Preparation of YBa2Cu3O7-δ powders by the thermal decomposition of a heteronuclear complex, CuY1/3Ba2/3(dhbaen)(NO3)1/3(H2O)3

被引：18

作者：

Hasegawa, E

Aono, H

Igoshi, T

Sakamoto, M

Traversa, E

Sadaoka, Y ^{[1
]}

机构：

[1] Ehime Univ, Fac Engn, Dept Mat Sci & Engn, Matsuyama 7908577, Japan

[2] Yamagata Univ, Fac Sci, Dept Chem, Yamagata 9908560, Japan

[3] Univ Roma Tor Vergata, Dept Chem Sci & Technol, I-00133 Rome, Italy

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 1999年 / 287卷 / 1-2期

关键词：

heteronuclear complex; CuY1/3Ba2/3-complex; YBa2Cu3O7-delta; thermal decomposition; surface analysis; XRD;

D O I：

10.1016/S0925-8388(99)00076-6

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：

YBa2Cu3O7-delta powders were prepared by the thermal decomposition of a heteronuclear complex, CuY1/3Ba2/3(dhbaen)(NO3)(1/3)(H2O)(3). The products of the complex thermal decomposition were analyzed by TG-DTA, XRD, SEM-Auger and XPS. The decomposition of the CuY1/3Ba2/3-complex was obtained at about 500 degrees C and the product was a mixture of oxides and carbonates. The formation of YBa2Cu3O7-delta proceeded at 800 degrees C, with a gradual decomposition of the carbonates. A homogeneous distribution of each element, Y, Ba and Cu, was observed for the decomposed CuY1/3Ba2/3-complex by SEM-Auger analysis. The binding energy values of Ba-3d5/2 and O1s photolines from Ba and O in the superconductive lattice did not shift during the sputtering period. Furthermore, the formation of Ba rich regions on the surface was depressed by using the complex as a starting material for homogeneous 123-oxide, YBa2Cu3O7-delta. (C) 1999 Elsevier Science S.A. All rights reserved.

引用

页码：150 / 158

页数：9

共 20 条

[1] FROM COMPOUNDS TO MATERIALS - HETERODINUCLEAR COMPLEXES AS PRECURSORS IN THE SYNTHESIS OF MIXED OXIDES - CRYSTAL-STRUCTURES OF [CU(H2LA)] AND [(CUY(LA)(NO3)(DMSO))2]2DMSO [H4LA = N,N'-ETHYLENEBIS(3-HYDROXYSALICYLIDENEIMINE), DMSO = DIMETHYL-SULFOXIDE] [J].