Low-Field Nuclear Magnetic Resonance Relaxometry as a Tool in Monitoring the Aging of Coating Solutions (Case Study: Barium Propionate Precursor Coating Solution)
| Autor: | R.B. Mos, L. Ciontea, Ioan Ardelean, Codruta Badea |
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| Rok vydání: | 2010 |
| Předmět: |
Barium acetate
Relaxometry Inorganic chemistry Relaxation (NMR) Analytical chemistry Oxide chemistry.chemical_element Barium engineering.material Low field nuclear magnetic resonance Atomic and Molecular Physics and Optics chemistry.chemical_compound chemistry Coating engineering Dispersion (chemistry) |
| Zdroj: | Applied Magnetic Resonance. 39:365-372 |
| ISSN: | 1613-7507 0937-9347 |
| Popis: | In the present study, we investigate the relationship between the aging of a barium coating solution used in the synthesis of the precursors for YBa2Cu3O7−x -coated conductors or any oxide compound containing BaO and the transverse relaxation time measured in a nuclear magnetic resonance (NMR) experiment. The barium propionate precursor solution sample was prepared by the stepwise addition of an excess of propionic acid and ammonia to a barium acetate dispersion in methanol. All NMR relaxation experiments were performed at 20°C and a proton resonance frequency of 20 MHz. The experimental results are compared with a proposed model that assumes the reduction of the relaxation centers during the aging process. The model allows us the extraction of a characteristic aging time for the monitored sample. |
| Databáze: | OpenAIRE |
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