A new type of CO2 gas sensor based on capacitance changes

Tatsumi Ishihara; Kazuhiro Kometani; Yukako Mizuhara; Yusaka Takita

doi:10.1016/0925-4005(91)80227-B

A new type of CO₂ gas sensor based on capacitance changes

Tatsumi Ishihara, Kazuhiro Kometani, Yukako Mizuhara, Yusaka Takita

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38 Citations (Scopus)

Abstract

Mixed oxides consisting of BaTiO₃ and a metal oxide were studied as a new type of CO₂ gas sensor based on capacitance changes. Small changes in the capacitance of a metal oxide caused by carbonation are amplified by mixing with BaTiO₃, probably due to an enhancement of the barrier-layer capacitor. The CO₂ sensing characteristics of mixed-oxide capacitors depend strongly on the operating frequency as well as on the operating temperature. Among the compositions investigated in this study, CuOBaTiO₃ is the most sensitive to CO₂. The combination CuOBaTiO₃ selectively responds to carbon dioxide and can discriminate CO₂ concentrations from 100 to 20 000 ppm.

Original language	English
Pages (from-to)	97-102
Number of pages	6
Journal	Sensors and Actuators: B. Chemical
Volume	5
Issue number	1-4
DOIs	https://doi.org/10.1016/0925-4005(91)80227-B
Publication status	Published - Aug 1991
Externally published	Yes

All Science Journal Classification (ASJC) codes

Electronic, Optical and Magnetic Materials
Instrumentation
Condensed Matter Physics
Surfaces, Coatings and Films
Metals and Alloys
Electrical and Electronic Engineering
Materials Chemistry

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10.1016/0925-4005(91)80227-B

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title = "A new type of CO2 gas sensor based on capacitance changes",

abstract = "Mixed oxides consisting of BaTiO3 and a metal oxide were studied as a new type of CO2 gas sensor based on capacitance changes. Small changes in the capacitance of a metal oxide caused by carbonation are amplified by mixing with BaTiO3, probably due to an enhancement of the barrier-layer capacitor. The CO2 sensing characteristics of mixed-oxide capacitors depend strongly on the operating frequency as well as on the operating temperature. Among the compositions investigated in this study, CuOBaTiO3 is the most sensitive to CO2. The combination CuOBaTiO3 selectively responds to carbon dioxide and can discriminate CO2 concentrations from 100 to 20 000 ppm.",

author = "Tatsumi Ishihara and Kazuhiro Kometani and Yukako Mizuhara and Yusaka Takita",

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AU - Ishihara, Tatsumi

AU - Kometani, Kazuhiro

AU - Mizuhara, Yukako

AU - Takita, Yusaka

PY - 1991/8

Y1 - 1991/8

N2 - Mixed oxides consisting of BaTiO3 and a metal oxide were studied as a new type of CO2 gas sensor based on capacitance changes. Small changes in the capacitance of a metal oxide caused by carbonation are amplified by mixing with BaTiO3, probably due to an enhancement of the barrier-layer capacitor. The CO2 sensing characteristics of mixed-oxide capacitors depend strongly on the operating frequency as well as on the operating temperature. Among the compositions investigated in this study, CuOBaTiO3 is the most sensitive to CO2. The combination CuOBaTiO3 selectively responds to carbon dioxide and can discriminate CO2 concentrations from 100 to 20 000 ppm.

AB - Mixed oxides consisting of BaTiO3 and a metal oxide were studied as a new type of CO2 gas sensor based on capacitance changes. Small changes in the capacitance of a metal oxide caused by carbonation are amplified by mixing with BaTiO3, probably due to an enhancement of the barrier-layer capacitor. The CO2 sensing characteristics of mixed-oxide capacitors depend strongly on the operating frequency as well as on the operating temperature. Among the compositions investigated in this study, CuOBaTiO3 is the most sensitive to CO2. The combination CuOBaTiO3 selectively responds to carbon dioxide and can discriminate CO2 concentrations from 100 to 20 000 ppm.

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A new type of CO₂ gas sensor based on capacitance changes

Abstract

All Science Journal Classification (ASJC) codes

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