Mixed Oxide Capacitor of CuO—BaTiO3 as a New Type CO2 Gas Sensor

Tatsumi Ishihara, Kazuhiro Kometani, Yukako Mizuhara, Yusaku Takita

Research output: Contribution to journalArticle

90 Citations (Scopus)

Abstract

An oxide capacitor consisting of BaTiO3 and an oxide is studied as a new type CO2 sensor based on capacitance change. Sensitivity to CO2, as well as the optimum operating temperature, was strongly dependent on the particular oxide mixed with BaTiO3. Among the elements investigated in this study, CuO–BaTiO3 exhibited the highest sensitivity to CO2. In particular, the CuO–BaTiO3 mixed oxide at the equimolar composition is highly sensitive to CO2. The optimum operating temperature and frequency for CuO–BaTiO3 are 729 K and 100 Hz, respectively, and the 80% response time to 2% CO2 is within 25 s. The equimolar mixture of CuO and BaTiO3 can measure the CO2 concentration from 100 to 60 000 ppm. Carbonation of oxide seems to play a key role for the detection of CO2 on these mixed oxide capacitors. The optimum operating temperature of these mixed oxide capacitors for CO2 detection, therefore, correlates with the decomposition temperature of the carbonate corresponding to the oxide mixed with BaTiO3. The capacitance increase of CuO–BaTiO3 upon exposure to CO2 seems to result from the elevated height of the potential barrier at the grain boundary between CuO and BaTiO3. Carbonation of CuO in the element seems to bring about the elevation in the height of the potential barrier.

Original languageEnglish
Pages (from-to)613-618
Number of pages6
JournalJournal of the American Ceramic Society
Volume75
Issue number3
DOIs
Publication statusPublished - Jan 1 1992
Externally publishedYes

Fingerprint

Chemical sensors
Oxides
Capacitors
Carbonation
Capacitance
Temperature
Carbonates
Grain boundaries
Decomposition
Sensors
Chemical analysis

All Science Journal Classification (ASJC) codes

  • Ceramics and Composites
  • Materials Chemistry

Cite this

Mixed Oxide Capacitor of CuO—BaTiO3 as a New Type CO2 Gas Sensor. / Ishihara, Tatsumi; Kometani, Kazuhiro; Mizuhara, Yukako; Takita, Yusaku.

In: Journal of the American Ceramic Society, Vol. 75, No. 3, 01.01.1992, p. 613-618.

Research output: Contribution to journalArticle

Ishihara, Tatsumi ; Kometani, Kazuhiro ; Mizuhara, Yukako ; Takita, Yusaku. / Mixed Oxide Capacitor of CuO—BaTiO3 as a New Type CO2 Gas Sensor. In: Journal of the American Ceramic Society. 1992 ; Vol. 75, No. 3. pp. 613-618.
@article{ac0769a88e0b4e30909527bea15bfd1b,
title = "Mixed Oxide Capacitor of CuO—BaTiO3 as a New Type CO2 Gas Sensor",
abstract = "An oxide capacitor consisting of BaTiO3 and an oxide is studied as a new type CO2 sensor based on capacitance change. Sensitivity to CO2, as well as the optimum operating temperature, was strongly dependent on the particular oxide mixed with BaTiO3. Among the elements investigated in this study, CuO–BaTiO3 exhibited the highest sensitivity to CO2. In particular, the CuO–BaTiO3 mixed oxide at the equimolar composition is highly sensitive to CO2. The optimum operating temperature and frequency for CuO–BaTiO3 are 729 K and 100 Hz, respectively, and the 80{\%} response time to 2{\%} CO2 is within 25 s. The equimolar mixture of CuO and BaTiO3 can measure the CO2 concentration from 100 to 60 000 ppm. Carbonation of oxide seems to play a key role for the detection of CO2 on these mixed oxide capacitors. The optimum operating temperature of these mixed oxide capacitors for CO2 detection, therefore, correlates with the decomposition temperature of the carbonate corresponding to the oxide mixed with BaTiO3. The capacitance increase of CuO–BaTiO3 upon exposure to CO2 seems to result from the elevated height of the potential barrier at the grain boundary between CuO and BaTiO3. Carbonation of CuO in the element seems to bring about the elevation in the height of the potential barrier.",
author = "Tatsumi Ishihara and Kazuhiro Kometani and Yukako Mizuhara and Yusaku Takita",
year = "1992",
month = "1",
day = "1",
doi = "10.1111/j.1151-2916.1992.tb07850.x",
language = "English",
volume = "75",
pages = "613--618",
journal = "Journal of the American Ceramic Society",
issn = "0002-7820",
publisher = "Wiley-Blackwell",
number = "3",

