Limiting Current Oxygen Sensors with LSM as Dense Diffusion Barrier

2008 ◽  
Vol 368-372 ◽  
pp. 263-264
Author(s):  
Yin Lin Wu ◽  
Ling Wang ◽  
Fu Shen Li ◽  
Yan Qin Zhao
Keyword(s):  
Diffusion Barrier ◽  
Solid Electrolytes ◽  
Oxygen Sensor ◽  
Low Cost ◽  
Limiting Current ◽  
Excellent Performance ◽  
Long Term Stability ◽  
Oxygen Ion ◽  
Ion Conducting

A thick film type of limiting current oxygen sensor which uses yttria (8% mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2MnO3 (LSM) as diffusion barrier was developed successfully. The oxygen sensor showed excellent performance at oxygen concentrations ranging from 0 to 10 ppm. The advantages of the sensor are simple construction, low cost and potential long term stability.

The Research about La0.8Sr0.2CoO3 Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors

2013 ◽  
Vol 703 ◽  
pp. 111-114
Author(s):  
Yin Lin Wu ◽  
Hai Yan Zhao ◽  
Fu Shen Li
Keyword(s):  
Diffusion Barrier ◽  
Solid Electrolytes ◽  
Oxygen Sensor ◽  
Low Cost ◽  
Limiting Current ◽  
Stabilized Zirconia ◽  
Long Term Stability ◽  
Oxygen Ion ◽  
Ion Conducting

The fabrication and operation of a new thick film type of limiting current oxygen sensor is demonstrated that utilizes yttria (8% mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2CoO3(LSC) as diffusion barrier. The oxygen sensor shows a near linear response between 0 to 10.5% O2in argon at 1023K. The advantages of the sensor are simple construction, low cost and potential long term stability.

Limiting Current Oxygen Sensors with LSF as Dense Diffusion Barrier

2007 ◽  
Vol 336-338 ◽  
pp. 417-419 ◽  
Author(s):  
Ling Wang ◽  
Fu Shen Li ◽  
Hui Zhu Zhou ◽  
Hui Xia ◽  
Mei Yang ◽  
...  
Keyword(s):  
Diffusion Barrier ◽  
Solid Electrolytes ◽  
Oxygen Sensor ◽  
Low Cost ◽  
Limiting Current ◽  
Long Term Stability ◽  
Oxygen Ion ◽  
New Type ◽  
Ion Conducting

A new type of limiting current oxygen sensor which uses yttria (8%mol) stabilized zirconia (YSZ) as oxygen ion conducting solid electrolytes and dense La0.8Sr0.2FeO3 (LSF) as diffusion barrier was developed successfully. The oxygen sensor shows excellent performance at oxygen concentrations range of from 0 to 21%. The advantages of the sensor are simple construction, low cost and potential long term stability.

The Research about La0.75Sr0.25Cr0.5Mn0.5O3-δ Application as Dense Diffusion Barrier in Limiting Current Oxygen Sensors

2013 ◽  
Vol 712-715 ◽  
pp. 1838-1842
Author(s):  
Yin Lin Wu ◽  
Qing Hui Wang ◽  
Hai Yan Zhao ◽  
Fu Shen Li
Keyword(s):  
Thick Film ◽  
Diffusion Barrier ◽  
Linear Response ◽  
Solid Electrolytes ◽  
Oxygen Sensor ◽  
Oxygen Sensors ◽  
Limiting Current ◽  
Oxygen Ion ◽  
Film Type ◽  
Ion Conducting

The fabrication and operation of a new thick film type of limiting current oxygen sensor is demonstrated that utilizes YSZ as oxygen ion conducting solid electrolytes and La0.75Sr0.25Cr0.5Mn0.5O3-δ+60% YSZ as dense diffusion barrier. The oxygen sensor shows a near linear response between 0 to 10ppm O2in argon at 973K.

scholarly journals A limiting Current Oxygen Sensor Constituted of (CeO2)0.95(Y2O3)0.05 as Solid Electrolyte Layer and (CeO2)0.75(ZrO2)0.25 as Dense Diffusion Barrier Layer

Sensors ◽  
2019 ◽  
Vol 19 (16) ◽  
pp. 3511
Author(s):  
Wang ◽  
Liu ◽  
Yu
Keyword(s):  
Solid Electrolyte ◽  
Oxygen Concentration ◽  
Barrier Layer ◽  
Diffusion Barrier ◽  
Oxygen Sensor ◽  
Limiting Current ◽  
Long Term Stability ◽  
Diffusion Barrier Layer ◽  
Sensing Characteristics

