Preparation of by the Oxalate Coprecipitation Method and its Powder Characterization

Yoshio Oka, Naoichi Yamamoto, Yoichi Tomii, Hitoshi Kitaguchi, Jun Takada, Akiyoshi Osaka, Yoshinari Mimura, Masao Kiyama

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3 Citations (Scopus)


The oxalate coprecipitation method was applied to the preparation of high-Tc superconducting oxide powder. The process of forming the oxide through the pyrolysis and subsequent heat treatment was studied in connection with powder characterization. The oxalate copreciptate, being fine powder with in size, consisted of Y-Ba complex and Cu oxalates. The pyrolysis proceeded mostly by three steps in the order of dehydration, decomposition of Cu oxalate and that of Y-Ba oxalate, resulting in CuO and BaC03phases at 500*0 for 2h without changing particle shape. Heat treatment avobe 850*0 was favorable to obtain the oxide powder with single phase. Its particles were less than 2jum in size when treated below 9250 and drastically grew to more than 10/4. above 950°C with plate-like shape.

Original languageEnglish
Pages (from-to)590-596
Number of pages7
JournalJournal of the Japan Society of Powder and Powder Metallurgy
Issue number10
Publication statusPublished - 1987

ASJC Scopus subject areas

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


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