Abstract
The undoped n-type semiconductor CeO2 is a less studied but in many respects promising potential new sensor material. As in our former experiments (using different reactive gases) CeO2 proved to be a highly corrosion-resistant material, in this work detailed investigations have been carried out on its electrical and corrosion behaviour in a wide temperature range (300-800 °C) in oxygen- and SO2-containing atmospheres. Our most important results can be summarized as: (a) the resistance of CeO2 is practically uninfluenced either at 350 or 800 °C by SO2 if oxygen is present; (b) around these two temperatures no corrosive effect of SO2 can be observed either; (c) but at 550 °C in the presence of oxygen, the acceptor effect of SO2 can be observed; (d) at 550 °C during long-term heat treatment (100 h) in an SO2- and oxygen-containing atmosphere, the CeO2 in a thin surface layer transforms into CeO and the same time a reversible incorporation of a few percent of S into this layer can be observed. In the present work the connection between the sensitivity maximum for SO2 found at 550 °C in the presence of oxygen and a possible surface phase transformation is discussed.
| Original language | English |
|---|---|
| Pages (from-to) | 631-635 |
| Number of pages | 5 |
| Journal | Sensors and Actuators, B: Chemical |
| Volume | 25 |
| Issue number | 1-3 |
| DOIs | |
| Publication status | Published - 1995 |
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Keywords
- Cerium dioxide
- Sulfur dioxide sensors
ASJC Scopus subject areas
- Electrical and Electronic Engineering
- Electronic, Optical and Magnetic Materials
- Materials Chemistry
- Metals and Alloys
- Surfaces, Coatings and Films
- Condensed Matter Physics
- Instrumentation
- Analytical Chemistry
- Electrochemistry
Cite this
Study of the behaviour of CeO2 in SO2-containing environment. / Várhegyi, E. B.; Gerblinger, J.; Réti, F.; Perczel, I. V.; Meixner, H.
In: Sensors and Actuators, B: Chemical, Vol. 25, No. 1-3, 1995, p. 631-635.Research output: Contribution to journal › Article
}
TY - JOUR
T1 - Study of the behaviour of CeO2 in SO2-containing environment
AU - Várhegyi, E. B.
AU - Gerblinger, J.
AU - Réti, F.
AU - Perczel, I. V.
AU - Meixner, H.
PY - 1995
Y1 - 1995
N2 - The undoped n-type semiconductor CeO2 is a less studied but in many respects promising potential new sensor material. As in our former experiments (using different reactive gases) CeO2 proved to be a highly corrosion-resistant material, in this work detailed investigations have been carried out on its electrical and corrosion behaviour in a wide temperature range (300-800 °C) in oxygen- and SO2-containing atmospheres. Our most important results can be summarized as: (a) the resistance of CeO2 is practically uninfluenced either at 350 or 800 °C by SO2 if oxygen is present; (b) around these two temperatures no corrosive effect of SO2 can be observed either; (c) but at 550 °C in the presence of oxygen, the acceptor effect of SO2 can be observed; (d) at 550 °C during long-term heat treatment (100 h) in an SO2- and oxygen-containing atmosphere, the CeO2 in a thin surface layer transforms into CeO and the same time a reversible incorporation of a few percent of S into this layer can be observed. In the present work the connection between the sensitivity maximum for SO2 found at 550 °C in the presence of oxygen and a possible surface phase transformation is discussed.
AB - The undoped n-type semiconductor CeO2 is a less studied but in many respects promising potential new sensor material. As in our former experiments (using different reactive gases) CeO2 proved to be a highly corrosion-resistant material, in this work detailed investigations have been carried out on its electrical and corrosion behaviour in a wide temperature range (300-800 °C) in oxygen- and SO2-containing atmospheres. Our most important results can be summarized as: (a) the resistance of CeO2 is practically uninfluenced either at 350 or 800 °C by SO2 if oxygen is present; (b) around these two temperatures no corrosive effect of SO2 can be observed either; (c) but at 550 °C in the presence of oxygen, the acceptor effect of SO2 can be observed; (d) at 550 °C during long-term heat treatment (100 h) in an SO2- and oxygen-containing atmosphere, the CeO2 in a thin surface layer transforms into CeO and the same time a reversible incorporation of a few percent of S into this layer can be observed. In the present work the connection between the sensitivity maximum for SO2 found at 550 °C in the presence of oxygen and a possible surface phase transformation is discussed.
KW - Cerium dioxide
KW - Sulfur dioxide sensors
UR - http://www.scopus.com/inward/record.url?scp=0029288302&partnerID=8YFLogxK
UR - http://www.scopus.com/inward/citedby.url?scp=0029288302&partnerID=8YFLogxK
U2 - 10.1016/0925-4005(95)85139-9
DO - 10.1016/0925-4005(95)85139-9
M3 - Article
AN - SCOPUS:0029288302
VL - 25
SP - 631
EP - 635
JO - Sensors and Actuators, B: Chemical
JF - Sensors and Actuators, B: Chemical
SN - 0925-4005
IS - 1-3
ER -