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排序方式: 共有51条查询结果,搜索用时 15 毫秒
41.
Ana Maria POPESCU Kazimir YANUSHKEVICH Vasile SOARE Cristina DONATH Elena Ionela NEACSU Virgil CONSTANTIN 《高等学校化学研究》2018,34(1):113-118
The recovery of metals from a multi-component alloy obtained by crushing, melting and anodic dissolution of waste from electric and electronic equipment(WEEE) was investigated. The anodic dissolution of the alloy was carried out in an electrolysis cell with one copper cathode and a central cast anode, immersed in the electrolyte formed by choline chloride-ethylene glycol-iodine. The temperature of the electrolyte during the process was 343 K. Depending on the electrolysis parameters(current density and cell voltage), cathodic deposits of Sn, Pb and Zn of >99% purity were obtained. Cyclic voltammetry was used in order to determine the deposition potentials of the studied metals. The obtained metallic deposits were subject of determination of XRD, SEM/EDX and AFM in order to evidence the deposits structure and morphology. The experiments performed demonstrated the possibility of separating/selective recovery of metals from the multi-component alloy resulted from the waste from electrical and electronic equipment by anodic dissolution in ionic liquids. 相似文献
42.
S. S. Aplesnin V. V. Kretinin A. M. Panasevich K. I. Yanushkevich 《Physics of the Solid State》2017,59(4):667-673
The capacitance, inductance, and dissipation factor of the Gd x Bi1–x FeO3 films were measured in the temperature range of 100 K < T < 800 K in magnetic fields of up to 8 kOe at frequencies of 0.1–100 kHz. The magnetic susceptibility maxima in the low-temperature region and dependences of the relaxation time and inductance on prehistory of the films cooled in zero and nonzero magnetic fields are established. The giant increase in magnetic capacitance in the external bias electric field is found. The results obtained are explained by the domain structure transformation in external electric and magnetic fields. 相似文献
43.
Aplesnin S. S. Masyugin A. N. Sitnikov M. N. Ketsko V. A. Smirnova M. N. Yanushkevich K. I. 《JETP Letters》2020,112(10):636-641
JETP Letters - Hysteresis in the dependence of the electric polarization on the electric field has been found in polycrystalline cerium iron garnet films. The linear and quadratic magnetoelectric... 相似文献
44.
A. I. Galyas O. F. Demidenko G. I. Makovetski? K. I. Yanushkevich L. I. Ryabinkina O. B. Romanova 《Physics of the Solid State》2010,52(4):687-690
Regions of the existence of sulfide Gd
x
Mn1 − x
S and selenide Ti
x
Mn1 − x
Se solid solutions have been identified. Their electrical and thermoelectric properties have been studied in the temperature
range 80–900 K. It has been established that the substitution of Gd2+ and Ti2+ ions for Mn2+ cations initiates reversal of the type of charge carrier with respect to the starting compounds MnS and MnSe. The cation
substitution in solid solutions brings about a change from the hole conduction (α > 0) characteristic of the manganese monosulfide
and monoselenide to the electronic conduction (α < 0). 相似文献
45.
E. A. Chizhova A. I. Klyndyuk L. A. Bashkirov G. S. Petrov K. I. Yanushkevich 《Russian Journal of Applied Chemistry》2005,78(5):702-706
The crystal structure parameters of solid solutions YBaCuFe1 − x
CoxO5 (0 ≤ x ≤ 1) were determined, and their thermal stability, thermal expansion, conductance, thermoelectromotive force, dielectric properties, and magnetic sensibility were studied.__________Translated from Zhurnal Prikladnoi Khimii, Vol. 78, No. 5, 2005, pp. 716–720.Original Russian Text Copyright © 2005 by Chizhova, Klyndyuk, Bashkirov, Petrov, Yanushkevich. 相似文献
46.
O. B. Romanova S. S. Aplesnin A. M. Khar’kov A. N. Masyugin K. I. Yanushkevich 《Physics of the Solid State》2017,59(7):1314-1318
The electrical and galvanomagnetic properties of the Gd0.2Mn0.8Se solid solutions are investigated in zero magnetic field and in a field of 13 kOe in the temperature range of 80–400 K. The negative magnetoresistance below room temperature and hysteresis of the I–V characteristics are found. The change in the magnetoresistance sign and thermopower with increasing temperature is established. The carrier type is determined from the Hall constant; the difference between the thermopower and Hall coefficient signs at high temperatures is established. The experimental data are explained using the model of orbital ordering and spin-orbit interaction. 相似文献
47.
