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Characterisation of the sol-gel process in the superconducting NdBa2Cu3O7-y system

(2007) JOURNAL OF MATERIALS CHEMISTRY. 17(17). p.1714-1724
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Abstract
The objective of this paper is to obtain a better insight into the sol - gel mechanism of water-based precursors for the development of thin NdBa2Cu3O7-y (NBCO) superconducting films. The influence of metal complexation behaviour on the formation of transparent and homogenous gels after the combination of different metal salts and ligands has been studied for several metal salts (Cu2+, Nd3+ and Ba2+). Two inorganic aqueous sol - gel precursors have been studied: a metal nitrate - citric acid-based and a metal acetate - triethanolamine-based solution. The characteristics of the precursor solution are based on the determination of the stability constants by the computer program Superquad. The prediction of the complex stability in this solution was related to the complexation of the three metal ions (Cu2+, Nd3+ and Ba2+) with a certain ligand. IR-spectroscopy was used for the determination of the gel. This resulted in a better understanding of the composition of the solution and could be used for preparation of more stable sol - gel precursors for the synthesis of homogeneous end products. These sol - gel systems were used for the deposition of highly textured superconducting thin films on SrTiO3 substrates by dip-coating. Using detailed thermal analysis, it is shown that the morphology of the films can be optimised by adjusting the parameters during thermal treatment, resulting in dense and highly textured thin films. Special attention is given to the microstructure of the thin film because of its relevance to the superconducting transport properties of the coated conductor system.
Keywords
TRANSITION-METAL OXIDES, COMPLEXES

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MLA
Schoofs, Bart, David Van de Vyver, Pieter Vermeir, et al. “Characterisation of the Sol-gel Process in the Superconducting NdBa2Cu3O7-y System.” JOURNAL OF MATERIALS CHEMISTRY 17.17 (2007): 1714–1724. Print.
APA
Schoofs, B., Van de Vyver, D., Vermeir, P., Schaubroeck, J., Hoste, S., Herman, G., & Van Driessche, I. (2007). Characterisation of the sol-gel process in the superconducting NdBa2Cu3O7-y system. JOURNAL OF MATERIALS CHEMISTRY, 17(17), 1714–1724.
Chicago author-date
Schoofs, Bart, David Van de Vyver, Pieter Vermeir, Jo Schaubroeck, Serge Hoste, Gerrit Herman, and Isabel Van Driessche. 2007. “Characterisation of the Sol-gel Process in the Superconducting NdBa2Cu3O7-y System.” Journal of Materials Chemistry 17 (17): 1714–1724.
Chicago author-date (all authors)
Schoofs, Bart, David Van de Vyver, Pieter Vermeir, Jo Schaubroeck, Serge Hoste, Gerrit Herman, and Isabel Van Driessche. 2007. “Characterisation of the Sol-gel Process in the Superconducting NdBa2Cu3O7-y System.” Journal of Materials Chemistry 17 (17): 1714–1724.
Vancouver
1.
Schoofs B, Van de Vyver D, Vermeir P, Schaubroeck J, Hoste S, Herman G, et al. Characterisation of the sol-gel process in the superconducting NdBa2Cu3O7-y system. JOURNAL OF MATERIALS CHEMISTRY. 2007;17(17):1714–24.
IEEE
[1]
B. Schoofs et al., “Characterisation of the sol-gel process in the superconducting NdBa2Cu3O7-y system,” JOURNAL OF MATERIALS CHEMISTRY, vol. 17, no. 17, pp. 1714–1724, 2007.
@article{418547,
  abstract     = {The objective of this paper is to obtain a better insight into the sol - gel mechanism of water-based precursors for the development of thin NdBa2Cu3O7-y (NBCO) superconducting films. The influence of metal complexation behaviour on the formation of transparent and homogenous gels after the combination of different metal salts and ligands has been studied for several metal salts (Cu2+, Nd3+ and Ba2+). Two inorganic aqueous sol - gel precursors have been studied: a metal nitrate - citric acid-based and a metal acetate - triethanolamine-based solution. The characteristics of the precursor solution are based on the determination of the stability constants by the computer program Superquad. The prediction of the complex stability in this solution was related to the complexation of the three metal ions (Cu2+, Nd3+ and Ba2+) with a certain ligand. IR-spectroscopy was used for the determination of the gel. This resulted in a better understanding of the composition of the solution and could be used for preparation of more stable sol - gel precursors for the synthesis of homogeneous end products. These sol - gel systems were used for the deposition of highly textured superconducting thin films on SrTiO3 substrates by dip-coating. Using detailed thermal analysis, it is shown that the morphology of the films can be optimised by adjusting the parameters during thermal treatment, resulting in dense and highly textured thin films. Special attention is given to the microstructure of the thin film because of its relevance to the superconducting transport properties of the coated conductor system.},
  author       = {Schoofs, Bart and Van de Vyver, David and Vermeir, Pieter and Schaubroeck, Jo and Hoste, Serge and Herman, Gerrit and Van Driessche, Isabel},
  issn         = {0959-9428},
  journal      = {JOURNAL OF MATERIALS CHEMISTRY},
  keywords     = {TRANSITION-METAL OXIDES,COMPLEXES},
  language     = {eng},
  number       = {17},
  pages        = {1714--1724},
  title        = {Characterisation of the sol-gel process in the superconducting NdBa2Cu3O7-y system},
  url          = {http://dx.doi.org/10.1039/b614149h},
  volume       = {17},
  year         = {2007},
}

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