Preparation and characterization of superconducting YBa2(Cu1−xCrx)4O8 oxides by thermal analysis

Autor:	Kaia Tõnsuaadu, Giedre Nenartaviciene, Aivaras Kareiva, Darius Jasaitis, Aldona Beganskiene
Rok vydání:	2007
Předmět:	Thermogravimetry Chromium Aqueous solution chemistry Metal ions in aqueous solution Differential thermal analysis Inorganic chemistry chemistry.chemical_element Physical and Theoretical Chemistry Condensed Matter Physics Thermal analysis Powder diffraction Sol-gel
Zdroj:	Journal of Thermal Analysis and Calorimetry. 90:173-178
ISSN:	1572-8943 1388-6150
DOI:	10.1007/s10973-006-7884-8
Popis:	In this study the formation of chromium substituted YBa2Cu4O8 (Y-124) superconductors has been investigated by TG/DTA measurements. The YBa2(Cu1−xCrx)4O8 ceramics with nominal compositions of x=0.01, 0.03, 0.05, 0.10 and 0.20 have been prepared by an aqueous sol-gel method using aqueous mixtures of the corresponding metal acetates and nitrates. Homogeneous precursor gels were obtained by complexing metal ions with tartaric acid. To assist the interpretation of the results obtained the synthesis products were additionally characterized by X-ray powder diffraction (XRD) and resistivity measurements. It was determined that doping the YBa2Cu4O8 phase with chromium has a strong effect on the phase purity and superconducting properties of the synthesis products.
Databáze:	OpenAIRE
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