Synthesis of lanthanum cobaltite (LaCoO3) by the polymerizable complex route

Monica Popa, Masato Kakihana

Research output: Contribution to journalConference articlepeer-review

94 Citations (Scopus)

Abstract

We report a simple technique for preparation of lanthanum cobaltite LaCoO3 powders by the polymerizable complex (PC) method based on the Pechini-type reaction route. A mixed solution of citric acid (CA) and ethylene glycol (EG) with La and Co ions was polymerized. The final materials obtained by the polyesterification between CA and EG were compared with those obtained by the nonpolymerizable route using only CA as complexant, without EG. The formation mechanism, homogeneity and the structure of the obtained powders have been investigated by thermogravimetry, X-ray diffraction and scanning electron microscopy (SEM) measurements. X-ray diffraction results indicated the formation of LaCoO3 (rhombohedral) when the La-Co polymeric precursor was treated at 600 °C for 6 h. A better mixing of La and Co cations was achieved in the PC-derived precursor than in the precursor derived from the nonpolymerizable, amorphous citrate route.

Original languageEnglish
Pages (from-to)251-257
Number of pages7
JournalSolid State Ionics
Volume151
Issue number1-4
DOIs
Publication statusPublished - 2002 Nov 1
Externally publishedYes
EventSSP- 2000 - Tokyo, Japan
Duration: 2000 Dec 112000 Dec 13

Keywords

  • Amorphous citrate method
  • LaCoO
  • Perovskite oxide
  • Polymerizable complex technique

ASJC Scopus subject areas

  • Chemistry(all)
  • Materials Science(all)
  • Condensed Matter Physics

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