Study on the sensing mechanism of tin oxide flammable gas sensors using the Hall effect, J. Applied Physics, Vol. 69, No. 12, 8368 (1991)., Technical Paper Award, Japan Gas Association
Jan 2012
Basic and Applied Research and Development of Tin Oxide-based Semiconductor Gas Sensors, Seiyama Award, Japan Association of Chemical Sensors, The Electrochemical Society of Japan
The fundamental sensing mechanism of tin oxide semiconductor gas sensors was revealed by the model to clarify the electrical conduction mechanism and the reaction mechanism on the tin oxide surface. By utilizing of this knowledge, I have develope...
OTOSHI S, SASAKI H, OHNISHI H, HASE M, ISHIMARU K, IPPOMMATSU M, HIGUCHI T, MIYAYAMA M, YANAGIDA H
J Electrochem Soc 138(5) 1519-1523 May 1991 [Refereed]
Perovskite oxides Formula , [Formula and Formula , Formula ] containing A site defects were studied by thermal analysis, measuring of the temperature dependence of electrical conductivity (373–1273 K) and x‐ray diffraction. The results showed that...
Measurements were made on the Hall effect of SnO2 thin‐film inflammable gas sensors prepared by using the reactive sputtering method. The results revealed that when the electrical conductivity of the sensors changed with a change in the flammable ...
Studies in Surface Science and Catalysis Vol. 75, New Frontiers in Catalysis, Parts A-C, Proceedings of the 10th International Congress on Catalysis, 19-24 July, 1992, Budapest, Hungary 75(Pt B) 1891-1894 May 1993 [Refereed]
New Frontiers in Catalysis, Parts A-C
(Studies in Surface Science and Catalysis)
Series: Studies in Surface Science and Catalysis
Hardcover: 2890 pages
Publisher: Elsevier Science (May 4, 1993)
Language: English
ISBN-10: 044489621X
ISBN-13: 978-0...
Journal of the Ceramic Society of Japan 101(1175) 769-772 Jul 1993 [Refereed]
Thermal expansion characteristics of A-site deficient Sr-doped lanthanum chromites, La_<1-x>Sr_xCr_<1.01>O_<3-δ> (x=0.02, 0.03, 0.05, 0.10, 0.13, 0.15), have been studied in air and in a reducing atmosphere (log P_<o2>=-16) from room temperature t...
MORI Yusuke, YAGI Hiromasa, DEGUCHI Masahiro, SOGI Tadayuki, YOKOTA Yoshihiro, EIMORI Nobuhiro, YAGYU Hiroyuki, OHNISHI Hisao, KITABATAKE Makoto, NISHIMURA Kazuhito, HATTA Akimitsu, ITO Toshimichi, HIRAO Takashi, SASAKI Takatomo, HIRAKI Akio
Japanese journal of applied physics. Pt. 1, Regular papers & short notes 32(10) 4661-4668 Oct 1993 [Refereed]
The crystallinities and electrical properties of homoepitaxial diamond films grown from carbon monoxide have been investigated. The films were grown on high-pressure synthesized diamond (100) and (111) substrates by microwave plasma chemical vapor...
H. Ohnishi, H. Sasaki, T. Matsumoto, M. Ippommatsu
IGU/E7 94 Jun 1994 [Refereed]
19th World Gas Conference
= Détecteur de méthane de haute sensibilité
= 19e Congrès Mondial du Gaz 19. Congresso Mondiale del Gas: Milan 20/23 June 1994; E7: Highly sensitive methane senso
Gas sensing properties of SnO2 thin films with different microstructures fabricated by RF magnetron sputtering method were investigated over the temperature range 623–773 K, using the same concentration of H2 or CH4 containing dry air as test gase...
Highly selective NO detection using Bi2O3-based materials
K. Higaki, S. Kudo, H. Ohnishi
Electrochem. Solid-State Lett. 1 107 1998 [Refereed]
Electrochemical and Solid-State Letters 1(2) 107-109 Jun 1998 [Refereed]
We report that a notable sensitivity and remarkable selectivity for Formula , as compared to those for Formula and Formula , can be obtained in undoped Formula at temperatures below Formula on which Formula electrodes were formed. Formula doped wi...
