A Fe2O3 - SnO2 based gas sensors for ethanol

O. K. Tan; W. Zhu; K. Yao; G. S. Toh; S. Y. Teh; J. Z. Jiang

A Fe₂O₃ - SnO₂ based gas sensors for ethanol

O. K. Tan^*, W. Zhu, K. Yao, G. S. Toh, S. Y. Teh, J. Z. Jiang

^*Corresponding author for this work

Research output: Contribution to conference › Paper › peer-review

Abstract

Very good gas sensitivity to ethanol gas has been observed in a Fe₂O₃ - SnO₂ based gas sensor. The oxide semiconductor materials used have a composition of 6.4mol % SnO₂ prepared by high energy ball milling for 110 h. To achieve good electrical contact, inter-digitized gold electrodes are used. The ratio of the electrical resistance of the sample in air R_air to that in gases R_gas. (S = R_air/R_gas) gives the gas sensitivity, is measured with a custom-fabricated, computer controlled gas sensor measurement system. A systematic characterization is carried out to study the effect of operating temperature in the range of 200°C to 400°C under different gas concentration. Three different annealing temperatures of 500°C, 600°C and 700°C are used to prepare the samples. The sensitivity obtained for 500-ppm ethanol gas is quite remarkable at 35 for the sample annealed at 500°C operating at 300°C. The gas sensing mechanism and its relationship with processing parameters are discussed.

Original language	English
Pages	449-451
Number of pages	3
Publication status	Published - 1997
Externally published	Yes
Event	7th International Symposium on IC Technology, Systems and Applications ISIC 97 - Singapore, Singapore Duration: Sept 10 1997 → Sept 12 1997

Conference

Conference	7th International Symposium on IC Technology, Systems and Applications ISIC 97
Country/Territory	Singapore
City	Singapore
Period	9/10/97 → 9/12/97

ASJC Scopus Subject Areas

Electronic, Optical and Magnetic Materials
Electrical and Electronic Engineering

Cite this

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title = "A Fe2O3 - SnO2 based gas sensors for ethanol",

abstract = "Very good gas sensitivity to ethanol gas has been observed in a Fe2O3 - SnO2 based gas sensor. The oxide semiconductor materials used have a composition of 6.4mol % SnO2 prepared by high energy ball milling for 110 h. To achieve good electrical contact, inter-digitized gold electrodes are used. The ratio of the electrical resistance of the sample in air Rair to that in gases Rgas. (S = Rair/Rgas) gives the gas sensitivity, is measured with a custom-fabricated, computer controlled gas sensor measurement system. A systematic characterization is carried out to study the effect of operating temperature in the range of 200°C to 400°C under different gas concentration. Three different annealing temperatures of 500°C, 600°C and 700°C are used to prepare the samples. The sensitivity obtained for 500-ppm ethanol gas is quite remarkable at 35 for the sample annealed at 500°C operating at 300°C. The gas sensing mechanism and its relationship with processing parameters are discussed.",

author = "Tan, {O. K.} and W. Zhu and K. Yao and Toh, {G. S.} and Teh, {S. Y.} and Jiang, {J. Z.}",

year = "1997",

language = "English",

pages = "449--451",

note = "7th International Symposium on IC Technology, Systems and Applications ISIC 97 ; Conference date: 10-09-1997 Through 12-09-1997",

}

TY - CONF

T1 - A Fe2O3 - SnO2 based gas sensors for ethanol

AU - Tan, O. K.

AU - Zhu, W.

AU - Yao, K.

AU - Toh, G. S.

AU - Teh, S. Y.

AU - Jiang, J. Z.

PY - 1997

Y1 - 1997

N2 - Very good gas sensitivity to ethanol gas has been observed in a Fe2O3 - SnO2 based gas sensor. The oxide semiconductor materials used have a composition of 6.4mol % SnO2 prepared by high energy ball milling for 110 h. To achieve good electrical contact, inter-digitized gold electrodes are used. The ratio of the electrical resistance of the sample in air Rair to that in gases Rgas. (S = Rair/Rgas) gives the gas sensitivity, is measured with a custom-fabricated, computer controlled gas sensor measurement system. A systematic characterization is carried out to study the effect of operating temperature in the range of 200°C to 400°C under different gas concentration. Three different annealing temperatures of 500°C, 600°C and 700°C are used to prepare the samples. The sensitivity obtained for 500-ppm ethanol gas is quite remarkable at 35 for the sample annealed at 500°C operating at 300°C. The gas sensing mechanism and its relationship with processing parameters are discussed.

AB - Very good gas sensitivity to ethanol gas has been observed in a Fe2O3 - SnO2 based gas sensor. The oxide semiconductor materials used have a composition of 6.4mol % SnO2 prepared by high energy ball milling for 110 h. To achieve good electrical contact, inter-digitized gold electrodes are used. The ratio of the electrical resistance of the sample in air Rair to that in gases Rgas. (S = Rair/Rgas) gives the gas sensitivity, is measured with a custom-fabricated, computer controlled gas sensor measurement system. A systematic characterization is carried out to study the effect of operating temperature in the range of 200°C to 400°C under different gas concentration. Three different annealing temperatures of 500°C, 600°C and 700°C are used to prepare the samples. The sensitivity obtained for 500-ppm ethanol gas is quite remarkable at 35 for the sample annealed at 500°C operating at 300°C. The gas sensing mechanism and its relationship with processing parameters are discussed.

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M3 - Paper

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T2 - 7th International Symposium on IC Technology, Systems and Applications ISIC 97

Y2 - 10 September 1997 through 12 September 1997

ER -

A Fe₂O₃ - SnO₂ based gas sensors for ethanol

Abstract

Conference

ASJC Scopus Subject Areas

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