DETERMINATION OF THE EUTECTIC COMPOSITION BY CRYSTAL-GROWTH AND FLUX SEPARATION - EXAMPLE BACUO2-CUOX

被引：20

作者：

LICCI, F

SCHEEL, HJ

TISSOT, P

机构：

[1] SWISS FED INST TECHNOL,INST MICRO & OPTOELECTR,DEPT PHYS,CH-1015 LAUSANNE,SWITZERLAND

[2] UNIV GENEVA,DEPT MINERAL ANALYT & APPL CHEM,CH-1211 GENEVA 4,SWITZERLAND

来源：

JOURNAL OF CRYSTAL GROWTH | 1991年 / 112卷 / 2-3期

关键词：

D O I：

10.1016/0022-0248(91)90342-3

中图分类号：

O7 [晶体学];

学科分类号：

0702 ; 070205 ; 0703 ; 080501 ;

摘要：

The BaCuO2-CuO(x) phase diagram is of interest for synthesis and crystallization of the yttrium barium cuprate high-temperature superconductors and the thallium barium calcium cuprates. In this system there are difficulties in detecting the liquidus temperatures by DTA, and the microscopic study of the sequence of crystallization is impeded by the opaqueness of the crystalline phases BaCuO2 and CuO. The problem of the determination of the eutectic composition could be solved by crystal growth and flux separation above the eutectic temperature, by identification of the crystals, and by annealing experiments. The eutectic was found at 29 +/- 1.5 mol% BaO and 910 +/- 10-degrees-C in air, and at 33 +/- 3 mol% BaO and 930 +/- 10-degrees-C in oxygen atmosphere.

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页码：600 / 605

页数：6

相关论文

共 22 条

[1] LIQUIDUS RELATIONS IN Y-BA-CU OXIDES [J].

ASELAGE, T ;

KEEFER, K .

JOURNAL OF MATERIALS RESEARCH, 1988, 3 (06) :1279-1291

[2] GROWTH OF SINGLE-CRYSTALS OF THE HIGH-TEMPERATURE SUPERCONDUCTOR YBA2CU3O7-X [J].

BALESTRINO, G ;

BARBANERA, S ;

PAROLI, P .

JOURNAL OF CRYSTAL GROWTH, 1987, 85 (04) :585-587

[3] FLUX SEPARATION IN CRYSTAL-GROWTH OF YBA2CU3O7-X [J].

BOUTELLIER, R ;

SUN, BN ;

SCHEEL, HJ ;

SCHMID, H .

JOURNAL OF CRYSTAL GROWTH, 1989, 96 (02) :465-467

[4] CRYSTALLIZATION OF HIGH-TEMPERATURE SUPERCONDUCTORS FROM NONSTOICHIOMETRIC MELTS [J].

BYKOV, AB ;

DEMIANETS, LN ;

ZIBROV, IP ;

KANUNNIKOV, GV ;

MELNIKOV, OK ;

STISHOV, SM .

JOURNAL OF CRYSTAL GROWTH, 1988, 91 (03) :302-307

[5] COMPOUNDS AND PHASE COMPATIBILITIES IN THE SYSTEM Y2O3-BAO-CUO AT 950-DEGREES-C [J].

DELEEUW, DM ;

MUTSAERS, CAHA ;

LANGEREIS, C ;

SMOORENBURG, HCA ;

ROMMERS, PJ .

PHYSICA C, 1988, 152 (01) :39-49

[6] PHASE-RELATIONS AND CRYSTAL-GROWTH OF YBA2CU3O7-DELTA IN THE SYSTEM YO1.5-BAO-CUO [J].

FISCHER, K ;

HERGT, R ;

LINZEN, D .

CRYSTAL RESEARCH AND TECHNOLOGY, 1988, 23 (09) :1169-1174

[7] PHASE-RELATIONS IN THE VICINITY OF THE COMPOUND YBA2CU3O7-DELTA AT CONSTANT OXYGEN-PRESSURE [J].

GRAF, T ;

JORDA, JL ;

MULLER, J .

JOURNAL OF THE LESS-COMMON METALS, 1989, 146 (1-2) :49-58

[8] PREPARATION AND MICROSTRUCTURE OF HIGH-DENSITY Y1BA2CU3O7-DELTA [J].

GREUTER, F ;

KLUGEWEISS, P ;

ZIMMERMANN, H ;

SCHULER, C .

PHYSICA C, 1988, 153 (01) :361-362

[9] THERMOANALYTICAL AND X-RAY-DIFFRACTION INVESTIGATIONS OF BA2CU3O5+D FOR PREPARATION OF Y-BA-CU-O SUPERCONDUCTORS [J].

HALASZ, I ;

FULOP, V ;

KIRSCHNER, I ;

PORJESZ, T .

JOURNAL OF CRYSTAL GROWTH, 1988, 91 (03) :444-449

[10] MELT-PROCESSIBLE RARE EARTH-BA-CU-O SUPERCONDUCTORS BASED ON MOLTEN BA-CU OXIDES [J].

HERMANN, AM ;

SHENG, ZZ .

APPLIED PHYSICS LETTERS, 1987, 51 (22) :1854-1856