OCCURRENCE OF FREE CUO IN YBA2CU3O6+DELTA AND ITS EFFECT ON MELTING AND SOLIDIFICATION

被引：28

作者：

ASELAGE, TL

机构：

[1] Dept. 1153, Sandia National Laboratories, Albuquerque

来源：

PHYSICA C | 1994年 / 233卷 / 3-4期

关键词：

D O I：

10.1016/0921-4534(94)90755-2

中图分类号：

O59 [应用物理学];

学科分类号：

摘要：

An endothermic reaction is frequently observed in samples of YBa2Cu3O6+delta (123) at temperatures of about 940 degrees C in air or 965 degrees C in O-2. The origin of this endotherm was examined by differential thermal analysis, microstructural analysis, and by a critical review of the pertinent literature. It is concluded that this endothermic reaction is caused by the presence of free CuO in 123 samples. Potential sources of free CuO in 123 are considered, and the effect of free CuO on the melting and solidification of 123 is discussed.

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页码：292 / 300

页数：9

相关论文

共 38 条

[1] QUATERNARY PHASE-RELATIONS NEAR YBA2CU3O6+X AT 850-DEGREES-C IN REDUCED OXYGEN PRESSURES [J].

AHN, BT ;

LEE, VY ;

BEYERS, R ;

GUR, TM ;

HUGGINS, RA .

PHYSICA C, 1990, 167 (5-6) :529-537

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

ASELAGE, T ;

KEEFER, K .

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

[3]

ASELAGE TL, 1990, CERAMIC T, V13, P77

[4] DIRECT OBSERVATION OF TEXTURED YBA2CU3O7-DELTA CRYSTAL-GROWTH FROM THE MELT [J].

CHEN, BJ ;

RODRIGUEZ, MA ;

MISTURE, ST ;

SNYDER, RL .

PHYSICA C, 1992, 198 (1-2) :118-124

[5] EFFECT OF UNDERCOOLING TEMPERATURE ON THE SOLIDIFICATION KINETICS AND MORPHOLOGY OF Y-BA-CU-O DURING MELT TEXTURING [J].

CHEN, BJ ;

RODRIGUEZ, MA ;

MISTURE, ST ;

SNYDER, RL .

PHYSICA C, 1993, 217 (3-4) :367-375

[6] CONTROLLED HETEROGENEOUS NUCLEATION OF MELT-TEXTURED YBA2CU3O6+X BY ADDITION OF AL2O3 PARTICLES [J].

CHEN, YL ;

ZHANG, LJ ;

CHAN, HM ;

HARMER, MP .

JOURNAL OF MATERIALS RESEARCH, 1993, 8 (09) :2128-2133

[7] CARBONATIZATION OF YBA2CU3O6+X [J].

FJELLVAG, H ;

KAREN, P ;

KJEKSHUS, A ;

KOFSTAD, P ;

NORBY, T .

ACTA CHEMICA SCANDINAVICA SERIES A-PHYSICAL AND INORGANIC CHEMISTRY, 1988, 42 (03) :178-184

[8]

FRASE KG, 1987, J AM CERAM SOC, V70, pC204, DOI 10.1111/j.1151-2916.1987.tb05740.x

[9] DECOMPOSITION OF YBA2CU3O7-X DURING ANNEALING IN CO2/O2 MIXTURES [J].

GAO, Y ;

MERKLE, KL ;

ZHANG, C ;

BALACHANDRAN, U ;

POEPPEL, RB .

JOURNAL OF MATERIALS RESEARCH, 1990, 5 (07) :1363-1367

[10] IMPLICATIONS OF THE Y2O3-BAO-CUO LIQUIDUS FOR PROCESSING PURE YBA2CU3O7-X MATERIAL [J].

GERVAIS, M ;

ODIER, P ;

COUTURES, JP .

MATERIALS SCIENCE AND ENGINEERING B-SOLID STATE MATERIALS FOR ADVANCED TECHNOLOGY, 1991, 8 (04) :287-294

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