Measurement and regulation of oxygen content in gases using solid electrolyte cells. III. Oxygen pump-gauge

Fouletier, J.; Vitter, G.; Kleitz, M.

doi:10.1007/bf00613213

Cited by 78 publications

(33 citation statements)

References 8 publications

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“…In order to control oxygen partial pressures, a YSZ based oxygen pump and a potentiometric sensor (gauge) were used [15]. The pump was used to electrochemically inject oxygen in an inert Ar carrier gas (H 2 O < 3 ppm and O 2 < 2 ppm …”

Section: Methodsmentioning

confidence: 99%

Humidity Related Low Temperature Conductivity Hysteresis of Ce_1–_xZr_xO₂ (0 ≤ x ≤ 1) Ceramics. Structural Disorder Relationship

et al. 2011

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Ion‐electron mixed conductivity of the Ce1–xZrxO2 (0 < x < 1) series, prepared by solid‐state reaction, has been measured as a function of temperature, pO2 and pH2O relative pressures. The structural analysis of this series shows the formation of monoclinic, tetragonal, and cubic phases as the Ce content increases. The temperature used in samples preparation, 1,923 K, favors at intermediate compositions the homogeneous Ce and Zr mixing in the metastable tetragonal t′ phase. The variation of conductivity with the relative oxygen pressure indicates that electronic contribution increases, becoming preponderant, as the Ce‐content increases. The modifications in conductivity observed in Ce‐rich samples have been ascribed to the enhancement of the electronic contribution at the grain‐boundary of ceramics. The differences observed at low temperatures in electronic dc‐conductivity of Ce‐rich samples during heating and cooling treatments, have been ascribed to the incorporation of water as hydroxide defects at the grain boundary and interior of the particles. The surface hydroxylation is maximal in samples with improved OSC capacity, decreasing drastically in samples heated at 740 K. Finally, the potential application of prepared materials in intermediate temperature solid oxide fuel cells (SOFC) is discussed.

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Section: Methodsmentioning

confidence: 99%

Humidity Related Low Temperature Conductivity Hysteresis of Ce_1–_xZr_xO₂ (0 ≤ x ≤ 1) Ceramics. Structural Disorder Relationship

et al. 2011

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“…Since oxygen leakage is expected, the oxygen partial pressure in the reference chamber after reduction might be only slightly lower and the efficiency of the redox process is about the same before and after the reduction process. The possible leakage sources were discussed by Kaneko et al [17], Maskell [8] and Fouletier [18], however, in case of structure D it is evident that the leakage is due to the crack in the electrolyte. Fig.…”

Section: Amentioning

confidence: 98%

Potentiometric Oxygen Sensor with Solid State Reference Electrode

Dunst¹,

Jasiński²,

Jasiński³

2014

Metrology and Measurement Systems

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The concentration or the partial pressure of oxygen in an environment can be determined using different measuring principles. For high temperature measurements of oxygen, ceramic-based sensors are the most practical. They are simple in construction, exploration and maintenance. A typical oxygen potentiometric sensor consists of an oxygen ion conducting solid electrolyte and two electrodes deposited on the two sides of the electrolyte. In this paper different structures of potentiometric oxygen sensors with a solid state reference electrode were fabricated and investigated. The fabricated structures consisted of oxygen ion conducting solid electrolyte from yttria stabilized zirconia, a sensing platinum electrode and nickel-nickel oxide reference electrode. The mixture of nickel-nickel oxide was selected as the reference electrode because it provides reliable electrochemical potential in contact with oxygen conducting electrolyte. To avoid oxidation of nickel the reference electrode is sealed from ambient and the mixture of nickel-nickel oxide was formed electrochemically from nickel oxide after sealing. The effectiveness of the sealing quality and the effectiveness of nickel-nickel oxide mixture formation was investigated by impedance spectroscopy.

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“…A bomba eletroquímica de oxigênio é um dispositivo que permite a introdução ou a extração de oxigênio em um gás ou uma atmosfera [5]. O dispositivo é constituído de um tubo de zircônia estabilizada com ítria, no qual foram depositadas camadas de platina nas superfícies interna e externa (Fig.…”

Section: Bomba Eletroquímica De Oxigêniounclassified

Montagem, calibração e testes de um sistema de medidas elétricas em função da temperatura e da pressão parcial de oxigênio

Steil¹,

Fonseca

França

et al. 2002

Cerâmica

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ResumoNeste trabalho são descritas a montagem e a calibração de um sistema de medidas elétricas com o controle da pressão parcial de oxigênio. Este sistema permite a realização de medidas elétricas desde a temperatura ambiente até 1000 °C em ampla faixa de pressões parciais de oxigênio entre 10 -6 e 1 atm. O sistema utiliza as propriedades eletroquímicas dos eletrólitos sólidos à base de zircônia estabilizada para produzir e detectar pressões parciais de oxigênio com boa precisão.As calibrações e testes realizados, compreendendo a verificação das leis de Nernst e de Faraday, evidenciaram o bom funcionamento dos dispositivos construídos. A montagem apresentada neste trabalho, utilizada em conjunto com um sistema de medidas de espectroscopia de impedância, permite a realização de diversos estudos acerca das propriedades elétricas de materiais. Também são apresentados neste trabalho dois exemplos destes estudos, que consistem na investigação das propriedades elétricas de eletrólitos sólidos à base de zircônia e de varistores à base de óxido de estanho. Palavras-chave: propriedades elétricas, espectroscopia de impedância, dependência com O , eletrólitos sólidos, varistores. AbstractThe set-up and calibration of a system for electrical measurements under controlled oxygen partial pressure is described. The system allows for the electrical characterization of materials from room temperature to 1000 ºC over a wide range of oxygen partial pressures ranging from 10 -6 to 1 atm.

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Measurement and regulation of oxygen content in gases using solid electrolyte cells. III. Oxygen pump-gauge

Cited by 78 publications

References 8 publications

Humidity Related Low Temperature Conductivity Hysteresis of Ce_1–_xZr_xO₂ (0 ≤ x ≤ 1) Ceramics. Structural Disorder Relationship

Humidity Related Low Temperature Conductivity Hysteresis of Ce_1–_xZr_xO₂ (0 ≤ x ≤ 1) Ceramics. Structural Disorder Relationship

Potentiometric Oxygen Sensor with Solid State Reference Electrode

Montagem, calibração e testes de um sistema de medidas elétricas em função da temperatura e da pressão parcial de oxigênio

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Measurement and regulation of oxygen content in gases using solid electrolyte cells. III. Oxygen pump-gauge

Cited by 78 publications

References 8 publications

Humidity Related Low Temperature Conductivity Hysteresis of Ce1–xZrxO2 (0 ≤ x ≤ 1) Ceramics. Structural Disorder Relationship

Humidity Related Low Temperature Conductivity Hysteresis of Ce1–xZrxO2 (0 ≤ x ≤ 1) Ceramics. Structural Disorder Relationship

Potentiometric Oxygen Sensor with Solid State Reference Electrode

Montagem, calibração e testes de um sistema de medidas elétricas em função da temperatura e da pressão parcial de oxigênio

Contact Info

Product

Resources

About

Humidity Related Low Temperature Conductivity Hysteresis of Ce_1–_xZr_xO₂ (0 ≤ x ≤ 1) Ceramics. Structural Disorder Relationship

Humidity Related Low Temperature Conductivity Hysteresis of Ce_1–_xZr_xO₂ (0 ≤ x ≤ 1) Ceramics. Structural Disorder Relationship