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Structural Changes on SnO2 Nanoparticles for Gas Sensor Applications induced by Calcination Treatments and Grinding

Published online by Cambridge University Press:  10 February 2011

A. Diéguez ,
J. L. Alay ,
J. Kappler ,
A. Romano-Rodríguez ,
A. Vilà ,
N. Bârsan ,
U. Weimar ,
W. Göpel  and
J. R. Morante
A. Diéguez
Affiliation:
EME, Electronic Materials and Engineering, Department of Electronics, University of Barcelona, Avda. Diagonal 645-647, E-08028 Barcelna. Spain
J. L. Alay
Affiliation:
EME, Electronic Materials and Engineering, Department of Electronics, University of Barcelona, Avda. Diagonal 645-647, E-08028 Barcelna. Spain
J. Kappler
Affiliation:
IPC, Center of Interface Analysis of Senior of University of Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen. Germany.
A. Romano-Rodríguez
Affiliation:
EME, Electronic Materials and Engineering, Department of Electronics, University of Barcelona, Avda. Diagonal 645-647, E-08028 Barcelna. Spain
A. Vilà
Affiliation:
EME, Electronic Materials and Engineering, Department of Electronics, University of Barcelona, Avda. Diagonal 645-647, E-08028 Barcelna. Spain
N. Bârsan
Affiliation:
IPC, Center of Interface Analysis of Senior of University of Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen. Germany.
U. Weimar
Affiliation:
IPC, Center of Interface Analysis of Senior of University of Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen. Germany.
W. Göpel
Affiliation:
IPC, Center of Interface Analysis of Senior of University of Tübingen, Auf der Morgenstelle 8, D-72076 Tübingen. Germany.
J. R. Morante
Affiliation:
EME, Electronic Materials and Engineering, Department of Electronics, University of Barcelona, Avda. Diagonal 645-647, E-08028 Barcelna. Spain
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Abstract

Starting with a hydrated tin dioxide powder of 3nm size obtained by the sol-gel method, the effects of thermal treatments and grinding on the final structural properties of the nanoparticles have been investigated. It is observed that two regions with different structural properties can be distinguished in the range of temperatures between 250 and 1000°C. In spite of their large grain size (>15nm), above 350–450°C, these nanocrystals can be used as precursor powders for gas sensors because of their higher stability. Grinding of the starting material before calcination will be proved as a suitable method to obtain the sarne type of stability with lower grain size.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 501: Symposium FF – Surface Controlled Nanoscale Materials for High-Added… , 1997 , 53
Copyright
Copyright © Materials Research Society 1998

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References

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