Mechanical Grinding and Reforming Process of the Bi-2201 Phase

Yasunori Ikeda, Yoshihiro Daitoh, Mikio Takano, Yoshichika Bando, Toshinobu Niinae, Jun Takada

Research output: Contribution to journalArticlepeer-review


Mechanical grinding and the reformation from ground powder of the Bi-2201 phase were examined by XRD, TEM and DTA. The “2201” phase changed easily into amorphous powder and ultra-fine crystals by mechanical grinding. When heated above 800°C, the ground powder reacted to reform the original “2201” phase. The fine “2201” crystals smaller than a critical size remaining in the ground powder were decomposed into Bi2CuO4 and SrCO3 by heating around 500°C in air, while even at room temperature in the air the XRD peaks from these ultra-fine crystals tend to disappear and SrCO3 formed on grinding.

Original languageEnglish
Pages (from-to)183-186
Number of pages4
JournalJournal of the Japan Society of Powder and Powder Metallurgy
Issue number2
Publication statusPublished - 1993
Externally publishedYes

ASJC Scopus subject areas

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


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