Pellet-buffered film seed to grow single grain bulk YBCO

Chia Ming Yang, Chia Hao Liu, Bo Xiani Chen, Chin Wei Chang, In-Gann Chen

Research output: Contribution to journalArticle

Abstract

Epitaxial thin film seeds, exhibit a higher peritectic temperature than the bulk, have been recognized as a possible way to obtain large-sized single-grain REBCO bulks. Recently, use of a pellet as a buffer layer inserted between the film-seed and the main pellet has been reported. This approach can prevent Mg diffusion from the MgO substrate to the film seed, and enable the thin film to tolerate a higher maximum temperature in the TSMG (Top Seed Melt Growth) method. However, we found that the liquid phase decomposed from YBa2Cu3O7−x(YBCO) contacted the MgO substrate, due to surface tension, and caused undesirable grain nucleation. To resolve this problem, this study used a mini-pellet, smaller than the seed, as a buffer layer. This new technique can avoid the liquid phase contacting the MgO substrate, thereby allowing the YBCO single-grain bulk to be grown more easily. Moreover, the thin film seed can be re-used by removing the buffer layer after the crystal growing process.

Original languageEnglish
Pages (from-to)5038-5043
Number of pages6
JournalJournal of the American Ceramic Society
Volume100
Issue number11
DOIs
Publication statusPublished - 2017 Nov 1

Fingerprint

Seed
seed
Buffer layers
substrate
Thin films
Substrates
liquid
Epitaxial films
surface tension
Liquids
Crystal growth
nucleation
Surface tension
Nucleation
melt
crystal
Temperature
temperature

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Geology
  • Geochemistry and Petrology
  • Materials Chemistry

Cite this

Yang, Chia Ming ; Liu, Chia Hao ; Chen, Bo Xiani ; Chang, Chin Wei ; Chen, In-Gann. / Pellet-buffered film seed to grow single grain bulk YBCO. In: Journal of the American Ceramic Society. 2017 ; Vol. 100, No. 11. pp. 5038-5043.
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Pellet-buffered film seed to grow single grain bulk YBCO. / Yang, Chia Ming; Liu, Chia Hao; Chen, Bo Xiani; Chang, Chin Wei; Chen, In-Gann.

In: Journal of the American Ceramic Society, Vol. 100, No. 11, 01.11.2017, p. 5038-5043.

Research output: Contribution to journalArticle

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