Auger and SIMS study of segregation and corrosion behaviour of some semiconducting oxide gas-sensor materials

Várhegyi, E.B.; Perczel, I.V.; Gerblinger, J.; Fleischer, Maximilian; Meixner, H.; Giber, J.

doi:10.1016/0925-4005(93)01088-l

Cited by 34 publications

(12 citation statements)

References 5 publications

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“…However, the discontinuous layer of water molecules on the surface of the film leads to the difficulty of electrolytic conduction. For high humidity, however, more and more water layers can be formed on the surface of nanoparticles by physisorption mechanism [3,9,10]. As the dominant charged carriers, H + decomposed from water molecules can further decrease the impedance.…”

Section: Resultsmentioning

confidence: 99%

“…In order to obtain fine nanocrystlline powders, various method have been proposed. In contrast, the hydrothermal technique is an ideal route for synthesizing varous nano-sized materials with high purity and controlled structure at relatively low reaction temperature [8]. Due to the high surface energy of nanoparticels, however, the products are easy to coagulate and difficult to disperse in water.…”

Section: Introductionmentioning

confidence: 99%

“…Several materials have been studied as sensing elements in humidity sensors. The desirable characteristics of ideal humidity sensing materials should possess: good sensitivity over the entire range of humidity and temperature, stable chemical and physical property over time and thermal cycling, rapid response and recovery time, and low hysteresis [3]. Generally speaking, the humidity sensors are mainly fabricated by two kinds of materials: organic polymer films and porous ceramic films [4].…”

Section: Introductionmentioning

confidence: 99%

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Effects of Surfactants on the Performance of ZrO2 Humidity Sensors

Wang¹,

Jie²,

Wang³

2017

Proceedings of the 7th International Conference on Education, Management, Information and Mechanical Engineering (EMIM 2017)

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Abstract. Nano-sized ZrO2 powders were synthesized by hydrothermal method with two types of surfactants (cetyltrimethyl ammonium bromide (cationic surfactant, CTAB), and sodium dodecylbenzene sulfonate (anionic surfactant, SDBS)). The phase structures and morphologies of the products were investigated by X-ray diffraction and scanning electron microscope. The sample with CTAB as surfactant (ZrO2-C) shows larger specific surface area and smaller particle size than ZrO2-S. The humidity sensor fabricated by ZrO2-C shows higher performance than the sample used SDBS as surfactant. The impedance of the ZrO2-C sensor decreases by about four orders of magnitude with relative humidity (RH) changed from 11 to 95%. The response and recovery time are 60 and 70 s, respectively. These results indicate that the performance of ZrO2 humidity sensors can be improved effectively by the addition of cationic surfactant.

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Section: Resultsmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

Section: Introductionmentioning

confidence: 99%

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Effects of Surfactants on the Performance of ZrO2 Humidity Sensors

Wang¹,

Jie²,

Wang³

2017

Proceedings of the 7th International Conference on Education, Management, Information and Mechanical Engineering (EMIM 2017)

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“…We have studied resistive oxygen sensors using cerium oxide as a sensor material [6-10], which has advantageous features such as durability against corrosive gases in vehicle exhaust [11-13]. The response time of a sensor using a cerium oxide thick film was improved by reducing the particle size from 2,000 to 100 nm in the thick film [14].…”

Section: Introductionmentioning

confidence: 99%

Resistive Oxygen Sensor Using Ceria-Zirconia Sensor Material and Ceria-Yttria Temperature Compensating Material for Lean-Burn Engine

Izu

Nishizaki

Shin

et al. 2009

Sensors

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Temperature compensating materials were investigated for a resistive oxygen sensor using Ce0.9Zr0.1O2 as a sensor material for lean-burn engines. The temperature dependence of a temperature compensating material should be the same as the sensor material; therefore, the Y concentration in CeO2-Y2O3 was optimized. The resistance of Ce0.5Y0.5O2-δ was independent of the air-to-fuel ratio (oxygen partial pressure), so that it was confirmed to function as a temperature compensating material. Sensor elements comprised of Ce0.9Zr0.1O2 and Ce0.5Y0.5O2-δ were fabricated and the output was determined to be approximately independent of the temperature in the wide range from 773 to 1,073 K.

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“…12) Cerium dioxide also offers superior resistance to corrosive gases. 13) Although several researches have been reported on resistive oxygen sensors of cerium dioxide, 14)-17) response mechanism has not been clarified yet.…”

Section: Strategies and Challenges For Increasing The Response Speed mentioning

confidence: 99%

Nanostructural design of electrically conductive ceramics and its application in gas sensors

Murayama

2008

J. Ceram. Soc. Japan

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Most of gas sensors are "surface type" gas sensors that utilize only changes in physical properties near the surface of grains. In this paper, the concept of "non-surface type" gas sensors that utilize changes in physical properties throughout the entire grain is proposed. In particular, we focused on a resistive oxygen sensor as one type of "non-surface type" gas sensor, and achieved notable performance with high-speed response to the order of milliseconds in addition to elucidating details of the response mechanism and investigating the stability of the sensor, which is a substantial advantage of "non-surface type" gas sensors. Next, we demonstrated the extension to flammable gas sensors by incorporating a flammable gas-reactive layer into the resistive oxygen sensor. Furthermore, in order to achieve highly sensitive and highly selective "non-surface type" gas sensors, a new sensor material was developed consisting of alternating layers at the molecular level of an inorganic layer to perform the signal conversion function and an organic layer to perform the molecular recognition function. Aldehyde gases were detected selectively by appropriate nanostructural design of the new material.

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Auger and SIMS study of segregation and corrosion behaviour of some semiconducting oxide gas-sensor materials

Cited by 34 publications

References 5 publications

Effects of Surfactants on the Performance of ZrO2 Humidity Sensors

Effects of Surfactants on the Performance of ZrO2 Humidity Sensors

Resistive Oxygen Sensor Using Ceria-Zirconia Sensor Material and Ceria-Yttria Temperature Compensating Material for Lean-Burn Engine

Nanostructural design of electrically conductive ceramics and its application in gas sensors

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