Polymerized Complex Synthesis of Superconductors and Their Properties

Masato Kakihana, Masatomo Yashima, Masahiro Yoshimura, Hiromasa Mazaki, Hiroshi Yasuoka

Research output: Contribution to journalArticlepeer-review

6 Citations (Scopus)


A novel “polymerized complex” technique to produce highly pure copper based high-Tc superconductors has been developped. The method is based on the formation of a plymer metal complex precursor which is prepared through polyesterification between metal citrate complexes and ethyleneglucol. The general idea of this technique is to have a polymer complex with various metal ions, which are uniformly distributed in the polymer network keeping the initial stoichiometric ratio. Heating of the polymer metal complex precursor at high temperature brings about a breakdown of the polymer, which may allow to construct lattices of ceramics oxides directly. It is then assumed in this study that low cation mobility in the highly viscous polymer network causes only little segregation of the various metal ions during the pyrolysis. A particular attention was paid on the phase purity of the product, and the single-phase character of the final product was confirmed by the combined results of X-ray diffraction, Raman scattering and complex magnetic susceptibility measurements. The present paper highlights the advantages of the polymerized complex technique in the synthesis of copper-based ceramic superconductors. Emphasis is placed to outstanding purity of the product as is revealed by superconducting transition widths much sharper than those for ceramic samples previously reported synthesis procedures.

Original languageEnglish
Pages (from-to)137-145
Number of pages9
Journaljournal of the japan society of powder and powder metallurgy
Issue number2
Publication statusPublished - 1993

All Science Journal Classification (ASJC) codes

  • Mechanical Engineering
  • Industrial and Manufacturing Engineering
  • Metals and Alloys
  • Materials Chemistry

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