Abstract
Yttrium, barium and copper oxalates are coprecipitated quantitatively from metal acetate solutions with oxalic acid in water-acetone mixtures. The particle-size distribution of the precipitate can be controlled by the precipitation conditions. Thermal decomposition of the coprecipitate leads to single-phase YBa2Cu3O7-x . Despite the intermediate formation of BaCO3, the minimal reaction temperature (770 °C) is clearly lower than that for the solid-state reaction. Results of differential thermal analysis and isothermal thermogravimetry are discussed. The products are characterized by X-ray diffraction and infrared spectroscopy.
This is a preview of subscription content, log in via an institution to check access.
Similar content being viewed by others
References
F. Caillaud, J.-F. Baumard andA. Smith,Mater. Res. Bull. 23 (1988) 1273.
K. Kaneko, H. Ihara andM. Hirabayashi, N. Terada andK. Senzaki,Jpn J. Appl. Phys. 26 (1987) 734.
S. G. Kurashvili,Soobshenija Akad. Nauk. Gruz. SSSR 10 (1949) 593.
M. Jansen andJ. Bredthauer,Z. Anorg. Allg. Chemie 587 (1989) 143.
H. Jaeger andM. Aslan,Ceram. Forum Int. Ber. DKG 66 (1989) 108.
A. Negishi, Y. Takahashi, R. Sakamoto, M. Kamimoto andT. Ozawa,Thermochim. Acta 132 (1988) 15.
R. F. Zhuang, J. B. Qiu andY. P. Zhu,J. Solid State Chem. 86 (1990) 125.
Author information
Authors and Affiliations
Rights and permissions
About this article
Cite this article
Krüger, C., Langbein, H. & Scheler, H. Preparation of YBa2Cu3O7−x by thermal decomposition of coprecipitated oxalates. J Mater Sci 27, 3254–3258 (1992). https://doi.org/10.1007/BF01116021
Received:
Accepted:
Issue Date:
DOI: https://doi.org/10.1007/BF01116021