Preparation and transport properties of aqueous sol-gel synthesized NaCo2O4-δ

Chia-Jyi Liu, J. Y. Liao, T. W. Wu, B. Y. Jen

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16 Citations (Scopus)


We have successfully prepared thermoelectric materials NaCo 2O4-δ at lower temperature (700°C) using aqueous sol-gel methods. We find that the electrical resistivity and thermopower of NaCo2O4-δ depend strongly on the sintering temperature and partial pressure of oxygen. The oxygen content of NaCo 2O4-δ is found to decrease with increasing sintering temperature. The sample prepared at the combination of 700°C and pure flowing oxygen exhibits the highest value of power factor.

Original languageEnglish
Pages (from-to)4569-4573
Number of pages5
JournalJournal of Materials Science
Issue number14
Publication statusPublished - 2004 Jul 15

All Science Journal Classification (ASJC) codes

  • Materials Science(all)
  • Mechanics of Materials
  • Mechanical Engineering

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