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

被引：5
|
作者：
Nenartaviciene, G.
Tonsuaadu, K.
Jasaitis, D.
Beganskiene, A.
Kareiva, A.
机构：
[1] Vilnius State Univ, Dept Gen & Inorgan Chem, LT-03225 Vilnius, Lithuania
[2] Tallinn Univ Technol, Lab Inorgan Mat, EE-19086 Tallinn, Estonia
来源：
JOURNAL OF THERMAL ANALYSIS AND CALORIMETRY | 2007年 / 90卷 / 01期
关键词：
chromium substitution; sol-gel synthesis; TG; DTA; Y-124; superconductor;
D O I：
10.1007/s10973-006-7884-8
中图分类号：
O414.1 [热力学];
学科分类号：
摘要：
In this study the formation of chromium substituted YBa2Cu4O8 (Y-124) superconductors has been investigated by TG/DTA measurements. The YBa2(Cu1-xCrx)(4)O-8 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.
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收藏
页码：173 / 178
页数：6
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