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Explosive compaction and synthesis of MgB2 superconductor using the powder in tube technique

A. G. MAMALIS1,* , E. HRISTOFOROU1, D. E. MANOLAKOS1, P. SVEC2, T. PRIKHNA3, J. D. THEODORAKOPOULOS1, G. KOUZILOS1

Affiliation

  1. National Technical University of Athens, Iroon Polytechniou 9, Athens 15780, Greece
  2. Slovak Academy of Sciences, Bratislava, Slovakia
  3. Bakul Institute for Superhard Materials, National Academy of Ukraine, Kiev, Ukraine

Abstract

MgB2 samples were prepared from Mg and B powders / flakes using the powder in tube method and consequent sintering in Argon atmosphere at 960 o C. Compaction of the Mg flakes and B powder resulted in a two phase alloy, with almost zero porosity and high hardness. XDR patterns illustrated that when Mg flakes and B powder were used as the precursor materials, formation of MgB2 was not possible except for the border interface of Mg and B. Diffusion was not completed due to the low specific area. Contrary to that, the use of Mg and B fine powders lead to well packed superconductive MgB2 samples..

Keywords

Powder in tube technique, MgB2 synthesis, XRD patterns, SEM micrographs.

Submitted at: March 13, 2008
Accepted at: May 14, 2008

Citation

A. G. MAMALIS, E. HRISTOFOROU, D. E. MANOLAKOS, P. SVEC, T. PRIKHNA, J. D. THEODORAKOPOULOS, G. KOUZILOS, Explosive compaction and synthesis of MgB2 superconductor using the powder in tube technique, Journal of Optoelectronics and Advanced Materials Vol. 10, Iss. 5, pp. 1000-1004 (2008)