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

doi:10.1016/S0925-4005(97)00177-9

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 journal › Article › peer-review

72 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 language	English (US)
Pages (from-to)	590-594
Number of pages	5
Journal	Sensors and Actuators, B: Chemical
Volume	44
Issue number	1-3
DOIs	https://doi.org/10.1016/S0925-4005(97)00177-9
State	Published - Oct 1997
Externally published	Yes

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

Access to Document

10.1016/S0925-4005(97)00177-9

Cite this

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

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.",

keywords = "Gas sensors, LaFeO, Nanosized, Thick film",

author = "Carotta, {Maria Cristina} and Butturi, {Maria Angela} and Giuliano Martinelli and Yoshihiko Sadaoka and Patrizia Nunziante and Enrico Traversa",

year = "1997",

month = oct,

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volume = "44",

pages = "590--594",

journal = "Sensors and Actuators, B: Chemical",

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T1 - Microstructural evolution of nanosized LaFeO3 powders from the thermal decomposition of a cyano-complex for thick film gas sensors

AU - Carotta, Maria Cristina

AU - Butturi, Maria Angela

AU - Martinelli, Giuliano

AU - Sadaoka, Yoshihiko

AU - Nunziante, Patrizia

AU - Traversa, Enrico

PY - 1997/10

Y1 - 1997/10

N2 - 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.

AB - 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.

KW - Gas sensors

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