Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)-Effect of Annealing Atmosphare on Tc

Naoya Kobayashi; Keiichi Morikawa; Masataka Kanai; Kazutoyo Shimizu; Yoshihiro Kusano; Kazuhiro Yamaguchi; Minoru Fukuhara; Akira Doi; Toshio Takada; Jun Takada; Yasunori Ikeda; Mikio Takano

doi:10.2497/jjspm.39.783

Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)-Effect of Annealing Atmosphare on Tc

Naoya Kobayashi, Keiichi Morikawa, Masataka Kanai, Kazutoyo Shimizu, Yoshihiro Kusano, Kazuhiro Yamaguchi, Minoru Fukuhara, Akira Doi, Toshio Takada, Jun Takada, Yasunori Ikeda, Mikio Takano

Research output: Contribution to journal › Article

Abstract

Effect of annealing atmosphere and temperature on the superconducting properties Tchave been discussed in the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system. Special attention has been given to oxygen sorption/desorption and formation of impurity phases. The bulk samples without presence of amorphous phase formed due to mechanical grinding were used for compositions of Bi_0.9Pb_0.2Sr_1.0Ba_xCa_1.0Cu_1.6O_z (x=0 and 0.05). Annealing in O2 and air above 700»C leads to marked weight increase and formation of (Bi,Pb)3Sr₂Ca₂CuO₂. In contrast,almost monophasic samples of the high-Tc phase,absent from any impurity phases,were obtained on annealing in Ar. Furthermore,the weight of samples with x=0 and 0.05 decreses by Ar-annealing at temperatures of 350»C and 800-830»C. The weight decrease due to oxygen-desorption results inan elongation of the c-axis length of the high-Tc phase,accompanying an increase in Tc.

Original language	English
Pages (from-to)	783-786
Number of pages	4
Journal	journal of the japan society of powder and powder metallurgy
Volume	39
Issue number	9
DOIs	https://doi.org/10.2497/jjspm.39.783
Publication status	Published - 1991
Externally published	Yes

Fingerprint

ASJC Scopus subject areas

Mechanical Engineering
Metals and Alloys
Industrial and Manufacturing Engineering
Materials Chemistry

Cite this

Kobayashi, N., Morikawa, K., Kanai, M., Shimizu, K., Kusano, Y., Yamaguchi, K., Fukuhara, M., Doi, A., Takada, T., Takada, J., Ikeda, Y., & Takano, M. (1991). Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)-Effect of Annealing Atmosphare on Tc. journal of the japan society of powder and powder metallurgy, 39(9), 783-786. https://doi.org/10.2497/jjspm.39.783

Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)-Effect of Annealing Atmosphare on Tc. / Kobayashi, Naoya; Morikawa, Keiichi; Kanai, Masataka; Shimizu, Kazutoyo; Kusano, Yoshihiro; Yamaguchi, Kazuhiro; Fukuhara, Minoru; Doi, Akira; Takada, Toshio; Takada, Jun; Ikeda, Yasunori; Takano, Mikio.

In: journal of the japan society of powder and powder metallurgy, Vol. 39, No. 9, 1991, p. 783-786.

Research output: Contribution to journal › Article

Kobayashi, N, Morikawa, K, Kanai, M, Shimizu, K, Kusano, Y, Yamaguchi, K, Fukuhara, M, Doi, A, Takada, T, Takada, J, Ikeda, Y & Takano, M 1991, 'Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)-Effect of Annealing Atmosphare on Tc', journal of the japan society of powder and powder metallurgy, vol. 39, no. 9, pp. 783-786. https://doi.org/10.2497/jjspm.39.783

Kobayashi, Naoya ; Morikawa, Keiichi ; Kanai, Masataka ; Shimizu, Kazutoyo ; Kusano, Yoshihiro ; Yamaguchi, Kazuhiro ; Fukuhara, Minoru ; Doi, Akira ; Takada, Toshio ; Takada, Jun ; Ikeda, Yasunori ; Takano, Mikio. / Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)-Effect of Annealing Atmosphare on Tc. In: journal of the japan society of powder and powder metallurgy. 1991 ; Vol. 39, No. 9. pp. 783-786.

