Mechanical Grinding and Reforming Process of the BI-2201 Phase (II) —Comparing the Various BI-2201 Solid Solutions—

Toshinobu Niinae, Jun Takada, Yasunori Ikeda, Yoshichika Bando

Research output: Contribution to journalArticle

Abstract

Mechanical grinding and the reformation from ground powder of the “2201” phase doped Pb, Ca and Ba were examined by XRD and DTA. The “2201” solid solutions changes easily into fine powder by mechanical grinding. The Ca-or Ba-substitution for Sr tends to suppress the formation of SrCO3 from the ground powder on mechanical grinding in air. The formation of Bi2CuO4 at 400°C and the reformation of the original “2201” phase at 800°C seem to be common for the “2201” solid solutions. The ground powder consists of not amorphous powder but ultra-fine crystals. Each crystal has a diameter of 30 to 100 Å and a thickness of one unit cell or a half unit cell length and thermally unstable.

Original languageEnglish
Pages (from-to)1065-1068
Number of pages4
JournalJournal of the Japan Society of Powder and Powder Metallurgy
Volume40
Issue number11
DOIs
Publication statusPublished - Jan 1 1993

ASJC Scopus subject areas

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

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