KINETICS AND MECHANISMS OF THE FORMATION OF YBA2CU3O7-X

被引：18

作者：

FLOR, G ^{[1
]}

SCAVINI, M ^{[1
]}

ANSELMITAMBURINI, U ^{[1
]}

SPINOLO, G ^{[1
]}

机构：

[1] UNIV PAVIA,CNR,CSTE,I-27100 PAVIA,ITALY

来源：

SOLID STATE IONICS | 1990年 / 43卷

关键词：

D O I：

10.1016/0167-2738(90)90473-5

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

The paper reports diffusion experiments on the systems: BaCO3+CuO, BaCO3+Y2O3, Y2O3+CuO, BaCO3+Y2Cu2O5, Y2O3+BaCuO2, and Y2Cu2O5+BaCuO2. The results are discussed in connection with X-ray diffraction measurements on the corresponding powder mixtures and on ternary BaCO3+CuO+Y2O3 mixtures. For YBa2Cu3O6.5 formation, a three-step mechanism is proposed on the basis of transport and thermodynamic properties according to the sequence: (i) BaCO3+CuO→BaCuO2+CO2; (ii) Y2O3+2CuO→Y2Cu2O5; (iii) 4BaCuO2+Y2Cu2O5→2YBa2Cu3O6.5. © 1990.

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页码：77 / 83

页数：7

相关论文

共 23 条

[1] KINETICS AND THERMODYNAMICS OF DECOMPOSITION OF BARIUM CARBONATE [J].

BASU, TK ;

SEARCY, AW .

JOURNAL OF THE CHEMICAL SOCIETY-FARADAY TRANSACTIONS I, 1976, 72 :1889-1895

[2] COMPARATIVE-STUDY OF SYNTHETIC PROCEDURES FOR YBACUO-TYPE OXIDES [J].

BELTRANPORTER, D ;

MARTINEZTAMAYO, E ;

IBANEZ, R ;

BELTRANPORTER, A ;

FOLGADO, JV ;

ESCRIVA, E ;

MUNOZ, V ;

SEGURA, A ;

MARTINEZPASTOR, J .

SOLID STATE IONICS, 1989, 32-3 :1160-1166

[3] IONIC-CONDUCTIVITY OF OXYGEN IONS IN YBA2CU3O7-X [J].

CARRILLOCABRERA, W ;

WIEMHOFER, HD ;

GOPEL, W .

SOLID STATE IONICS, 1989, 32-3 :1172-1178

[4] YBA2CU3O7-X - TRANSPORT-PROPERTIES AND DEFECTS AT HIGH-TEMPERATURE [J].

CHIODELLI, G ;

CAMPARIVIGANO, G ;

FLOR, G .

ZEITSCHRIFT FUR NATURFORSCHUNG SECTION A-A JOURNAL OF PHYSICAL SCIENCES, 1989, 44 (12) :1167-1171

[5] ISSUES IN THE PROCESSING OF CUPRATE CERAMIC SUPERCONDUCTORS [J].

CLARKE, DR ;

SHAW, TM ;

DIMOS, D .

JOURNAL OF THE AMERICAN CERAMIC SOCIETY, 1989, 72 (07) :1103-1113

[6] KINETICS AND REACTION-MECHANISMS FOR FORMATION AND DECOMPOSITION OF BA2YCU3OX [J].

GADALLA, AM ;

HEGG, T .

THERMOCHIMICA ACTA, 1989, 145 :149-163

[7]

GOD MAN P, 1989, J AM CERAM SOC, V72, P856

[8] PHYSICAL-PROPERTIES OF THE QUATERNARY OXIDE SUPERCONDUCTOR YBA2CU3O7 [J].

HOLLAND, GF ;

STACY, AM .

ACCOUNTS OF CHEMICAL RESEARCH, 1988, 21 (01) :8-15

[9] THE EFFECT OF SYNTHESIS METHODS ON THE PROCESSING AND PROPERTIES OF YBA2CU3O6+X [J].

HOROWITZ, HS ;

BORDIA, RK ;

TORARDI, CC ;

MORRISSEY, KJ ;

SUBRAMANIAN, MA ;

MCCARRON, EM ;

MICHEL, JB ;

ASKEW, TR ;

FLIPPEN, RB ;

BOLT, JD ;

CHOWDHRY, U .

SOLID STATE IONICS, 1989, 32-3 :1087-1099

[10]

LASKELA M, 1988, MAT RES B, V23, P1469