Synthesis and characterization of Al-and Y-Al-citrates as potential precursors for YAlO3 |
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| Authors: | Nikolina L. Petrova Dimitar S. Todorovsky Daniela G. Kovacheva Maria M. Milanova |
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| Affiliation: | (1) Faculty of Chemistry, University of Sofia, Sofia, 1164, Bulgaria;(2) Institute of General and Inorganic Chemistry, Bulgarian Academy of Sciences, Sofia, 1113, Bulgaria |
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| Abstract: | ![]()
Al-and Y-Al-citric complexes have been synthesized in ethylene glycol medium at conditions close to the ones used in polymerized complex method and their composition and spectral characteristics have been studied. Proofs have been found for the formation in the bimetallic system of a mixed-metal Al-Y-complex. Doubly ionized and esterified ligands take place in the Al-complex. All of the ligands forming Y-Al-complex are mono-or doubly esterified. Deprotonation of the alcoholic group takes place in the formation of the mixed-metal complex. Both complexes contain adduct-bonded ethylene glycol. Heating of the bimetallic complex or of the polyester resin formed leads to not phase-homogeneous YAlO3-along with cubic YAlO3, its orthorhombic modification as well as Y4Al l2O9 are found by X-ray diffractometry. |
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| Keywords: | Citric complexes polymerized complex method thermochemical behavior yttrium-aluminum perovskite |
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