Microstructural evolution of nanosized LaFeO3 powders from the thermal decomposition of a cyano-complex for thick film gas sensors

Maria Cristina Carotta, Maria Angela Butturi, Giuliano Martinelli*, Yoshihiko Sadaoka, Patrizia Nunziante, Enrico Traversa

*Corresponding author for this work

Research output: Contribution to journalArticlepeer-review

69 Scopus citations

Abstract

Nanosized, single-phase perovskite-type LaFeO3 powders are prepared by the thermal decomposition at 600°C of a hexacyanocomplex, La[Fe(CN)6].5H2O. The formation of LaFeO3 and its microstructural evolution with the temperature have been studied by simultaneous thermogravimetric and differential thermal analysis (TG/DTA), x-ray diffraction (XRD), scanning electron microscopy (SEM), and transmission electron microscopy (TEM). LaFeO3 is formed by the decomposition of the complex with a peculiar morphology, consisting of nanosized particles in soft agglomerates with the same size and shape of the complex grains. The nanosized particles are free of pores, making the powders suitable for application in thick film fabrication, after disruption of the agglomerates, for their use as active elements for gas sensors. Preliminary experiences are encouraging the use of this sensor for NO2 detection in the real environment.

Original languageEnglish (US)
Pages (from-to)590-594
Number of pages5
JournalSensors and Actuators, B: Chemical
Volume44
Issue number1-3
DOIs
StatePublished - Jan 1 1997

Keywords

  • Gas sensors
  • LaFeO
  • Nanosized
  • Thick film

ASJC Scopus subject areas

  • Electronic, Optical and Magnetic Materials
  • Instrumentation
  • Condensed Matter Physics
  • Surfaces, Coatings and Films
  • Metals and Alloys
  • Electrical and Electronic Engineering
  • Materials Chemistry

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