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Supercritical antisolvent precipitation: A new technique for preparing submicronic yttrium powders to improve YBCO superconductors

Published online by Cambridge University Press:  31 January 2011

E. Reverchon ,
C. Celano ,
G. Della Porta ,
A. Di Trolio  and
S. Pace
E. Reverchon
Affiliation:
Dipartimento di Ingegneria Chimica e Alimentare, Universitài Salerno, Via Ponte Don Melillo, 84084 Fisciano (SA), Italy
C. Celano
Affiliation:
Dipartimento di Ingegneria Chimica e Alimentare, Universitài Salerno, Via Ponte Don Melillo, 84084 Fisciano (SA), Italy
G. Della Porta
Affiliation:
Dipartimento di Ingegneria Chimica e Alimentare, Universitài Salerno, Via Ponte Don Melillo, 84084 Fisciano (SA), Italy
A. Di Trolio
Affiliation:
INFM e Dipartimento di Fisica, Università di Salerno, Via S. Allende, 84081 Baronissi (SA), Italy
S. Pace
Affiliation:
INFM e Dipartimento di Fisica, Università di Salerno, Via S. Allende, 84081 Baronissi (SA), Italy
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Extract

The solvent, supercritical antisolvent technique (SAS) has been used to produce submicronic particles of yttrium acetate for the synthesis of YBCO superconductors. For this purpose, in a continuous SAS apparatus dimethylsulfoxide (DMSO) as yttrium acetate solvent and supercritical carbon dioxide as antisolvent have been adopted. Experiments have been performed in the pressure range between 70 and 160 bar and for temperatures between 40 and 70 °C. Different concentrations of yttrium acetate in DMSO have also been tested. Various morphologies of yttrium acetate particles have been obtained, having mean particle diameters from 0.1 to 7 μm. At 40 °C and pressures larger than 120 bar, submicronic spherical particles of yttrium acetate of about 0.1 μm diameter and with a narrow particle size distribution have been achieved.

Type
Articles
Information
Journal of Materials Research , Volume 13 , Issue 2 , February 1998 , pp. 284 - 289
Copyright
Copyright © Materials Research Society 1998

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References

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