New Synthetic Approach to Yttrium Hydroxoacetates, Structural Characterization, and Use as a Precursor for Coated Conductors
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- 作者：Peter Lobinger ; Harald Jarzina ; Herbert W. Roesky ; Sanjay Singh ; S. Shravan Kumar ; Hans-Georg Schmidt ; Matthias Noltemeyer ; and Herbert C. Freyhardt
- 刊名：Inorganic Chemistry
- 出版年：2005
- 出版时间：December 12, 2005
- 年：2005
- 卷：44
- 期：25
- 页码：9192 - 9196
- 全文大小：306K
- 年卷期：v.44,no.25(December 12, 2005)
- ISSN：1520-510X
文摘
A novel synthetic approach is given for the preparation of a metal-organic lanthanide sol-gel precursor solutionand its application for the production of coated conductors. Besides all other problems concerning the technicalprocess itself, the key to a successful deposition of oxide layers is the choice of the precursor solution and theunderstanding of the mechanism of deposition. Moreover, the isolation and characterization of the species involvedin the reaction is very important. Regarding the complex process occurring during the formation of the surfacelayer, it is obvious that the best choice should have a compound already containing the final composition of thelayer. Two compounds of composition [Y(OAc)3(H2O)2]2 (1) and [Y(OAc)3]2(H2O) (2) were isolated from their precursorsolution and characterized by X-ray structural analysis. A short outlook will give an insight into the possible bondingmechanisms of the surface layer. These experiments were made with the mixed metal-oxide system yttrium-stabilized zirconium oxide, which is widely used as a substrate for superconducting oxides. A study of the structureof hydrated yttrium acetates, by single-crystal X-ray diffraction, infrared spectra, and elemental analysis demonstratesthat there are two separate structures for hydrated yttrium acetates, which play a role as an intermediate in thebuilding of ceramic oxide layers for coated conductors.