Effects of the reaction time on various properties of (Bi,Pb)2Sr2Ca2Cu3Ox tapes

被引：38

作者：

Marti, F ^{[1
]}

Grasso, G ^{[1
]}

Grivel, JC ^{[1
]}

Flukiger, R ^{[1
]}

机构：

[1] Univ Geneva, Dept Phys Mat Condensee, CH-1211 Geneva 4, Switzerland

来源：

SUPERCONDUCTOR SCIENCE & TECHNOLOGY | 1998年 / 11卷 / 05期

关键词：

D O I：

10.1088/0953-2048/11/5/008

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

The mechanisms leading to a maximum of j(c) as a function of reaction time in (Bi, Pb)(2)Sr2Ca2Cu3Ox monofilamentary tapes are investigated. Various properties of tapes previously reacted for 40 h in air at 837 degrees C, rolled and submitted to additional reaction during times varying from 40 to 240 h were measured. The evolution of the morphology, phase assembly, stoichiometry, weight, critical temperature, critical current and irreversibility line is described. XRD and SEM analysis reveal no decomposition of the Bi(2223) phase and no noticeable grain growth after the 40 h additional time. Pb losses up to 40% were detected by means of thermogravimetry and EDX as function of reaction time, while an increase of T-c from 107.25 to 109 K was observed. On transport and magnetic measurements, it is found that the observed maximum of j(c) at about 180 h is the result of two competing effects: (a) the improvement of the quality of grain boundaries and (b) the decrease of the pinning efficiency in the grains.

引用

页码：485 / 495

页数：11

共 37 条

[1] MAGNETIZATION OF HIGH-FIELD SUPERCONDUCTORS [J].

BEAN, CP .

REVIEWS OF MODERN PHYSICS, 1964, 36 (1P1) :31-+

[2] A COMPARISON OF LEAD-DOPED BI-SR-CA-CU-O SUPERCONDUCTORS AT THE 2223 COMPOSITIONS AND 2234 COMPOSITIONS [J].

BUTTON, TW ;

ALFORD, NM ;

BIRCHALL, JD ;

WELLHOFER, F ;

GOUGH, CE ;

OCONNOR, DA .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1989, 2 (04) :224-229

[3]

DEUTSCHER G, 1990, EARLIER RECENT ASPEC

[4] Experimental assessment of the current-limiting mechanisms in BSCCO/Ag high-temperature superconducting tapes [J].

Dhalle, M ;

Cuthbert, M ;

Johnston, MD ;

Everett, J ;

Flukiger, R ;

Dou, SX ;

Goldacker, W ;

Beales, T ;

Caplin, AD .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1997, 10 (01) :21-31

[5]

FLUKIGER R, 1992, ADV CRYOG ENG, V38, P1073

[6] Phase formation and critical current density in Bi,Pb(2223) tapes [J].

Flukiger, R ;

Grasso, G ;

Grivel, JC ;

Marti, F ;

Dhalle, M ;

Huang, Y .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1997, 10 (7A) :A68-A92

[7]

FRELLO T, 1997, I PHYS C SER, V158, P1363

[8] Correlation between the normal state resistivity and the critical current density of Ag sheathed Bi(2223) tapes [J].

Grasso, G ;

Marti, F ;

Huang, Y ;

Perin, A ;

Flukiger, R .

PHYSICA C, 1997, 281 (04) :271-277

[9] OPTIMIZATION OF THE PREPARATION PARAMETERS OF MONOFILAMENTARY BI(2223) TAPES AND THE EFFECT OF THE ROLLING PRESSURE ON J(C) [J].

GRASSO, G ;

JEREMIE, A ;

FLUKIGER, R .

SUPERCONDUCTOR SCIENCE & TECHNOLOGY, 1995, 8 (11) :827-832

[10] DISTRIBUTION OF THE TRANSPORT CRITICAL-CURRENT DENSITY IN AG SHEATHED (BI,PB)2SR2CA2CU3OX TAPES PRODUCED BY ROLLING [J].

GRASSO, G ;

HENSEL, B ;

JEREMIE, A ;

FLUKIGER, R .

PHYSICA C, 1995, 241 (1-2) :45-52

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