Water determination of precursor solutions with oxidant cations by the Karl Fischer method: the YBCO-TFA case

Calleja, A.; Ricart, Susagna; Palmer, Xavier; Luccas, R. F.; Puig, T.; Obradors, X.

doi:10.1007/s10971-009-2100-5

Cited by 13 publications

(12 citation statements)

References 18 publications

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“…Solution 6 was also prepared with just a 10% of fluorine as specified later. The systematic analysis of these solutions were carried out by measuring the viscosity with a Haake RheoStress 600 rheometer (ordinary interval around 12-16 mPa·s at 22ºC), the contact angle with a DSA 100 analyzer (ordinary interval around 30º-35º on LAO substrates), the metal stoichiometry was checked by a volumetric assay and this was balanced to the 1:2:3 stoichiometry if necessary by the addition of metalsalts, and the water content in the solutions was measured by the Karl-Fischer method [15]. The thermogravimetric (TG) analysis was done with the TGA/DSC1 apparatus and the masses at room temperature where measured with the XS3DU balance, both from Mettler Toledo.…”

Section: Preparation Of Precursor Solutionsmentioning

confidence: 99%

Solution design for low-fluorine trifluoroacetate route to YBa₂Cu₃O₇films

Palmer

Pop

Eloussifi

et al. 2015

Supercond. Sci. Technol.

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In the context of CSD-MOD growth of coated conductors for low cost and scalable production of YBCO coated conductors, new solutions are proposed in accordance with the new requirements concerning environmental safety and product performance. Looking at these objectives we will present here our work in the preparation of metallorganic precursor solutions with reduced fluorine content, which fulfill the requirements of superconducting YBCO epitaxial layers, leading to high superconducting performance. Solutions with low fluorine precursors with different solvents and amounts of additives have been stabilized and their rheology modified for substrate wettability. Thermal decomposition analysis and infrared spectroscopy performed directly in films, have revealed the different decomposition steps and NMR analysis could unveil the chemical reactions taking place in the solution. Upon optimization of the growth process parameters, T c and J c (77K) of 90 K and 3-4 MA/cm 2 are obtained.

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Section: Preparation Of Precursor Solutionsmentioning

confidence: 99%

Solution design for low-fluorine trifluoroacetate route to YBa₂Cu₃O₇films

Palmer

Pop

Eloussifi

et al. 2015

Supercond. Sci. Technol.

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“…The choice of the solvent was based on previous studies performed on YBCO samples grown with TFA solutions [8]. It is important to note, however, that having an alcohol and a carboxylic acid in the reaction mixture favors the formation of water by means of an esterification reaction, which may have a detrimental effect on its superconducting performance [26]. Therefore, the solvents were smoothly evaporated until constant weight (approximately 2.5 h) in a vacuum rotary evaporator at 131 mbar and with a bath temperature of 70 • C to ensure a water content less than 0.6%.…”

Section: Methodsmentioning

confidence: 99%

Low-Fluorine Ba-Deficient Solutions for High-Performance Superconducting YBCO Films

et al. 2021

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High-performing superconducting YBa2Cu3O7–x (YBCO) films are fabricated by a chemical solution deposition methodology through novel barium-deficient low-fluorine solutions. The precursor solutions, distinguished for being straightforward, inexpensive and eco-friendly, allow us to reduce the growing temperature of YBCO down to 750 °C. We investigated the influence of the growing temperatures on both the microstructure and superconducting properties of YBCO films by using conventional thermal annealing and flash-heating approaches. A clear correlation between the growing temperature (Tg) and the superconducting performance of the films was obtained with improved performances observed at low Tg.

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“…Metal stoichiometry of solutions determined by ICP analysis was (Y:Ba:Cu) 1: 2 0.05: 3 0.05. Also water content in the solutions was measured by the Karl-Fischer method [33] and was found to be below 1%wt for TFA solutions and below 2%wt for LF solutions.…”

Section: Methodsmentioning

confidence: 99%

Application of thermal analysis and kinetic predictions to YBCO films prepared by chemical solution deposition methods

Rasi

Roura‐Grabulosa

Farjas

2020

J Therm Anal Calorim

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Fluorine-based chemical solution deposition routes to prepare YBa 2 Cu 3 O 7-∂ films were characterized with the aid of thermal analysis techniques. Thermogravimetric analysis and X-ray diffraction were applied to characterize the main steps of the fluorine-based route: pyrolysis of the organic material and growth of the oxide. The difference between the thermal behaviour of films and powders in fluorine-based chemical solution deposition route is reiterated to justify the importance of the study of films. Finally, the kinetic analysis is used to predict the mass evolution of the pyrolysis for an arbitrary temperature program with the aim to optimize this treatment to minimize film porosity and crack formation.

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Water determination of precursor solutions with oxidant cations by the Karl Fischer method: the YBCO-TFA case

Cited by 13 publications

References 18 publications

Solution design for low-fluorine trifluoroacetate route to YBa₂Cu₃O₇films

Solution design for low-fluorine trifluoroacetate route to YBa₂Cu₃O₇films

Low-Fluorine Ba-Deficient Solutions for High-Performance Superconducting YBCO Films

Application of thermal analysis and kinetic predictions to YBCO films prepared by chemical solution deposition methods

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Water determination of precursor solutions with oxidant cations by the Karl Fischer method: the YBCO-TFA case

Cited by 13 publications

References 18 publications

Solution design for low-fluorine trifluoroacetate route to YBa2Cu3O7films

Solution design for low-fluorine trifluoroacetate route to YBa2Cu3O7films

Low-Fluorine Ba-Deficient Solutions for High-Performance Superconducting YBCO Films

Application of thermal analysis and kinetic predictions to YBCO films prepared by chemical solution deposition methods

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Product

Resources

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Solution design for low-fluorine trifluoroacetate route to YBa₂Cu₃O₇films

Solution design for low-fluorine trifluoroacetate route to YBa₂Cu₃O₇films