Synthesis, characterizations and gas sensing properties of nanocrystalline In2O3 thick film sensor

Author

Bari, R.H. ; Jain, Gotan H. ; Chavan, D.N.

Author_Institution

Dept. of Phys., KRN Commerce & MD Sci. Coll., Jamner, India

fYear

2011

fDate

Nov. 28 2011-Dec. 1 2011

Firstpage

273

Lastpage

277

Abstract

The nanocrystalline powder of In₂O₃ with cubic structure prepared by a simple hydrothermal decomposition route. The structure and crystal phase of the powder was characterized by X-ray diffraction (XRD), microstructure by Transmission Electron Microscopy (TEM). The results indicated that the indium oxide was cubic with range size 28.5- 65.8 nm. Gas sensing properties of the nanocrystalline In₂O₃ thick film sensor were tested for various gases in air at static state. The tested results showed that the sensor based on In₂O₃ nanocrystals exhibited high response towards H₂S gas (40 ppm) at an operating temperature 100°C. The selectivity of the sensor elements for H₂S gas against different gases was studied. The results on response and recovery time were also discussed.

Keywords

X-ray diffraction; gas sensors; indium compounds; nanoparticles; nanosensors; thick film sensors; transmission electron microscopy; In₂O₃; TEM; X-ray diffraction; XRD; crystal phase; crystalline thick film sensor; cubic structure; gas sensing properties; hydrothermal decomposition route; nanocrystalline powder; nanocrystals; size 28.5 nm to 65.8 nm; structure phase; temperature 100 degC; transmission electron microscopy; Actuators; Gas detectors; Materials; Powders; Resistance; Temperature sensors; H2S gas sensor; nanocrystalline In2O3; response time; selectivity; sensitivity;

fLanguage

English

Publisher

ieee

Conference_Titel

Sensing Technology (ICST), 2011 Fifth International Conference on

Conference_Location

Palmerston North

ISSN

2156-8065

Print_ISBN

978-1-4577-0168-9

Type

conf

DOI

10.1109/ICSensT.2011.6136980

Filename

6136980