Grain size distribution of the YBa_2Cu_3O_7-x high temperature superconducting compound

Scientific paper - Original scientific paper

• Author: Drago Kunstelj
• Author's institution: University of Zagreb; Faculty of Science; (Department of Physics)
• Scientific / art field, discipline and subdiscipline: NATURAL SCIENCES; Physics

Abstract (english)

The grain size distributions of three YBa_2Cu_3O_7-x ceramic samples, annealed at 960° C for different times (t=7, 70 and 700 hours, respectively), have been investigated. Both the average grain size (r) and that in the longest dimension of the grain (l) have been measured. The ratio l/r (reflecting the deviation from the spherical shape) initially increases with the annealing time (t) but tends to decrease at elevated t. An approximate t^1/2 increase of l probably reflects a plate-like shape of grains. For all samples the distributions of r and l are fitted best with the log-normal (Gauss) grain size distribution. The correlation between the grain size and critical current distributions is briefly discussed.

• Language: english
• Publication type: Scientific paper - Original scientific paper
• Publication status: Published
• Peer review: Peer review
• Publication version: Published version
• Journal title: Fizika A
• Numbering: vol. 3, no. 1, pp. 35-46
• p-ISSN: 1330-0008
• URN:NBN: urn:nbn:hr:217:446479
• Publication: 1994
• Document URL: http://fizika.hfd.hr/fizika_a/av94/a3p035.htm
• Type of resource: Text
• Access conditions: Open access
• Created on: 2019-10-03 07:25:35