Gas Polarographic Oxygen Sensor Using an Oxygen/Zirconia Electrolyte

Usui, Toshio; Asada, Akiyoshi; Nakazawa, Mitsuhiro; Osanai, Hiroshi

doi:10.1149/1.2096676

Cited by 86 publications

(27 citation statements)

References 17 publications

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“…The seal between the ceramic discs is achieved using a screen-printed ring (Fig. 8) made of powdered glass paste [11], [33], [34]. The important considerations when choosing the composition of the glass are its thermal expansion coefficient (to match that of the electrolyte) and its softening/melting temperature (to be significantly above the operating temperature of the sensor).…”

Section: Devices With Glass Sealmentioning

confidence: 99%

Design and Assembly of Miniature Zirconia Oxygen Sensors

Benammar

2004

IEEE Sensors J.

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Zirconia oxygen sensors are highly selective solid-state devices used for many applications, including combustion control for better fuel economy and lower emissions. Stabilized zirconia electrolyte meets the device requirements of adequate ionic conductivity at elevated temperature, chemical stability, and suitable mechanical properties. The device is assembled such that one or two enclosed volumes are obtained. It may be operated in a number of modes: some require the internal volume to be sealed fully, and others necessitate the provision of a diffusion barrier, usually a small hole (30-100 m in diameter), to connect the internal volume with the external sample gas. The design and fabrication of these devices must meet the practical requirements of their modes of operation. The choice of the dimensions of the sensor, its materials and their processing is critical in making a reliable device; these details are scarce in the literature. The paper gives a detailed description of the design and assembly of these sensors from pre-conditioned components.Index Terms-Amperometric sensor, sensor assembly, sensor design, sensor fabrication, zirconia oxygen sensors, zirconia pump-gauge.

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Section: Devices With Glass Sealmentioning

confidence: 99%

Design and Assembly of Miniature Zirconia Oxygen Sensors

Benammar

2004

IEEE Sensors J.

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“…Thus, the current results in oscillation of the oxygen partial pressure within the internal volume. The presence of the hole linking the internal volume to the external atmosphere implies that oxygen transport via this path occurs through diffusion and flow [8], [9]. However, for the practical low oxygen concentrations (say below 7%) in the flue of combustion systems, diffusion is the principal transport process and flow may be neglected.…”

Section: A Sensor Operated In the Lean Regionmentioning

confidence: 99%

Theory and simulation of a miniature zirconia sensor for control of the air-to-fuel ratio in combustion systems

Benammar

Maskell

2001

IEEE Sensors J.

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The theory of operation on both sides of stoichiometry of a miniature zirconia oxygen pump-gauge incorporating a diffusion hole is discussed. Computer simulation of the sensor output when used for monitoring the air-to-fuel ratio in a combustion system burning pure methane in air is given. It is shown that for a sinusoidal current applied to the pump, the gauge provides an oscillating EMF from which the air-to-fuel ratio may be determined unambiguously without the use of a reference and/or pseudo-reference.Index Terms-Air-to-fuel ratio control, air-to-fuel ratio sensors, combustion systems, lambda sensor, oxygen sensor, sensor simulation, sensor theory, zirconia sensor.

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“…The latter present several advantages compared to the former in cases 3 where there are difficulties with the establishment of a reference atmosphere and where the Nernst potential for an analyzed gas component does not exist. At the first stage, the amperometric sensors with diffusion barriers for analysis of gas mixtures with medium and high oxygen concentrations were widely studied [14][15][16]. Another example is an YSZ based amperometric NO x sensor for automotive exhausts [17][18][19], which has recently been commercialized by NGK (Japan) [20].…”

Section: Introductionmentioning

confidence: 99%