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

[11] PRESSED AND COLD-ROLLED AG-SHEATHED BI(2223) TAPES - A COMPARISON [J].

GRASSO, G ;

PERIN, A ;

HENSEL, B ;

FLUKIGER, R .

PHYSICA C, 1993, 217 (3-4) :335-341

[12]

Grasso G., 1995, Superconductivity and Superconducting Materials Technologies. Proceedings of Topical Symposium IV on Superconductivity and Superconducting Materials Technologies of the 8th CIMTEC-World Ceramics Congress and Forum on New Materials, P437

[13]

GRASSO G, 1995, P EUCAS ED 3 6 JUL 1, V1, P395

[14] Kinetic study of the growth of the (Bi,Pb)(2)Ca2Sr2Cu3O10 phase from calcined precursor powders [J].

Grivel, JC ;

Flukiger, R .

JOURNAL OF ALLOYS AND COMPOUNDS, 1996, 235 (01) :53-58

[15]

GRIVEL JC, 1993, P ICMAS 93 PAR, P359

[16] LIMITS TO THE CRITICAL TRANSPORT CURRENT IN SUPERCONDUCTING (BI,PB)(2)SR2CA2CU3O10 SILVER-SHEATHED TAPES - THE RAILWAY-SWITCH MODEL [J].

HENSEL, B ;

GRASSO, G ;

FLUKIGER, R .

PHYSICAL REVIEW B, 1995, 51 (21) :15456-15473

[17] A MODEL FOR THE CRITICAL CURRENT IN (BI,PB)2SR2CA2CU3OX SILVER-SHEATHED TAPES - THE ROLE OF SMALL-ANGLE C-AXIS GRAIN-BOUNDARIES AND OF THE TEXTURE [J].

HENSEL, B ;

GRIVEL, JC ;

JEREMIE, A ;

PERIN, A ;

POLLINI, A ;

FLUKIGER, R .

PHYSICA C, 1993, 205 (3-4) :329-337

[18] Enhanced critical current densities in (Bi, Pb)(2)Sr2Ca2Cu3O10 silver-sheathed tapes by splayed columnar defects after 600 MeV proton irradiation [J].

Hensel, B ;

Marti, F ;

Grasso, G ;

Dhalle, M ;

Flukiger, R ;

Paschoud, F ;

Victoria, M .

IEEE TRANSACTIONS ON APPLIED SUPERCONDUCTIVITY, 1997, 7 (02) :2030-2033

[19] 2-DIMENSIONAL BEHAVIOR AND CRITICAL CURRENT ANISOTROPY IN (BI,PB)2SR2CA2CU3O10+X TAPES [J].

HU, QY ;

WEBER, HW ;

DOU, SX ;

LIU, HK ;

NEUMULLER, HW .

JOURNAL OF ALLOYS AND COMPOUNDS, 1993, 195 (1-2) :515-518

[20]

KOBAYASHI SI, 1995, PHYSICA C, V258, P336

← 1 2 3 4 →