Properties of YBa2Cu3O7−δ-Ag superconductors prepared by the citrate method

Fonseca, Fábio C.; Muccillo, R.

doi:10.1016/0921-4534(96)00368-1

Cited by 16 publications

(8 citation statements)

References 15 publications

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“…The La 0.65 Sr 0.30 MnO 3 (LSM) cathode was synthesized by the polymeric precursor technique [20]. Starting materials were La(NO 3 ) 2 .6(H 2 O) (Aldrich, 99,99%), Sr(NO 3 ) 3 .4(H 2 O) (Aldrich, 99%), Mn(CH 3 CO 3 ) 2 .4(H 2 O) (Aldrich, 99%).…”

Section: Methodsmentioning

confidence: 99%

Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells

et al. 2017

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Electrodes for electrolyte-supported solid oxide fuel cells (SOFC's) were fabricated by spin coating. Strontium-doped lanthanum manganite (LSM) cathode and nickel yttria-stabilized zirconia cermet anodes were synthesized and processed for enhanced deposition conditions. The influence of electrode microstructural parameters was investigated by a systematic experimental procedure aiming at optimized electrochemical performance of single cells. Polarization curves showed a strong dependence on both electrode thickness and sintering temperature. By a systematic control of such parameters, the performance of single cells was significantly enhanced due to decreasing of polarization resistance from 26 Ω cm² to 0.6 Ω cm² at 800°C. The results showed that spin-coated electrodes can be optimized for fast and cost effective fabrication of SOFCs.

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Section: Methodsmentioning

confidence: 99%

Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells

et al. 2017

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“…The inclusion of silver in the Y123 sponges was also investigated. Silver is ubiquitous in YBCO research as a means to improve mechanical strength and grain connectivity, usually leading to an increase in J c . , Silver inclusions are typically introduced through a diffusion-doping approach, which results in islands of silver around 10 μm in diameter. In this work, we introduced silver into the synthesis mixture by the simple addition of approximately 10 wt % of silver nitrate (as compared to total nitrates present).…”

mentioning

confidence: 99%

Use of the Polysaccharide Dextran as a Morphological Directing Agent in the Synthesis of High-T_c Superconducting YBa₂Cu₃O₇_-_δ Sponges with Improved Critical Current Densities

2007

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“…On the other hand, Ag does not degrade the T c when substituted or added in the 123 structure 4. The effect of Ag doping has been widely investigated for Y‐123 system 6–13. These studies have shown that Ag addition lowers the phase formation temperature, increases the bulk density, improves the microstructure and mechanical properties, changes critical current density, and influences crystallization at the grain boundaries.…”

Section: Introductionmentioning

confidence: 99%

Superconducting and microstructural properties of Mg_1−xAg_xB₂

Singh

Mohan

Kumar

et al. 2010

Physica Status Solidi (a)

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A systematic study on the effect of silver (Ag) doping in magnesium diboride (MgB 2 ) superconductor has been undertaken. A series of polycrystalline samples with composition Mg 1Àx Ag x B 2 (0 x 0.20) were synthesized by using the ''in situ'' solid state reaction method. All the samples were sintered at 850 8C for 2 h under the high purity argon flow. The room temperature X-ray diffraction (XRD), low temperature resistivity (r-T) measurements and field emission scanning electron microscopy (FE-SEM) were performed to explore the phase purity, superconducting transition temperature, and microstructural properties, respectively.The XRD patterns show that Ag doping leads to the formation of Mg-Ag phase. The relative intensity of Mg-Ag phase increases with increasing Ag content. The r-T measurement shows that superconducting transition temperature (T c ) decreases slightly with Ag doping. All the samples have T c between 38.5 K (x ¼ 0.00) and 37 K (x ¼ 0.20). The FE-SEM images have revealed hexagonal shaped grains with an average grain size between 0.20 and 0.50 mm.

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Properties of YBa2Cu3O7−δ-Ag superconductors prepared by the citrate method

Cited by 16 publications

References 15 publications

Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells

Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells

Use of the Polysaccharide Dextran as a Morphological Directing Agent in the Synthesis of High-T_c Superconducting YBa₂Cu₃O₇_-_δ Sponges with Improved Critical Current Densities

Superconducting and microstructural properties of Mg_1−xAg_xB₂

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Properties of YBa2Cu3O7−δ-Ag superconductors prepared by the citrate method

Cited by 16 publications

References 15 publications

Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells

Optimization of spin-coated electrodes for electrolyte-supported solid oxide fuel cells

Use of the Polysaccharide Dextran as a Morphological Directing Agent in the Synthesis of High-Tc Superconducting YBa2Cu3O7-δ Sponges with Improved Critical Current Densities

Superconducting and microstructural properties of Mg1−xAgxB2

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Use of the Polysaccharide Dextran as a Morphological Directing Agent in the Synthesis of High-T_c Superconducting YBa₂Cu₃O₇_-_δ Sponges with Improved Critical Current Densities

Superconducting and microstructural properties of Mg_1−xAg_xB₂