The properties of YBa2Cu3O7 superconductors sintered from the powder mixture of Y2O3, BaO2, and Cu2O

Kao, Ming-Yuan; McKinney, Bryan L.

doi:10.1016/0167-577x(91)90092-k

Cited by 4 publications

(7 citation statements)

References 19 publications

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“…At times, BaO 2 instead of BaCO 3 was used [27][28][29][30][31][32], so as to avoid the back reaction of BaO with CO 2 (which evolved during decomposition of BaCO 3 ). A sample synthesized from BaO 2 containing precursors showed superconducting behaviour without oxygenation [30,31].…”

Section: Selection Of Starting Precursorsmentioning

confidence: 99%

A review on the synthesis of Y–Ba–Cu-oxide powder

Pathak¹,

Mishra²

2005

Supercond. Sci. Technol.

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The preparation of Y–Ba–Cu-oxide (YBCO) powder by various techniques is critically reviewed and the synthesis of ultrafine superconducting YBa2Cu3Ox(123) powders is specially emphasized. The fine powder has assumed a large importance, requiring the minimization of processing parameters (time and temperature) during calcination, homogenization and sintering to avoid the problems of evaporation of the constituent oxides. From the voluminous research activities on YBCO it is known that by adopting any preparation technique the superconducting transition temperature (Tc) value of ≈92 K could be achieved in the bulk samples, thus in this review the Tc values are not emphasized. Also, the other transport properties such as critical current densities (Jc) and magnetic properties are not discussed, since these properties are mainly controlled by many other parameters related to the weak link across the grain boundaries of the specimens, and a very little role is played by the synthetic procedure. The weak links across the grain boundaries are known to be the cause for the poor Jc values in bulk specimens and those weak links are observed due to the presence of impurities at the grain boundaries, misorientation of grains and oxygenation of the samples. By selecting the proper synthetic procedure, only the impurity problem can be solved, and to remove the other problems, a proper fabrication method needs to be adopted. This review will guide the new researcher to find the appropriate technique to synthesize good quality YBCO powder.

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Section: Selection Of Starting Precursorsmentioning

confidence: 99%

A review on the synthesis of Y–Ba–Cu-oxide powder

Pathak¹,

Mishra²

2005

Supercond. Sci. Technol.

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“…In agreement with these reports, peroxide-driven routes from PIRO (Figure b and Table ) dominate the Pareto-optimal regions, predicted to outperform the common precursor routes above. In particular, the BaO 2 –Cu 2 O–Y 2 O 3 route (R4), which was reported to be highly favorable for producing phase-pure YBCO with no carbonate impurities, , is predicted to be one of the most favorable routes in Figure b. The method overall remains predictive even when a reaction’s in situ pathway may potentially involve intermediate steps, which can be explained by the explicit localized consideration of each possible reaction front between the reactants and target for catalytic nucleation, isolated from any other concurrent precipitations.…”

Section: Resultsmentioning

confidence: 99%

“…and therefore many alternative routes have been pursued for the solid-state synthesis of YBCO. 69,70 Among these, peroxide (BaO 2 )-driven combustion routes with different Cu sources, such as metallic Cu, 71 Cu 2 O, 72,73 and CuO, 70,74−76 have received notable attention, as they enable shorter, often single-step synthesis. In agreement with these reports, peroxide-driven routes from PIRO (Figure 4b and Table 3) dominate the Pareto-optimal regions, predicted to outperform the common precursor routes above.…”

Section: ■ Results and Discussionmentioning

confidence: 99%

“…4(b) and Table 3) dominate the Paretooptimal regions, predicted to outperform the common precursor routes above. In particular, the BaO 2 -Cu 2 O-Y 2 O 3 route (R4), which was reported to be highly favorable for producing phase-pure YBCO with no carbonate impurities, 72,73 is predicted as one of the most-favorable routes in Fig. 4(b).…”

Section: Majority Of These Reactions Are Likely To Be Impractical Simply Based On What Is Available Tomentioning

confidence: 99%

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Rational Solid-State Synthesis Routes for Inorganic Materials

2021

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Rational solid-state synthesis of inorganic compounds is formulated as catalytic nucleation on crystalline reactants, where contributions of reaction and interfacial energies to the nucleation barriers are approximated from high-throughput thermochemical data, and structural and interfacial features of crystals, respectively.Favorable synthesis reactions are then identified by a Pareto analysis of relative nucleation barriers and phase-selectivities of reactions leading to the target. We demonstrate the application of this approach in reaction planning for solid-state synthesis of a range of compounds, including the widely-studied oxides LiCoO 2 , BaTiO 3 and YBa 2 Cu 3 O 7 , as well as other metal oxide, oxyfluoride, phosphate and nitride targets. Pathways for enabling retrosynthesis of inorganics are also discussed. File list (2) download file view on ChemRxiv SynthesisPlanning_Manuscript_v2.pdf (4.71 MiB) download file view on ChemRxiv SynthesisPlanning_Manuscript_SI_v2.pdf (3.39 MiB)

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“…In agreement with these reports, peroxide-driven routes from PIRO (Fig.4(b) and Table 3) dominate the Pareto-optimal regions, predicted to outperform the common precursor routes above. In particular, the BaO 2 -Cu 2 O-Y 2 O 3 route (R4), which was reported to be highly favorable for producing phase-pure YBCO with no carbonate impurities, 70,71 is predicted as one of the most-favorable routes in Fig. 4(b).…”

Section: Resultsmentioning

confidence: 99%

Rational Solid-State Synthesis Routes for Inorganic Materials

Aykol¹,

Montoya²,

Hummelshøj³

2021

Preprint

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Rational solid-state synthesis of inorganic compounds is formulated as catalytic nucleation on crystalline reactants, where contributions of reaction and interfacial energies to the nucleation barriers are approximated from high-throughput thermochemical data, and structural and interfacial features of crystals, respectively. Favorable synthesis reactions are then identified by a Pareto analysis of relative nucleation barriers and phase-selectivities of reactions leading to the target. We demonstrate the application of this approach in reaction planning for solid-state synthesis of a range of compounds, including the widely-studied oxides LiCoO2, BaTiO3 and YBa2Cu3O7, as well as other metal oxide, oxyfluoride, phosphate and nitride targets. Pathways for enabling retrosynthesis of inorganics are also discussed.

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The properties of YBa2Cu3O7 superconductors sintered from the powder mixture of Y2O3, BaO2, and Cu2O

Cited by 4 publications

References 19 publications

A review on the synthesis of Y–Ba–Cu-oxide powder

A review on the synthesis of Y–Ba–Cu-oxide powder

Rational Solid-State Synthesis Routes for Inorganic Materials

Rational Solid-State Synthesis Routes for Inorganic Materials

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