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

Kunstelj, Drago (1994) Grain size distribution of the YBa_2Cu_3O_7-x high temperature superconducting compound. Fizika A, 3 (1). pp. 35-46. ISSN 1330-0008

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Abstract

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.

Item Type: Article
Date: 1994
Subjects: NATURAL SCIENCES > Physics
Divisions: Faculty of Science > Department of Physics
Publisher: Hrvatsko fizikalno društvo
Depositing User: Gordana Stubičan Ladešić
Date Deposited: 21 Mar 2014 13:01
Last Modified: 21 Mar 2014 13:01
URI: http://digre.pmf.unizg.hr/id/eprint/681

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