Mechanical Grinding and Reforming Process of the Pb-substituted 2223 Phase

Jun Takada; Masahiro Nagae; Yoshihiro Kusano; Tokuro Nanbav; Mikio Takano

doi:10.2497/jjspm.41.396

Mechanical Grinding and Reforming Process of the Pb-substituted 2223 Phase

Jun Takada, Masahiro Nagae, Yoshihiro Kusano, Tokuro Nanbav, Mikio Takano

Faculty of Engineering

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

Abstract

Mechanical grinding and reforming process of the Pb-substituted 2223 phase has been studied for the monophasic samples with a composition of Bi_0.9Pb_0.2SrCaCu_1.6O₂. The 2223 phase changes to ultla-fine powder by full grinding, exhibiting no magnetic response, while the ultra-fine powder and the small 2223 crystals coexist in samples ground for short periods. Some second phases were formed in the ground powder subjected to heating at temperatures between 500° and 800°C. On the other hand, annealing of the bulk samples below 800°C leads to precipitation of the 3321 phase identified as Sr_2.5Bi_0.5Pb₃Ca₂CuO₂. Precipitation of second phases in the coexistent powder was interpreted by those in ultra-fine powder and bulk samples.

Original language	English
Pages (from-to)	396-399
Number of pages	4
Journal	Journal of the Japan Society of Powder and Powder Metallurgy
Volume	41
Issue number	4
DOIs	https://doi.org/10.2497/jjspm.41.396
Publication status	Published - 1994

ASJC Scopus subject areas

Mechanical Engineering
Industrial and Manufacturing Engineering
Metals and Alloys
Materials Chemistry

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abstract = "Mechanical grinding and reforming process of the Pb-substituted 2223 phase has been studied for the monophasic samples with a composition of Bi0.9Pb0.2SrCaCu1.6O2. The 2223 phase changes to ultla-fine powder by full grinding, exhibiting no magnetic response, while the ultra-fine powder and the small 2223 crystals coexist in samples ground for short periods. Some second phases were formed in the ground powder subjected to heating at temperatures between 500° and 800°C. On the other hand, annealing of the bulk samples below 800°C leads to precipitation of the 3321 phase identified as Sr2.5Bi0.5Pb3Ca2CuO2. Precipitation of second phases in the coexistent powder was interpreted by those in ultra-fine powder and bulk samples.",

author = "Jun Takada and Masahiro Nagae and Yoshihiro Kusano and Tokuro Nanbav and Mikio Takano",

year = "1994",

doi = "10.2497/jjspm.41.396",

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T1 - Mechanical Grinding and Reforming Process of the Pb-substituted 2223 Phase

AU - Takada, Jun

AU - Nagae, Masahiro

AU - Kusano, Yoshihiro

AU - Nanbav, Tokuro

AU - Takano, Mikio

PY - 1994

Y1 - 1994

N2 - Mechanical grinding and reforming process of the Pb-substituted 2223 phase has been studied for the monophasic samples with a composition of Bi0.9Pb0.2SrCaCu1.6O2. The 2223 phase changes to ultla-fine powder by full grinding, exhibiting no magnetic response, while the ultra-fine powder and the small 2223 crystals coexist in samples ground for short periods. Some second phases were formed in the ground powder subjected to heating at temperatures between 500° and 800°C. On the other hand, annealing of the bulk samples below 800°C leads to precipitation of the 3321 phase identified as Sr2.5Bi0.5Pb3Ca2CuO2. Precipitation of second phases in the coexistent powder was interpreted by those in ultra-fine powder and bulk samples.

AB - Mechanical grinding and reforming process of the Pb-substituted 2223 phase has been studied for the monophasic samples with a composition of Bi0.9Pb0.2SrCaCu1.6O2. The 2223 phase changes to ultla-fine powder by full grinding, exhibiting no magnetic response, while the ultra-fine powder and the small 2223 crystals coexist in samples ground for short periods. Some second phases were formed in the ground powder subjected to heating at temperatures between 500° and 800°C. On the other hand, annealing of the bulk samples below 800°C leads to precipitation of the 3321 phase identified as Sr2.5Bi0.5Pb3Ca2CuO2. Precipitation of second phases in the coexistent powder was interpreted by those in ultra-fine powder and bulk samples.

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Mechanical Grinding and Reforming Process of the Pb-substituted 2223 Phase

Abstract

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