G. A. Petrakovskii L. I. Ryabinkina G. M. Abramova A. D. Balaev O. B. Romanova G. I. Makovetskii K. I. Yanushkevich A. I. Galyas 《Physics of the Solid State》2002,44(10):1925-1928
The magnetic, electrical, and thermal (derived from DTA data) properties of FexMn1?x S polycrystalline sulfides (0≤x≤0.38) synthesized based on α-MnS (NaCl cubic lattice) and exhibiting colossal magnetoresistance were studied. The studies were conducted at temperatures from 77 to 1000 K and magnetic fields of up to 30 kOe. As the degree of cation substitution in the FexMn1?x S system was increased, the magnetic order was found to change from antiferromagnetic to ferromagnetic. In the high-temperature domain (550–850 K), the samples undergo two phase transitions with critical temperatures $T_{c_1 }$ and $T_{c_2 }$ , which are accompanied by reversible anomalies in the magnetization and thermal (DTA) properties and by a semiconductor-metal transition. 相似文献
48.
Conditions are found under which a multicriteria problem with a finite set of vector estimates is solvable by means of the
linear criteria convolution (LCC) algorithm, that is, any Pareto optimum for the problem can be obtained as an optimum solution
to a one-criterion problem with an aggregated criterion defined as an LCC. Also, an algorithm is suggested that is polynomial
in dimension and reduces any problem with minimax and minimin criteria to an equivalent vector problem with the same Pareto
set solvable by the LCC algorithm.
Translated fromMatematicheskie Zametki, Vol. 62, No. 4, pp. 502–509, October, 1997.
Translated by V. N. Dubrovsky 相似文献
49.
S. S. Aplesnin L. I. Ryabinkina O. B. Romanova D. A. Balaev O. F. Demidenko K. I. Yanushkevich N. S. Miroshnichenko 《Physics of the Solid State》2007,49(11):2080-2085
This paper reports on the results of measurements of the conductivity in MnSe and MnTe polycrystalline samples under thermal cycling in the temperature range 80 < T < 300 K in magnetic fields of up to 5 kOe. Manganese selenide MnSe is found to exhibit a magnetoresistive behavior below the Néel temperature. The specific features revealed in the temperature dependences of the magnetic susceptibility and the electrical resistivity in some temperature ranges are accounted for in terms of magnetic ordering, which is mediated by the interaction of the pseudoorbital moments with spins. 相似文献
50.
Ana Maria Popescu Kazimir Yanuskevich Olga Demidenko Jose M. Calderon Moreno Elena Ionela Neacşu Virgil Constantin 《Central European Journal of Chemistry》2013,11(7):1137-1149
Thin films of Zn-Ni-P on a copper substrate were synthesized by electrodeposition from chloride baths. It was found that the diffraction reflections of the crystal structure of Zn-Ni-P thin layers occur at thicknesses d ≥ 5 µm. The X-ray diffraction studies results confirm the formation in the Zn-Ni-P films of ZnNi10P3 compound. The morphology of the obtained films was analyzed by Scanning Electron Microscopy (SEM) and Energy Dispersive X-ray Spectrometry (EDS). The films are continuous and have a typical topography with many homogeneous globular features. EDS confirmed the formation of Zn-Ni-P coating only in 2 samples with Zn:Ni:P atomic ratios of 1:8:4 and 4:8:3, respectively. X-ray Photoelectron Spectroscopy (XPS) revealed the chemistry and the thickness of the studied thin films. At room temperature and thickness d ≥ 5 µm the investigated thin layers exhibit high values of the specific magnetizations in the range (25–37) A m2 kg?1, leading to the potential use in devices, appliances and electronics. The Curie temperature values of the synthesized Zn-Ni-P films were determined. It was found that by heating Zn-Ni-P thin layers of thicknesses d ≥ 5 µm up to a temperature T=900 K an interaction was detected with the copper substrate leading to a lower specific magnetization. 相似文献