Mechanical Grinding and Reforming Process of the Bi-2201 Phase

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

doi:10.2497/jjspm.40.183

Mechanical Grinding and Reforming Process of the Bi-2201 Phase

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

Faculty of Engineering

Research output: Contribution to journal › Article › peer-review

Abstract

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 language	English
Pages (from-to)	183-186
Number of pages	4
Journal	Journal of the Japan Society of Powder and Powder Metallurgy
Volume	40
Issue number	2
DOIs	https://doi.org/10.2497/jjspm.40.183
Publication status	Published - 1993

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

Access to Document

10.2497/jjspm.40.183

Fingerprint Dive into the research topics of 'Mechanical Grinding and Reforming Process of the Bi-2201 Phase'. Together they form a unique fingerprint.

Cite this

@article{e7532c9544244623bb0133e21a03af34,

title = "Mechanical Grinding and Reforming Process of the Bi-2201 Phase",

abstract = "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.",

author = "Yasunori Ikeda and Yoshihiro Daitoh and Mikio Takano and Yoshichika Bando and Toshinobu Niinae and Jun Takada",

year = "1993",

doi = "10.2497/jjspm.40.183",

language = "English",

volume = "40",

pages = "183--186",

journal = "Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy",

issn = "0532-8799",

publisher = "Funtai Funamtsu Yakin Kyokai/Japan Soc. of Powder Metallurgy",

number = "2",

}

TY - JOUR

T1 - Mechanical Grinding and Reforming Process of the Bi-2201 Phase

AU - Ikeda, Yasunori

AU - Daitoh, Yoshihiro

AU - Takano, Mikio

AU - Bando, Yoshichika

AU - Niinae, Toshinobu

AU - Takada, Jun

PY - 1993

Y1 - 1993

N2 - 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.

AB - 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.

UR - http://www.scopus.com/inward/record.url?scp=0027541091&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=0027541091&partnerID=8YFLogxK

U2 - 10.2497/jjspm.40.183

DO - 10.2497/jjspm.40.183

M3 - Article

AN - SCOPUS:0027541091

VL - 40

SP - 183

EP - 186

JO - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

JF - Funtai Oyobi Fummatsu Yakin/Journal of the Japan Society of Powder and Powder Metallurgy

SN - 0532-8799

IS - 2

ER -

Mechanical Grinding and Reforming Process of the Bi-2201 Phase

Abstract

ASJC Scopus subject areas

Access to Document

Other files and links

Cite this