Microstructural studies of K2CO3 and Rb 2CO3 doped YBCO HTSC

Research output: Contribution to journalConference article

1 Citation (Scopus)

Abstract

The influence of Me2CO3 (Me = K or Rb) additions on the microstructural morphology of YBa2Cu3Ox (YBCO) HTSC with nominal composition Y(1-0.2x)Ba (2-0.2x)MxCu3Oy (x = 0-2.0) were investigated by means of orientation imaging microscopy which provides a method for measuring a large number of individual grain orientations and relating them directly to the microstructural features by means of evaluating electron backscatter Kikuchi patterns in scanning electron microscopy. We investigated the influence of the alkali additions on the grain orientation distributions of YBCO. The samples are characterized by grain orientation maps, and pole and inverse pole figures. Finally, the grain orientation distribution functions are obtained from the measured data. Within a certain range of doping (up to 5 wt.% in the initial batch), the grain sizes are found to increase as compared to pure YBCO, accompanied by an improvement of the superconducting properties (Tc). It is shown that the additions of alkali carbonates do not introduce any preferred grain orientations in YBCO HTSC in the entire doping range.

Original languageEnglish
Pages (from-to)596-600
Number of pages5
JournalPhysica C: Superconductivity and its Applications
Volume392-396
Issue numberPART 1
DOIs
Publication statusPublished - 2003 Oct 1
Externally publishedYes
EventProceedings of the 15th International Symposium on Superconduc - Yokohama, Japan
Duration: 2002 Nov 112002 Nov 13

Fingerprint

Alkalies
high temperature superconductors
Poles
Doping (additives)
Carbonates
Distribution functions
Microscopic examination
Imaging techniques
Scanning electron microscopy
Electrons
alkalies
poles
Chemical analysis
potassium carbonate
carbonates
grain size
distribution functions
microscopy
scanning electron microscopy
electrons

Keywords

  • Automated mapping
  • Doping of high- T superconductors
  • EBSD
  • Electron backscatter diffraction

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Condensed Matter Physics
  • Energy Engineering and Power Technology
  • Electrical and Electronic Engineering

Cite this

Microstructural studies of K2CO3 and Rb 2CO3 doped YBCO HTSC. / Koblischka-Veneva, Anjela Dimitrova; Koblischka, Michael Rudolf.

In: Physica C: Superconductivity and its Applications, Vol. 392-396, No. PART 1, 01.10.2003, p. 596-600.

Research output: Contribution to journalConference article

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