A low-cost batch process for high-performance melt-textured GdBaCuO pellets

Muralidhar Miryala, M. Tomita, K. Suzuki, M. Jirsa, Y. Fukumoto, A. Ishihara

Research output: Contribution to journalArticle

44 Citations (Scopus)

Abstract

High-Tc superconducting magnets promise a variety of industrial, medical, public, and research applications. However, the potential large-scale applications of these materials need excellent and uniform properties and a cheap production method. The batch process developed for the fabrication of GdBa2Cu3Oy pellets in air fulfils all of these requirements. The samples were melt-processed using a cold seeding method with thin film Nd-123 seeds grown on MgO crystals. We used self-made Gd-123 and Gd-211 powders mixed with 0.1wt% of Pt. Up to 1-1.5kg of melt-grown Gd-123 bulks could be prepared in one run. XRD analysis confirmed that all of the bulks were c-axis oriented. The superconducting and magnetic performance of the pellets was checked on several small test samples cut out at various standard positions within the bulk. The values were reasonably uniform and the performance was similar to the oxygen-controlled melt-grown Gd-123 samples. The average trapped field at 77K in the 24mm diameter batch samples was between 0.8 and 0.9T, close to the maximum value of 1T reported so far for Gd-123 single grains processed in air. The present results prove that a high-performance good-quality LREBa 2Cu3Oy material can be scaled up from laboratory to industrial production.

Original languageEnglish
Article number045033
JournalSuperconductor Science and Technology
Volume23
Issue number4
DOIs
Publication statusPublished - 2010
Externally publishedYes

Fingerprint

pellets
Superconducting magnets
Air
Powders
Seed
Costs
Oxygen
production engineering
Fabrication
Thin films
Crystals
air
superconducting magnets
inoculation
seeds
requirements
fabrication
oxygen
thin films
crystals

ASJC Scopus subject areas

  • Electrical and Electronic Engineering
  • Condensed Matter Physics
  • Ceramics and Composites
  • Materials Chemistry
  • Metals and Alloys

Cite this

A low-cost batch process for high-performance melt-textured GdBaCuO pellets. / Miryala, Muralidhar; Tomita, M.; Suzuki, K.; Jirsa, M.; Fukumoto, Y.; Ishihara, A.

In: Superconductor Science and Technology, Vol. 23, No. 4, 045033, 2010.

Research output: Contribution to journalArticle

Miryala, Muralidhar ; Tomita, M. ; Suzuki, K. ; Jirsa, M. ; Fukumoto, Y. ; Ishihara, A. / A low-cost batch process for high-performance melt-textured GdBaCuO pellets. In: Superconductor Science and Technology. 2010 ; Vol. 23, No. 4.
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