PROPERTIES OF NANOPHASE GRAINS OF SUPERCONDUCTING YBCO PREPARED BY WET-TYPE JET MILL

Authors
KEZUKA H XI ZH MIYANAGA Y KANNARI C
Citation
H. Kezuka et al., PROPERTIES OF NANOPHASE GRAINS OF SUPERCONDUCTING YBCO PREPARED BY WET-TYPE JET MILL, Thin solid films, 282(1-2), 1996, pp. 584-587
Citations number
5
Categorie Soggetti
Physics, Applied","Material Science","Physics, Condensed Matter
Journal title
Thin solid films → ACNP
ISSN journal
00406090
Volume
282
Issue
1-2
Year of publication
1996
Pages
584 - 587
Database
ISI
SICI code
0040-6090(1996)282:1-2<584:PONGOS>2.0.ZU;2-S
Abstract
Superconducting ultrafine particles of YBCO were prepared by a wet-typ e jet mill in a high pressure how of methyl-ethyl-ketone (CH3COCH2CH3) . As a result, when the mill is operated at a pressure of 1300 kg cm(- 2) ultrafine particles of YBCO show oriented polycrystal structures wi th a particle size 80-120 Angstrom in diameter and with the Lattice pa rameter of 3.9 Angstrom in the [001] orientation from transmission ele ctron microscopy studies. The particles show the T-c to be at 93 K (on set) after annealing at 935-950 degrees C for 12 h in oxygen.