}

TY - JOUR

T1 - Mixed Oxide Capacitor of CuO—BaTiO3 as a New Type CO2 Gas Sensor

AU - Ishihara, Tatsumi

AU - Kometani, Kazuhiro

AU - Mizuhara, Yukako

AU - Takita, Yusaku

PY - 1992/1/1

Y1 - 1992/1/1

N2 - An oxide capacitor consisting of BaTiO3 and an oxide is studied as a new type CO2 sensor based on capacitance change. Sensitivity to CO2, as well as the optimum operating temperature, was strongly dependent on the particular oxide mixed with BaTiO3. Among the elements investigated in this study, CuO–BaTiO3 exhibited the highest sensitivity to CO2. In particular, the CuO–BaTiO3 mixed oxide at the equimolar composition is highly sensitive to CO2. The optimum operating temperature and frequency for CuO–BaTiO3 are 729 K and 100 Hz, respectively, and the 80% response time to 2% CO2 is within 25 s. The equimolar mixture of CuO and BaTiO3 can measure the CO2 concentration from 100 to 60 000 ppm. Carbonation of oxide seems to play a key role for the detection of CO2 on these mixed oxide capacitors. The optimum operating temperature of these mixed oxide capacitors for CO2 detection, therefore, correlates with the decomposition temperature of the carbonate corresponding to the oxide mixed with BaTiO3. The capacitance increase of CuO–BaTiO3 upon exposure to CO2 seems to result from the elevated height of the potential barrier at the grain boundary between CuO and BaTiO3. Carbonation of CuO in the element seems to bring about the elevation in the height of the potential barrier.

AB - An oxide capacitor consisting of BaTiO3 and an oxide is studied as a new type CO2 sensor based on capacitance change. Sensitivity to CO2, as well as the optimum operating temperature, was strongly dependent on the particular oxide mixed with BaTiO3. Among the elements investigated in this study, CuO–BaTiO3 exhibited the highest sensitivity to CO2. In particular, the CuO–BaTiO3 mixed oxide at the equimolar composition is highly sensitive to CO2. The optimum operating temperature and frequency for CuO–BaTiO3 are 729 K and 100 Hz, respectively, and the 80% response time to 2% CO2 is within 25 s. The equimolar mixture of CuO and BaTiO3 can measure the CO2 concentration from 100 to 60 000 ppm. Carbonation of oxide seems to play a key role for the detection of CO2 on these mixed oxide capacitors. The optimum operating temperature of these mixed oxide capacitors for CO2 detection, therefore, correlates with the decomposition temperature of the carbonate corresponding to the oxide mixed with BaTiO3. The capacitance increase of CuO–BaTiO3 upon exposure to CO2 seems to result from the elevated height of the potential barrier at the grain boundary between CuO and BaTiO3. Carbonation of CuO in the element seems to bring about the elevation in the height of the potential barrier.

UR - http://www.scopus.com/inward/record.url?scp=84985053271&partnerID=8YFLogxK

UR - http://www.scopus.com/inward/citedby.url?scp=84985053271&partnerID=8YFLogxK

U2 - 10.1111/j.1151-2916.1992.tb07850.x

DO - 10.1111/j.1151-2916.1992.tb07850.x

M3 - Article

AN - SCOPUS:84985053271

VL - 75

SP - 613

EP - 618

JO - Journal of the American Ceramic Society

JF - Journal of the American Ceramic Society

SN - 0002-7820

IS - 3

ER -