Structure and superconducting parameters of composites YBaCuO-Ag prepared by static, dynamic and hot pressing

Author

Dotsenko, V.I. ; Braude, I.S. ; Ivanchenko, L.G. ; Kislyak, I.F. ; Puzanova, A.D.

Author_Institution

B. Verkin Inst. for Low Temp. Phys. & Eng., Nat. Acad. of Sci. of Ukraine, Kharkov, Ukraine

Volume

5

Issue

2

fYear

1995

fDate

6/1/1995 12:00:00 AM

Firstpage

1456

Lastpage

1458

Abstract

To investigate effect of a technological scheme on the structure and superconducting parameters of powder composites YBaCuO-Ag, three types of pressing of powder mixtures were used, i.e. static, hot, and dynamic pressing. Silver content changed in the range c=0-50 vol.%. Orthorhombicity degree, b/a, of the YBaCuO-ceramics proved to be practically independent on c up to c=30 vol.% for static and hot pressing, and it decreased appreciably even at small c values in the case of dynamically pressed samples. Critical temperature T/sub c/ and transport critical current density j/sub c/ show similar behaviour with maximum about c=10 vol.% for static and hot pressing. Dynamic pressing results in significant deterioration of these parameters.<>

Keywords

barium compounds; composite superconductors; critical current density (superconductivity); high-temperature superconductors; hot pressing; lattice constants; materials preparation; powders; silver; stoichiometry; superconducting transition temperature; yttrium compounds; Ag content; YBa/sub 2/Cu/sub 3/O/sub 7/-Ag; YBa/sub 2/Cu/sub 3/O/sub x/-Ag; critical current density; critical temperature; dynamic pressing; hot pressing; orthorhombicity degree; powder composites; static pressing; structure; Ceramics; Current measurement; Density measurement; Electric variables measurement; Electrical resistance measurement; Grain size; Powders; Pressing; Silver; Temperature;

fLanguage

English

Journal_Title

Applied Superconductivity, IEEE Transactions on

Publisher

ieee

ISSN

1051-8223

Type

jour

DOI

10.1109/77.402840

Filename

402840