@article{ad438c0743bf4dfbbd47ee3b6b904848,

title = "Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)-Effect of Annealing Atmosphare on Tc",

abstract = "Effect of annealing atmosphere and temperature on the superconducting properties Tchave been discussed in the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system. Special attention has been given to oxygen sorption/desorption and formation of impurity phases. The bulk samples without presence of amorphous phase formed due to mechanical grinding were used for compositions of Bi0.9Pb0.2Sr1.0BaxCa1.0Cu1.6Oz (x=0 and 0.05). Annealing in O2 and air above 700»C leads to marked weight increase and formation of (Bi,Pb)3Sr2Ca2CuO2. In contrast,almost monophasic samples of the high-Tc phase,absent from any impurity phases,were obtained on annealing in Ar. Furthermore,the weight of samples with x=0 and 0.05 decreses by Ar-annealing at temperatures of 350»C and 800-830»C. The weight decrease due to oxygen-desorption results inan elongation of the c-axis length of the high-Tc phase,accompanying an increase in Tc.",

author = "Naoya Kobayashi and Keiichi Morikawa and Masataka Kanai and Kazutoyo Shimizu and Yoshihiro Kusano and Kazuhiro Yamaguchi and Minoru Fukuhara and Akira Doi and Toshio Takada and Jun Takada and Yasunori Ikeda and Mikio Takano",

year = "1991",

doi = "10.2497/jjspm.39.783",

language = "English",

volume = "39",

pages = "783--786",

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 = "9",

}

TY - JOUR

T1 - Chemical and Mechanical Stability of the High-Tc Phase in the Bi-Pb-Sr-Ca-Cu-O System (II)-Effect of Annealing Atmosphare on Tc

AU - Kobayashi, Naoya

AU - Morikawa, Keiichi

AU - Kanai, Masataka

AU - Shimizu, Kazutoyo

AU - Kusano, Yoshihiro

AU - Yamaguchi, Kazuhiro

AU - Fukuhara, Minoru

AU - Doi, Akira

AU - Takada, Toshio

AU - Takada, Jun

AU - Ikeda, Yasunori

AU - Takano, Mikio

PY - 1991

Y1 - 1991

N2 - Effect of annealing atmosphere and temperature on the superconducting properties Tchave been discussed in the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system. Special attention has been given to oxygen sorption/desorption and formation of impurity phases. The bulk samples without presence of amorphous phase formed due to mechanical grinding were used for compositions of Bi0.9Pb0.2Sr1.0BaxCa1.0Cu1.6Oz (x=0 and 0.05). Annealing in O2 and air above 700»C leads to marked weight increase and formation of (Bi,Pb)3Sr2Ca2CuO2. In contrast,almost monophasic samples of the high-Tc phase,absent from any impurity phases,were obtained on annealing in Ar. Furthermore,the weight of samples with x=0 and 0.05 decreses by Ar-annealing at temperatures of 350»C and 800-830»C. The weight decrease due to oxygen-desorption results inan elongation of the c-axis length of the high-Tc phase,accompanying an increase in Tc.

AB - Effect of annealing atmosphere and temperature on the superconducting properties Tchave been discussed in the high-Tc phase in the Bi-Pb-Sr-Ca-Cu-O system. Special attention has been given to oxygen sorption/desorption and formation of impurity phases. The bulk samples without presence of amorphous phase formed due to mechanical grinding were used for compositions of Bi0.9Pb0.2Sr1.0BaxCa1.0Cu1.6Oz (x=0 and 0.05). Annealing in O2 and air above 700»C leads to marked weight increase and formation of (Bi,Pb)3Sr2Ca2CuO2. In contrast,almost monophasic samples of the high-Tc phase,absent from any impurity phases,were obtained on annealing in Ar. Furthermore,the weight of samples with x=0 and 0.05 decreses by Ar-annealing at temperatures of 350»C and 800-830»C. The weight decrease due to oxygen-desorption results inan elongation of the c-axis length of the high-Tc phase,accompanying an increase in Tc.

UR - http://www.scopus.com/inward/record.url?scp=85004387242&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=85004387242&partnerID=8YFLogxK

U2 - 10.2497/jjspm.39.783

DO - 10.2497/jjspm.39.783

M3 - Article

AN - SCOPUS:85004387242

VL - 39

SP - 783

EP - 786

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 - 9

ER -

Access to Document

10.2497/jjspm.39.783