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Gas-Sensitive Properties of Fe2O3 Nanoparticles Prepared by Laser-Induced Vapor-Phase Reaction

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Abstract:

Iron oxide nanoparticles have been synthesized by laser-induced vapor-phase reaction. Mean diameter of the particles varied from approximate 4 nm to 40 nm and the crystalline phase was transited from γ-Fe2O3 to α-Fe2O3 with increasing operation temperature. The nanometer-sized α-Fe2O3 powders were used to fabricate a thick film based gas-sensitive sensor. The effects of the doped noble metals or carbonate and the calcination temperature on sensitivity of the sensor were studied. The results show that the α-Fe2O3 was doped with 3% noble metal or SrCO3 presents the best sensitivity to CO.

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Periodical:

Solid State Phenomena (Volumes 121-123)

Pages:

61-64

DOI:

https://doi.org/10.4028/www.scientific.net/SSP.121-123.61

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Online since:

March 2007

Authors:

Guang Sheng Guo, Ying Wang, Wen Ren, Fu Bo Gu, Hong You Guo

Keywords:

Gas- Sensitive Properties, Laser Chemistry, Nanometer Sized Fe2O3

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© 2007 Trans Tech Publications Ltd. All Rights Reserved

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