning electron microscopy （SEM） and transmission electron microscopy （TEM）, X-ray phase analysis （XRD）, and inductively coupled plasma optical emission spectroscopy （ICp-OES）. XRD reveals that Mg（OH）2 nanopowder with high purity has the brucite structure. It was found that crystalline Mg（OH）2 nanopowders exclusively consist of lamellar-like structures and the sizes of Mg（OH）2 are 30-265 nm length or width.

关键词： Serpentinite Nitric acid leaching Magnesium hydroxide Solvothermal reaction method Crystalline Mg(OH)2 nanopowder

Obtaining,structure,microstructure and dielectric characteristics of ceramics and thin films of ferro-piezoelectric materials based on the pZT system

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 2020年第1期10卷 16-22页

作者： Inna Andryushina Anatoliy pavlenko Sergey Zinchenko Konstantin Andryushin Lidiya Shilkina Ekaterina Glazunova Alexandr Nagaenko Daniil Stryukov Hizir Sadykov Larisa Reznichenko Laboratory of Intelligent Materials plasma Technologies and Innovative Multifunctional Systems Research Institute of physics Southern Federal University Rostov-on-Don344090Stachki Str.194Russia Southern Scientific Centre Russian Academy of Sciences Rostov-on-Don344006Chehova Str.41Russia Institute of High Technology and piezo Technic Southern Federal University Rostov-on-Don 344090Milchakova 10Russia Faculty of physics and Information-Communication Technologies Grozny 364024Sheripova Str.32Russia

This paper presents the results of studies of the structure,microstructure,dependences of the piezoelectric properties on the electric field(dielectric hysteresis loops,reversible nonlinearity,deformation characteristics)and dielectric properties of the ceramic material pCR-13(based on the pZT system)in the temperature range 300-900K and frequencies of an alternating electric field(25÷2·10^(6))*** character of the obtained dependences made it possible to attribute pCR-13 to ferro-hard *** the HF cathodic sputtering method,pCR-13 thin films were fabricated on Si(001)*** is shown that they are polycrystalline textured,while in comparison with bulk material,the film contains tensile stresses of the unit cell in the plane of the substrate and compresses in the perpendicular direction with the valueε_(33)=-*** capacitance-voltage characteristics of the Al/pCR-13/Si/Al heterostructure were *** reasons for the revealed patterns are discussed.

关键词： Structure dielectric properties p-E loops S33-E curves thin films

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

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

Optical properties of Sr_(x)Ba_(1−x)Nb_(2)O_(6)nanoscale films(x=0.5 and 0.61)grown by RF-cathode sputtering in an oxygen atmosphere

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 2021年第5期11卷 48-53页

作者： S.V.Kara-Murza K.M.Zhidel N.V.Korchikova Yu.V.Tekhtelev A.V.pavlenko L.I.Kiseleva Lugansk State pedagogical University No.2 Oboronnaya Street Lugansk 91000Ukraine Research Institute of physics Southern Federal University No.194 Stachki AvenueRostov-on-Don 344090Russia Federal State Budgetary Institution of Science“Federal Research Centre The Southern Scientific Centre of the Russian Academy of Sciences”No.41 Chekhova Street Rostov-on-Don 344090Russia

The research findings of the phase composition,nanostructure and optical properties of strontium-barium niobate thin films are ***_(x)Ba_(1−x)Nb_(2)O_(6)nanosized films(x=0.5 and 0.61)were characterized by XRD,SEM and AFM *** multi-angle ellipsometry and spectrophotometry were used to determine the optical parameters(refractive index,its dispersion,and thickness of the damaged surface layer)of thin *** was shown that SBN-50 and SBN-61 thin films were grown c-oriented on Al_(2)O_(3)(0001)and heteroepitaxial on MgO(001)*** increase of refractive index,approaching its maximum value in the bulk material for a given composition as the film thickness increases,is observed.

关键词： Ellipsometry optical parameters strontium-barium niobates thin films

STUDY OF WASTE FROM THE ABAKAN THERMAL pOWER pLANT WITH THE pURpOSE OF ITS pOSSIBLE USE IN CEMENTLESS CONCRETE

在线全文

维普期刊数据库

学校读者我要写书评

暂无评论

STUDY OF WASTE FROM THE ABAKAN THERMAL POWER PLANT WITH THE ...

preparation and properties of 0.5BiFeO_(3)-0.5pbFe_(0.5)Nb_(0.5)O_(3)ceramics and polycrystalline films

第四届北京国际水泥与混凝土会议

作者： S. pavlenko Yu. Bazhenov V.Malyshkin Siberian State Academy of Mining & Metallurgy. Nowokuznetsk RUSSIA654007

Creation of fine cementless ash-slag concrete based on high-calcium ash and slag from thermal power plants is the part of a Federal programme of Environment protection. Long-term investigations into physical properties, chemical analysis, silicate and ferriferous decomposition, radionuclides contents of fly ash and slag from the Abakan thermal power plant were performed. The results were compared with up-to-date State Standards (25818-91, 26844-85) and Specification (39-70.10898-88). Deviation from the requirements of the State Standards and Specification were revealed, methods of treatment of ash (grinding to the fineness of 450m2/kg) and slag (grinding to sand with a particle size of 0 to 5 mm) as well as technique for producing high-performance cementless concrete (introduction of microsilica, double heat treatment) were suggested. The work underwent the examination by the NIIZhB and Moscow State University of Construction and was patented (patent N 2065420. Concrete Mixture). The project for by Committee for Nature preservation, Khakass Republic, was developed.

关键词：

来源： cnki会议评论

在线全文

cnki会议

学校读者我要写书评

暂无评论

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

作者： K.M.Zhidel A.V.pavlenko Research Institute of physics Southern Federal University No.194 Stachki AvenueRostov-on-Don 344090Russia Federal Research Centre The Southern Scientific Centre of the Russian Academy of Sciences No.41 Chekhova street Rostov-on-Don 344090Russia

In this paper,we report the successful growth of 0.5BiFeO_(3)-0.5pbFe_(0.5)Nb_(0.5)O_(3)/SrTiO_(3)/Si(001)heterostructure using RFcathode sputtering in an oxygen *** deposited films have been investigated by X-ray diffractometry and spectroscopic ellip-sometry(SE).0.5BiFeO_(3)-0.5pbFe_(0.5)Nb_(0.5)O_(3)films on silicon substrates with a strontium titanate buffer layer are single-phase,polycrystalline with a texture in the 001 *** unit cell parameters calculated in the tetragonal approximation were c=4.005±0.001Å;a=3.995±0.001Å.The presence in the films of small unit cell deformation arising from different unit cells parameters of the film and substrate is *** properties and capacitance-voltage characteristics have been *** ellipsometric parameters have been obtained.

关键词： Relaxation non-Debye type process phase transition high-temperature multiferroic polycrystalline thin films