Formation of Tl0.85Cr0.15Sr2CaCu 2O7-δ superconductor from ultrafine co-precipitated powders

Imad Hamadneh, Yeong Wai Kuan, Lee Teik Hui, Roslan Abd. Shukor

Research output: Contribution to journalArticle

19 Citations (Scopus)

Abstract

The Tl0.85Cr0.15Sr2CaCu2O 7-δ superconductor has been successfully synthesized from ultrafine powders prepared via the co-precipitation method from nearly saturated solutions of metal acetates and 2-isopropanol solution of oxalic acid. The metal oxalates powders were calcined at 600 °C for 20 h. The calcined powders were pelletized and heated for 3, 4 and 5 min at 980 °C. The zero-resistance temperature, Tc-zero for samples heated at 3, 4 and 5 min is 88 K, 100 K and 92 K, respectively. XRD results showed the existence of tetragonal structure which belongs to the high-Tc 1212 phase. SEM micrographs showed ultrafine grains of about 1 μm or less for samples heated for 3 min. The grain size increases as the heating time is increased. These ultrafine powders can be useful in various applications such as starting material for high temperature superconductor tapes fabrication.

Original languageEnglish
Pages (from-to)734-736
Number of pages3
JournalMaterials Letters
Volume60
Issue number6
DOIs
Publication statusPublished - Mar 2006

Fingerprint

Powders
Superconducting materials
Oxalic Acid
Oxalic acid
Oxalates
2-Propanol
High temperature superconductors
Powder metals
Coprecipitation
Tapes
oxalic acid
Acetates
oxalates
Metals
high temperature superconductors
metals
tapes
Heating
Fabrication
acetates

Keywords

  • Co-precipitation
  • High temperature superconductor
  • Oxalic precursor
  • Ultrafine

ASJC Scopus subject areas

  • Materials Science(all)

Cite this

Formation of Tl0.85Cr0.15Sr2CaCu 2O7-δ superconductor from ultrafine co-precipitated powders. / Hamadneh, Imad; Kuan, Yeong Wai; Hui, Lee Teik; Abd. Shukor, Roslan.

In: Materials Letters, Vol. 60, No. 6, 03.2006, p. 734-736.

Research output: Contribution to journalArticle

Hamadneh, Imad ; Kuan, Yeong Wai ; Hui, Lee Teik ; Abd. Shukor, Roslan. / Formation of Tl0.85Cr0.15Sr2CaCu 2O7-δ superconductor from ultrafine co-precipitated powders. In: Materials Letters. 2006 ; Vol. 60, No. 6. pp. 734-736.
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