Effect of calcium doping on LaCoO3 prepared by Pechini method

D. Arun Kumar, S. Selvasekarapandian, H. Nithya, Jarkko Leiro, Yoshitake Masuda, Sun Dong Kim, Sang Kuk Woo

Research output: Contribution to journalArticlepeer-review

18 Citations (Scopus)

Abstract

Calcium doped lanthanum cobaltite (La1-xCaxCoO3) (x=0, 0.2, 0.4, 0.6, 0.8) with different concentrations has been prepared by modified Pechini type polymerizable method. The X-ray diffraction pattern of the calcium doped samples shows the formation of perovskite material in cubic structure. Scanning electron and transmission electron microscopic analysis shows the porous nature of the prepared material. The appearance of peak at 347.5eV for calcium confirms its presence in the doped samples. Conductance spectra analysis reveals the frequency independent behavior of the samples and the conductivity is related with the particle size. The sample doped with 0.6% of calcium is found to show high conductivity. The temperature dependent conductivity indicates Arrhenius type behavior.

Original languageEnglish
Pages (from-to)140-147
Number of pages8
JournalPowder Technology
Volume235
DOIs
Publication statusPublished - 2013 Feb
Externally publishedYes

Keywords

  • Ceramics
  • Electrical characterization
  • Electrical conductivity
  • Sol-gel growth

ASJC Scopus subject areas

  • Chemical Engineering(all)

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