Characterization and synthesis of Y0.9Ca0.1Ba1.8Sr0.2Cu 3O7-δ via combining sol-gel and solid-state route

L. M. Yeoh, Musa Ahmad

Research output: Contribution to journalArticle

2 Citations (Scopus)

Abstract

We applied the conventional sol-gel and solid-state reactions in this study to prepare double-substituted superconducting Y0.9Ca0.1Ba1.8Sr0.2Cu 3O7-δ. The result and the effect of calcium and strontium doping on high-Tc compound Y-123 have been investigated. The precursor gel Ca-Ba-Sr-Cu-O was prepared by acetate-tartrate sol-gel route which involved hydrolysis and olation (polycondensation). Y0.9Ca0.1Ba1.8Sr0.2Cu 3O7-δ was obtained by solid-state reaction between Y2O3 and Ca-Ba-Sr-Cu-O heated at 880 °C for 18 h with step cooling 50 °C/h until 450 °C. Without oxygen flow during the whole annealing process, the sample still showed good superconducting properties with Tc-zero close to 80 K. The presence of organic material in the sol-gel precursor Ca-Ba-Sr-Cu-O is nucleophile species, which is chemically reactive to Y2O3 during solid-state reaction thus enhance the diffusion rate. Moreover, -OH group in the precursor gel has ability to provide a sufficient amount of oxygen for the sample to stabilized the multicomponent superconductor.

Original languageEnglish
Pages (from-to)4012-4018
Number of pages7
JournalJournal of Non-Crystalline Solids
Volume354
Issue number33
DOIs
Publication statusPublished - 1 Sep 2008

Fingerprint

Solid state reactions
Sol-gels
routes
gels
solid state
synthesis
Gels
Oxygen
Nucleophiles
Strontium
Polycondensation
Superconducting materials
Calcium
Hydrolysis
Acetates
Doping (additives)
Annealing
nucleophiles
Cooling
oxygen

Keywords

  • Ceramics
  • FT-IR measurements
  • Sol-gels (xerogels)
  • Superconductors
  • X-ray diffraction

ASJC Scopus subject areas

  • Ceramics and Composites
  • Electronic, Optical and Magnetic Materials

Cite this

Characterization and synthesis of Y0.9Ca0.1Ba1.8Sr0.2Cu 3O7-δ via combining sol-gel and solid-state route. / Yeoh, L. M.; Ahmad, Musa.

In: Journal of Non-Crystalline Solids, Vol. 354, No. 33, 01.09.2008, p. 4012-4018.

Research output: Contribution to journalArticle

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AB - We applied the conventional sol-gel and solid-state reactions in this study to prepare double-substituted superconducting Y0.9Ca0.1Ba1.8Sr0.2Cu 3O7-δ. The result and the effect of calcium and strontium doping on high-Tc compound Y-123 have been investigated. The precursor gel Ca-Ba-Sr-Cu-O was prepared by acetate-tartrate sol-gel route which involved hydrolysis and olation (polycondensation). Y0.9Ca0.1Ba1.8Sr0.2Cu 3O7-δ was obtained by solid-state reaction between Y2O3 and Ca-Ba-Sr-Cu-O heated at 880 °C for 18 h with step cooling 50 °C/h until 450 °C. Without oxygen flow during the whole annealing process, the sample still showed good superconducting properties with Tc-zero close to 80 K. The presence of organic material in the sol-gel precursor Ca-Ba-Sr-Cu-O is nucleophile species, which is chemically reactive to Y2O3 during solid-state reaction thus enhance the diffusion rate. Moreover, -OH group in the precursor gel has ability to provide a sufficient amount of oxygen for the sample to stabilized the multicomponent superconductor.

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