XRD spectra of new YBaCuO superconductors

Sujinnapram, Supphadate; Udomsamuthirun, P.; Kruaehong, Thitipong; Nilkamjon, Tunyanop; Ratreng, Sermsuk

doi:10.1007/s12034-011-0130-4

Cited by 23 publications

(5 citation statements)

References 8 publications

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“…The results of line fitting demonstrated that α = 3 shows a more appropriate fit to the curves. Also, the slight difference between α = 2 and 3 suggests that the system we studied is two-dimensional [ 15 , 16 ].…”

Section: Resultsmentioning

confidence: 99%

RETRACTED: Flux Dynamics in Y358 Superconductors

Heidari¹,

Vedad²,

Heidari³

et al. 2012

Materials

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Thermally activated flux motion and specific electric resistance in Y358 were studied under different magnetic fields ranging from 0 to 15 kOe. Through investigating the broadening of normal-superconducting transition, we found that the thermally-activated-flux-motion model can describe the electronic effect near the superconducting transition temperature. By modifying this model, specific electric resistance at different magnetic fields was calculated.

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Section: Resultsmentioning

confidence: 99%

RETRACTED: Flux Dynamics in Y358 Superconductors

Heidari¹,

Vedad²,

Heidari³

et al. 2012

Materials

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“…Figure 2 in the study by Udomsamuthirun, et al (2010) shows a linear relation between the number of Cu-atoms in their sample versus the c-axis value in the XRD spectra (Pimentel-Jr, et al, 2015). In our study, figure 4a shows the results found for our samples, which agree with those of Sujinnapram, et al (2011). Figures 4 (b,c) and 5 show a decreasing linear relationship of the orthorhombic unit cell parameter (a, b, V) in function of the rare earth ionic ratio RE 3 Ba 5 Cu 8 O 18 samples ;Tarascón, et al (1987) suggested this is due to the removal of oxygen atoms from the copper atoms.…”

Section: Resultssupporting

confidence: 89%

“…Figures 4 (b,c) and 5 show a decreasing linear relationship of the orthorhombic unit cell parameter (a, b, V) in function of the rare earth ionic ratio RE 3 Ba 5 Cu 8 O 18 samples ;Tarascón, et al (1987) suggested this is due to the removal of oxygen atoms from the copper atoms. From this perspective, the copper that was fourfold coordinated becomes twofold coordinated with an oxygen above and one below (Sujinnapram, et al, 2011). Figure 6 shows the ZFC and FC magnetization curves as a function of the temperature, which is typical of superconducting materials.…”

Section: Resultsmentioning

confidence: 99%

Análisis estructural del sistema superconductor RE3Ba5Cu8O18 (RE = Dy, Gd, Ho, Sm, Y, Yb)

Vargas

Canaría-Camargo

Roa-Rojas

et al. 2021

Rev. Acad. Colomb. Cienc. Ex. Fis. Nat.

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En este artículo reportamos la síntesis y caracterización estructural del sistema RE3Ba5Cu8O18 (RE = Dy, Gd, Ho, Sm, Y, Yb), lo que viene a complementar lo ya reportado por Aliabadi, et al., quienes lograron una temperatura crítica (TC) de ∼ 100 K para el sistema superconductor Y3Ba5Cu8O18, y evaluó la respuesta estructural en una muestra. El nuevo sistema RE3Ba5Cu8O18 se obtuvo utilizando el método de reacción de estado sólido seguido de un proceso térmico similar al empleado para el superconductor RE: 123. Asimismo, los resultados experimentales obtenidos mediante la técnica de difracción de rayos X y el análisis de Rietveld evidenciaron que estas muestras tenían la estructura cristalina esperada; sin embargo, fue obvio que la presencia de fases no superconductoras no afectó la temperatura de transición superconductora. Además, los estudios magnéticos revelaron que las muestras de RE3Ba5Cu8O18 registraban una transición superconductora en el rango de 80 a 93 K dependiendo de la tierra rara.

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“…The analysis results in its surface crystalline products, such as amorphous calcium phosphate (ACP) and octacalcium phosphate (OCP). The impurities introduced during the drying process can muddy the background, but have no effect on the main peak shapes (Sujinnapram et al, 2011).…”

Section: Characterization Analysismentioning

confidence: 99%

Study on the Recycling of P in Phosphogypsum Leachate

Zhao¹,

Zhang²,

Liu³

et al. 2023

GEP

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After washing and curing, P is transported from the phosphogypsum to the leachate during the phosphogypsum detoxification process, providing two ideas for phosphorus recovery from phosphogypsum leachate: 1) preparation of calcium hydrogen phosphate for feed; 2) preparation of calcium phosphate. A ready-to-use calcium oxide slurry was used to recover P from phosphogypsum leachate at a slurry concentration of 20% and a quantitative link between calcium to phosphorus ratio and fixation rate was fitted by mixed use batch experiments, reaction kinetics and thermodynamics, and theoretical calculations were used to demonstrate that phosphorus cannot be completely reused in the preparation of calcium hydrogen phosphate. The findings demonstrated that: a) the residual phosphorus concentration was in the range of 1300 -1500 mg/L for the preparation of type I feed grade calcium hydrogen phosphate from phosphogypsum leachate; b) the P removal effect could reach 99.99% for the preparation of calcium phosphate from phosphogypsum using the theoretical equation: fixation rate = 87.91 − 10.96(Ca/P) + 3.22(Ca/P) 2 (R 2 = 0.9954); c) The procedure follows the suggested secondary kinetics, and according to the Freundlich isothermal model, the reaction process is under the control of the chemical reaction, with a reaction index of 0.7605. This study can be used as a theoretical guide for the recovery of P from phosphogypsum leachate, the preparation of products to bring about economic by-products, and the purification of wastewater for reuse.

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XRD spectra of new YBaCuO superconductors

Cited by 23 publications

References 8 publications

RETRACTED: Flux Dynamics in Y358 Superconductors

RETRACTED: Flux Dynamics in Y358 Superconductors

Análisis estructural del sistema superconductor RE3Ba5Cu8O18 (RE = Dy, Gd, Ho, Sm, Y, Yb)

Study on the Recycling of P in Phosphogypsum Leachate

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