Effect of Phase Composition of Superconductor Y3Ba5Cu8O18+δ on Its Conducting Characteristics

Pilipenko, A. O.; Nedilko, S.; Dziazko, A. G.; Fesich, I. V.

doi:10.1007/s11237-017-9488-8

Cited by 4 publications

(2 citation statements)

References 22 publications

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“…The microdeformations of the crystal lattice for the samples increase in a number: C-sample -A-sample -B-sample. This fact correlates well with the results of X-ray phase analysis, because most impurities in the sample obtained by co-precipitation of hydroxocarbonates, slightly less in the solid-phase sample [14]. Obviously, impurities cause more significant deformations and microdeformations.…”

Section: Tablesupporting

confidence: 87%

DETERMINATION OF THE SIZES OF PARTICLES OF SUPERCONDUCTING CUPRATE Y3Ba5Cu8OX BY MEANS OF DIFFERENT METHODS

Bolotnikova¹

2020

Technology transfer: fundamental principles and innovative tech

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The superconducting cuprate Y3Ba5Cu8Ox was obtained with the help of sol-gel technology (sample C), co-precipitation of hydroxocarbonates (sample B) and solid-phase synthesis methods (A). Based on the results of scanning electron microscopy and methods based on the analysis of X-ray diffraction data: the Williamson-Hall construction and the Scherrer formula, features of the microstructure of the synthesized samples are established. The smallest particle size has a sample that has been synthesized by the sol-gel method. The tendency to aggregation and sedimentation for this sample is the smallest. The sample obtained by the co-precipitation method has larger grains and a higher tendency to aggregate. The size of the microparticles and the tendency to aggregate for the sample synthesized by the solid-phase method are greatest. The morphology of particles was studied using three methods: SEM, Scherrer and Williamson-Hall formulas and the following results were found: particle size depends on the synthesis method, but a relatively narrow size distribution within one synthesis method remains, the value of crystal lattice microdeformation for samples increases in a line: C sample– A sample– B sample. Thus, the work was carried out for determining the size, structure and morphology of superconducting phases. It expands knowledge in the field of research of superconducting compounds

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Section: Tablesupporting

confidence: 87%

DETERMINATION OF THE SIZES OF PARTICLES OF SUPERCONDUCTING CUPRATE Y3Ba5Cu8OX BY MEANS OF DIFFERENT METHODS

Bolotnikova¹

2020

Technology transfer: fundamental principles and innovative tech

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“…. 358), as well as oxygen parameters, average degree of copper oxidation and superconducting parameters [6].…”

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confidence: 99%

INVESTIGATION OF THE DEPENDENCE OF ORTHOROMBIC FACTORS ON EFFECTIVE IONIC RADIUS IN THE Ln3Ba5Cu8Ox SYSTEM (WHERE Ln– Y, Nd, Sm, Eu, Gd)

Bolotnikova

2020

Modalități Conceptuale De Dezvoltare a Științei Moderne- Volumen 2

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Four superconducting compounds are widely known in the Y-Ba-Cu-O system, namely: YBa2Cu3O7-δ (Y-123), YBa2Cu4O8-δ (Y-124), Y2Ba4Cu7O14+δ (Y-247) and Y3Ba5Cu8O18+δ (Y-358). They are characterized by a layered perovskite-like structure with different numbers of CuO2 planes and CuO chains [1, 2]. It has been experimentally confirmed that as the number of CuO2 planes for HTSCscuprate superconductors increases, the superconducting transition temperature increases [3, 4]. Thus, the various characteristics of superconducting materials, and especially the electrophysical and magnetic properties, are significantly influenced by their crystal structure, the parameters of the elementary lattice, the factor of orthorhombicity and the oxygen index. This work is devoted to the establishment of the parameters of elementary cells in the system: Ln3Ba5Cu8Ox (where Ln-Y, Nd, Sm, Eu, Gd), the calculation of the factor of orthorhombicity of the obtained phases and the establishment of dependences between these values. The samples were synthesized by the classical solid-phase method. The oxides of the corresponding metals (Y, Nd, Sm, Eu, Gd, Cu) and barium carbonate in the appropriate molar ratios were ground in an agate mortar to form a homogeneous mass. The resulting mixture was calcined in the temperature range 600-950°C in increments of 50°C for 40 hours, with intermediate grinding. The polycrystalline powder was then compressed into tablets at a pressure of 100 MPa and kept for about 10 hours at 900°C in air. The phase composition was investigated by X-ray powder diffraction on a Shimadzu LabX XRD-6000 diffractometer (CuKαradiation, λ = 1.54178 Ǻ, range of angles: 5≤2θ≤90°), at room temperature. The International Powder Diffraction Standards Database (JCPDS PDF-2) was used to identify the phases. The index of X-ray diffraction pattern, determination of a wide group of crystallographic parameters was performed using an additional program INDEX and X-Ray. The coefficient of orthorhombicity for the samples was performed according to the formula [5]: = (−) (+)

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Doping of Sm3Ba5Cu8O19 Compound with Praseodymium

Sandoghchi

Akhavan

2020

J Low Temp Phys

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Effect of Phase Composition of Superconductor Y3Ba5Cu8O18+δ on Its Conducting Characteristics

Cited by 4 publications

References 22 publications

DETERMINATION OF THE SIZES OF PARTICLES OF SUPERCONDUCTING CUPRATE Y3Ba5Cu8OX BY MEANS OF DIFFERENT METHODS

DETERMINATION OF THE SIZES OF PARTICLES OF SUPERCONDUCTING CUPRATE Y3Ba5Cu8OX BY MEANS OF DIFFERENT METHODS

INVESTIGATION OF THE DEPENDENCE OF ORTHOROMBIC FACTORS ON EFFECTIVE IONIC RADIUS IN THE Ln3Ba5Cu8Ox SYSTEM (WHERE Ln– Y, Nd, Sm, Eu, Gd)

Doping of Sm3Ba5Cu8O19 Compound with Praseodymium

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