TY - JOUR
T1 - Preparation of YBa2Cu3O7-δ powders by the thermal decomposition of a heteronuclear complex, CuY1/3Ba2/3(dhbaen)(NO3)1/3(H2O)3
AU - Hasegawa, Etsuko
AU - Aono, Hiromichi
AU - Igoshi, Tetsuya
AU - Sakamoto, Masatomi
AU - Traversa, Enrico
AU - Sadaoka, Yoshihiko
N1 - Funding Information:
The present work was supported by Grant-in-Aids from The Ministry of Education, Science and Culture of Japan (Nos. 10650811 and 10045045), and by HOSOKAWA Powder Technology Foundation.
PY - 1999/6/1
Y1 - 1999/6/1
N2 - YBa2Cu3O7-δ 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°C and the product was a mixture of oxides and carbonates. The formation of YBa2Cu3O7-δ proceeded at 800°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 Ba3d5/2 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-δ.
AB - YBa2Cu3O7-δ 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°C and the product was a mixture of oxides and carbonates. The formation of YBa2Cu3O7-δ proceeded at 800°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 Ba3d5/2 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-δ.
UR - http://www.scopus.com/inward/record.url?scp=0032630421&partnerID=8YFLogxK
U2 - 10.1016/S0925-8388(99)00076-6
DO - 10.1016/S0925-8388(99)00076-6
M3 - Article
AN - SCOPUS:0032630421
SN - 0925-8388
VL - 287
SP - 150
EP - 158
JO - Journal of Alloys and Compounds
JF - Journal of Alloys and Compounds
IS - 1-2
ER -