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Deposition of CeO2 buffer layers and YBa2Cu3O7-sigma superconducting layers using an aqueous sol-gel method

(2004) EURO CERAMICS VIII, PTS 1-3. 264-268. p.501-504
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Abstract
Recently, the sol-gel method has been developed as a potential alternative to the conventional vacuum techniques (e.g. pulsed laser deposition and magnetron sputtering) towards the synthesis of a coated conductor. The advantages of the sol-gel method include a more simple and faster way to deposit films, deposition at a lower cost and the possibility to incorporate it in a continuous system. Possible applications of these coated conductors are long lengths of superconducting cables, strong magnets, fault current limiters,... In Our work, the coated conductor consists of a CeO2 buffer layers and a YBa2Cu3O7-delta superconducting film, coated on a textured substrate. Two kinds of substrates have been used in this work: ceramic R-cut (1102) sapphire substrate and metallic (001) Ni-alloy tape. For both Substrates, a cleaning procedure was developed to improve the wettability. An almost complete wettability is necessary as an aqueous sol-gel method is used in this work. Dip-coating the cleaned substrates in the aqueous metal-citrate solution leaves a wet film on the substrate which can be converted to the ceramic oxide by thermal treatment. The dip-coating technique and thermal treatment were first optimized onto the sapphire substrate, as in the case of Ni-alloy, special attention is needed to avoid oxidation of the substrate. Due to the larger lattice mismatch, no biaxially textured CeO2 could be obtained on R-cut sapphire substrate. However, on Ni-alloy tape, perfectly (001)-oriented CeO2 is formed when the thermal treatment is performed in an Ar-H-2 atmosphere to avoid oxidation of the substrate. The results of microscopic and structural study of both CeO2 and YBa2Cu3O7-delta will be presented. Special attention will be given to the XRD and pole figure results, as these results give a good indication of the texture of the layers. Texture is of huge importance in the case of coated conductors, as in this way high critical current densities might be obtained.

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Chicago
Penneman, Greet, Isabel Van Driessche, Els Bruneel, and Serge Hoste. 2004. “Deposition of CeO2 Buffer Layers and YBa2Cu3O7-sigma Superconducting Layers Using an Aqueous Sol-gel Method.” EURO CERAMICS VIII, PTS 1-3 264-268: 501–504.
APA
Penneman, G., Van Driessche, I., Bruneel, E., & Hoste, S. (2004). Deposition of CeO2 buffer layers and YBa2Cu3O7-sigma superconducting layers using an aqueous sol-gel method. EURO CERAMICS VIII, PTS 1-3, 264-268, 501–504.
Vancouver
1.
Penneman G, Van Driessche I, Bruneel E, Hoste S. Deposition of CeO2 buffer layers and YBa2Cu3O7-sigma superconducting layers using an aqueous sol-gel method. EURO CERAMICS VIII, PTS 1-3. TRANS TECH PUBLICATIONS LTD; 2004;264-268:501–4.
MLA
Penneman, Greet, Isabel Van Driessche, Els Bruneel, et al. “Deposition of CeO2 Buffer Layers and YBa2Cu3O7-sigma Superconducting Layers Using an Aqueous Sol-gel Method.” EURO CERAMICS VIII, PTS 1-3 264-268 (2004): 501–504. Print.
@article{349040,
  abstract     = {Recently, the sol-gel method has been developed as a potential alternative to the conventional vacuum techniques (e.g. pulsed laser deposition and magnetron sputtering) towards the synthesis of a coated conductor. The advantages of the sol-gel method include a more simple and faster way to deposit films, deposition at a lower cost and the possibility to incorporate it in a continuous system. Possible applications of these coated conductors are long lengths of superconducting cables, strong magnets, fault current limiters,...
In Our work, the coated conductor consists of a CeO2 buffer layers and a YBa2Cu3O7-delta superconducting film, coated on a textured substrate. Two kinds of substrates have been used in this work: ceramic R-cut (1102) sapphire substrate and metallic (001) Ni-alloy tape. For both Substrates, a cleaning procedure was developed to improve the wettability. An almost complete wettability is necessary as an aqueous sol-gel method is used in this work. Dip-coating the cleaned substrates in the aqueous metal-citrate solution leaves a wet film on the substrate which can be converted to the ceramic oxide by thermal treatment. The dip-coating technique and thermal treatment were first optimized onto the sapphire substrate, as in the case of Ni-alloy, special attention is needed to avoid oxidation of the substrate. Due to the larger lattice mismatch, no biaxially textured CeO2 could be obtained on R-cut sapphire substrate. However, on Ni-alloy tape, perfectly (001)-oriented CeO2 is formed when the thermal treatment is performed in an Ar-H-2 atmosphere to avoid oxidation of the substrate.

The results of microscopic and structural study of both CeO2 and YBa2Cu3O7-delta will be presented. Special attention will be given to the XRD and pole figure results, as these results give a good indication of the texture of the layers. Texture is of huge importance in the case of coated conductors, as in this way high critical current densities might be obtained.},
  author       = {Penneman, Greet and Van Driessche, Isabel and Bruneel, Els and Hoste, Serge},
  issn         = {1013-9826},
  journal      = {EURO CERAMICS VIII, PTS 1-3},
  language     = {eng},
  pages        = {501--504},
  publisher    = {TRANS TECH PUBLICATIONS LTD},
  title        = {Deposition of CeO2 buffer layers and YBa2Cu3O7-sigma superconducting layers using an aqueous sol-gel method},
  volume       = {264-268},
  year         = {2004},
}

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