Paper Title:
Synthesis of YBa2Cu3O7-δ Using Oxalate Precursors and Sol-Gel Method
  Abstract

In this work we present the results about the preparation of the superconductor YBa2Cu3O7-δ (Y123) by sol-gel method using oxalate precursors. Samples were prepared by dissolving stoichiometric mixtures of Y(OOCCH3).4H2O, Ba(OOCCH3)2 and Cu(OOCCH3)2.H2O acetates in aqueous solution of oxalic acid, HCOO-COOH. The particulate sols obtained (2g.) were divided in two parts (1g. each one), from which the first one (sample A) was grinded, pellet, calcined (860°C) and sinterised at 860°C in oxidizing atmosphere, the second part (sample B) was grinded, pellet, calcined at 880°C and finally sinterized at 880°C in the same conditions, the XRD revels the superconductor Y123 is formed in the first sample, but coexisting with remarkable presence of the secondary phases: CuO, BaCu3O4, BaCO3 and BaCuO2, while in sample B the XRD reveals the obtention of high purity monophase Y123, the ac susceptibility measurement using a Quantum Design (SQUID) magnetometer indicates TC(onset)=92K for this sample, moreover the Rietveld refinement was done taking the orthorhombic Pmmm Y123 spatial group as a model, this suggest the cell´s parameters a=3.839Å, b=3.899 Å and c=11.702Å as reported in the literature. Therefore for the preparation of Y123-superconductor using oxalate precursors, the optimus sintering temperature is 880°C.

  Info
Periodical
Edited by
P. VINCENZINI and A. RIGAMONTI
Pages
37-42
DOI
10.4028/www.scientific.net/AST.47.37
Citation
A. Bustamante D., A. M. Osorio A., L. De Los Santos V., H. Carhuancho A., J.C. González G., G. R.C. Cernicchiario, J. A. Feijoo L., "Synthesis of YBa2Cu3O7-δ Using Oxalate Precursors and Sol-Gel Method", Advances in Science and Technology, Vol. 47, pp. 37-42, 2006
Online since
October 2006
Export
Price
$35.00
Share

In order to see related information, you need to Login.

In order to see related information, you need to Login.

Authors: Hua Jun Sun, Wen Chen, Qing Xu, Jing Zhou, Xiao Fang Liu
Abstract:Using Zr(NO3)4.5H2O as Zr source, PZT powder with a single-phase perovskite structure was synthesized by a sol-autocombustion method at a...
219
Authors: Sen Wang, Zhi Hui Li, Xin Liu, Huan Zhang
6 Functional Materials
Abstract:Anti–reducing effect of CaO in barium titanate based ceramic materials sintered at reducing atmosphere and the structure development of the...
2457
Authors: Yue Jun Chen, Zhi Fa Wang, Li Xue Yu, Jing Long Bu, Rong Lin Wang, Rui Sheng Wang
Ceramic
Abstract:Fused quartz granule (d50=0.019 mm) was used as raw material, nano-Y2O3 (size<0.08 μm) was used as...
1366
Authors: Yue Jun Chen, Zhi Fa Wang, Jing Long Bu, Li Xue Yu, Rong Lin Wang, Rui Sheng Wang
Chapter 1: Materials Properties
Abstract:Fused quartz powder (size<0.04mm) was used as raw material, nano-Y2O3, nano-CeO2 and...
1418
Authors: Nian Liu, Guo Dong Zhang, Jin Lu Wu, Jian Qiang Zhang, Fu Ju Zhang
Chapter 3: Metallurgical Technologies
Abstract:Ni3Al intermetallic compounds containing Cr was synthesized via Spark Plasma Sintering process. These Ni3Al...
1006