K. Yokoyama, S. Tabata, H. Ohnishi, Y. Nishiuchi, M. Nakatani
Proc. 2001 International Gas Research Conference 137 1999 [Refereed]
Kinetic study of CH4+O2 reactions over SnO2 powder
Y. Nagasawa, K. Tabata, H. Ohnishi
Solid state chemical and biochemical sensors: proceedings of Topical Symposium IX-" Solid State Chemical and Biochemical Sensors" of the Forum on New Materials of the 9th CIMTEC-World Ceramics Congress and Forum on New Materials, Florence, Italy, June 14- 26 1999 [Refereed]
Selective detection of CO by copper oxide doped with alkali earth metals and Bi
K. Higaki, H. Ohnishi, O. Okada
Proc.9th Cimetic-World Forum on New Materials 269 1999 [Refereed]
Sens Actuators B Chem 109(2) 185-189 Sep 2005 [Refereed]
A micromachined gas sensor based on a catalytic thick film/SnO2 thin film bilayer and a thin film heater was investigated for CH4 sensing. The sensor demonstrated good sensitivity and high selectivity with low power consumption. The thin film heat...
Sens Actuators B Chem 109(2) 190-193 Sep 2005 [Refereed]
A micromachined gas sensor based on a catalytic thick film/SnO2 thin film bilayer and a thin film heater was investigated for CO sensing. The sensor demonstrated good sensitivity and high selectivity with low power consumption.
The thin film heate...
Measurement were made on the Hall effect of SnO2 thin film flammable gas sensors prepared by using the reactive sputtering method. The results revealed that when the electrical conductivity of the sensors changed with a change in the flammable gas...
7th International Conference on Surface and Colloid Science, Compiegne, France, 7–13 July 1991 7 Jul 1991 International Union of Pure and Applied Chemistry
Hisao OHNISHI, Hirokazu SASAKI, Takeshi MATSUMOTO and Masamichi IPPOMMATSU
13th Chemical Sensor Symposium 13 Oct 1991
The mechanisms of electric conduction and surface reaction on the SnO2 thin film gas sensors were resolved, and a quantiative model on the sensing mechanism was proposed. Electric conductivity of SnO2 is determined by only carrier electron density...
The External Magnetic Field Effect on the H2-O2 Reaction on the SnO2 Surface
H. Ohnishi, H. Sasaki and M. Ippommatsu
10th International Congress on Catalysis, 19-24 July, 1992, Budapest, Hungary 19 Jul 1992
Hisao OHNISHI, Shuzo KUDO, Takeshi MATSUMOTO and Masamichi IPPOMMATSU
15th Chemical Sensor Symposium 24 Sep 1992
We have developed high selectivity CH4 sensors based on SnO2 semiconductor thin films. The SnO2 thin films were deposited on sapphire substrate by the reactive RF magnetron sputtering method. And the gas selectivity was given by the laminating lay...
We have developed NO sensors made of Bi2Sr2(Ca1-yYy)Cu2Ox (y=0, 0.8) thin films. Bi2Sr2(Ca1-yYy)Cu2Ox (y=0, 0.8) thin films showed the high sensitivity at low concentrations of NO and also showed hardly any selectivity to H2, CO and CH4 which are ...
An energy supply system for supplying, in system interconnection, power received at a power receiving equipment from a power plant and power generated by a fuel cell to a power consuming installation, and supplying heat generated by the fuel cell ...
The invention relates to a fuel electrode for high-temperature solid electrolyte fuel cells and a process for manufacture of the electrode. The fuel electrode of the invention is a porous element composed of a high-melting metal, such as ruthenium...
The invention relates to a fuel electrode for high-temperature solid electrolyte fuel cells and a process for manufacture of the electrode. The fuel electrode of the invention is a porous element composed of a high-melting metal, such as ruthenium...
