AN EXPERIMENTAL STUDY OF SUPERCRITICAL FLUID DRYING OF Y-BA-CU OXIDES POWDER FROM AQUEOUS ALCOHOL SUSPENSION USING CARBON DIOXIDE |
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| Authors: | T Tachiwaki Y Takase J Sugimoto M Oda S Kawanaka |
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| Affiliation: |
a Department of Chemical Engineering and Materials Science Doshisha University, Kyotanabe, Kyoto, Japan
b Sharp Corporation Tenri, Nara, 632, Japan |
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| Abstract: | In order to prepare fine Y-Ba-Cu oxides, a suspension of oxide was synthesized by simultaneous hydrolization of 2-propanol solution of yttrium triisopropoxide - barium diisopropoxide - copper diisopropoxide. The suspension could not be dried by the freeze-drying method because the freezing point of aqueous alcohol solvent in the suspension was so low: therefore, supercritical fluid drying was used. Although the diameters of dried powders were larger than expected, the powders containing no BaCO3 were obtained.
The results from this experiment suggest that the supercritical fluid drying method is useful for drying a suspension prepared by the alkoxide method. |
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