Using the co-precipitation method to synthesize (CeO2)0.95(Y2O3)0.05 (YDC) and solidreaction method to synthesize (CeO2)0.75(ZrO2)0.25 (ZDC), and the crystal structure, micro-structure,total conductivity and electronic conductivity of the two materials was measured with X-raydiffraction (XRD), scanning electron microscope (SEM), DC van der Pauw and Hebb-Wagnermethods. A limiting current oxygen sensor was prepared with YDC solid electrolyte and a ZDCdense diffusion barrier layer by employing platinum pasting bonding. Sensing characteristics ofthe sensor were obtained at different conditions, including temperature (T), oxygen concentration(x(O2)) and water vapor pressure (p(H2O)), and the influence of various conditions on sensingperformance was studied. The long-term stability of the sensor was measured in an oxygen concentration of 1.2% and at a temperature of 800 °C for 120 h. XRD results show that the phase structure of both YDC and ZDC belongs to the cubic phase. SEM results show that both YDC and ZDC layers are dense layers, which are then qualified to be the composition materials of the sensor. The limiting current (IL) of the sensor is obtained and the sensor exhibits good sensing characteristics to satisfy the Knudsen model. Log(IL·T) depends linearly on 1000/T with a squared correlation coefficient (R2) of 0.9904; IL depends linearly on x(O2) with an R2 of 0.9726; and sensing characteristics are not affected by p(H2O). It was found that the oxygen sensor has good long-term stability.

Study of YSZ Amperometric Oxygen Sensor with a Dense Barrier Layer

2007 ◽  
Vol 280-283 ◽  
pp. 431-434 ◽  
Author(s):  
Xing Shi ◽  
Yue Zhang
Keyword(s):  
Diffusion Barrier ◽  
Internal Combustion Engines ◽  
Oxygen Sensor ◽  
Composite Electrode ◽  
Low Cost ◽  
Limiting Current ◽  
Combustion Engines ◽  
Lean Burn ◽  
New Type ◽  
And Diffusion

A new type of amperometric oxygen sensor was developed by an approach of co-pressing and co-sintering YSZ solid electrolyte. A dense LSM+YSZ composite electrode which was used as both cathode and diffusion barrier. Pre-sintered composite and YSZ powders were dry-pressed together to form a sheet with dual-layer of LSM+YSZ/YSZ. The sheet was then sintered at 1450°C. The anode was made of Pt paste, which was printed on to the other side of YSZ. The experiment results showed that the oxygen sensor exhibited a quite low operating temperature. At 400°C, the limiting current appeared in the voltage from 0.7 to 1.2V and the limiting current was a good linear relationship with the oxygen concentration up to 10 %. The sensor has some excellent features such as a rapid response, no reference gas, simple configuration and low cost. Taken together with the chemical stability of the diffusion barrier, the sensor is suitable for the control of air-to-fuel ratio in lean-burn internal combustion engines.

scholarly journals Wittichenite semiconductor of Cu3BiS3 films for efficient hydrogen evolution from solar driven photoelectrochemical water splitting

2021 ◽  
Vol 12 (1) ◽  
Author(s):  
Dingwang Huang ◽  
Lintao Li ◽  
Kang Wang ◽  
Yan Li ◽  
Kuang Feng ◽  
...  
Keyword(s):  
Hydrogen Evolution ◽  
Water Splitting ◽  
Low Cost ◽  
Solar Hydrogen ◽  
Onset Potential ◽  
Term Stability ◽  
Long Term Stability ◽  
Solar Water Splitting ◽  
Current Densities

AbstractA highly efficient, low-cost and environmentally friendly photocathode with long-term stability is the goal of practical solar hydrogen evolution applications. Here, we found that the Cu3BiS3 film-based photocathode meets the abovementioned requirements. The Cu3BiS3-based photocathode presents a remarkable onset potential over 0.9 VRHE with excellent photoelectrochemical current densities (~7 mA/cm2 under 0 VRHE) and appreciable 10-hour long-term stability in neutral water solutions. This high onset potential of the Cu3BiS3-based photocathode directly results in a good unbiased operating photocurrent of ~1.6 mA/cm2 assisted by the BiVO4 photoanode. A tandem device of Cu3BiS3-BiVO4 with an unbiased solar-to-hydrogen conversion efficiency of 2.04% is presented. This tandem device also presents high stability over 20 hours. Ultimately, a 5 × 5 cm2 large Cu3BiS3-BiVO4 tandem device module is fabricated for standalone overall solar water splitting with a long-term stability of 60 hours.

Diffusion kinetics mechanism of oxygen ion in dense diffusion barrier limiting current oxygen sensors

2021 ◽  
Vol 855 ◽  
pp. 157465 ◽  
Author(s):  
Ke Shan ◽  
Zhong-Zhou Yi ◽  
Xi-Tao Yin ◽  
Lirong Cui ◽  
Davoud Dastan ◽  
...  
Keyword(s):  
Diffusion Barrier ◽  
Oxygen Sensors ◽  
Limiting Current ◽  
Diffusion Kinetics ◽  
Oxygen Ion

scholarly journals Fabrication of Superhydrophobic Magnetic Sawdust as Effective and Recyclable Oil Sorbents

Materials ◽  
2019 ◽  
Vol 12 (20) ◽  
pp. 3432
Author(s):  
Shumin Fan ◽  
Shuai Pei ◽  
Tianyu Shen ◽  
Guangri Xu ◽  
Yuanchao Li ◽  
...  
Keyword(s):  
Low Cost ◽  
Absorption Capacity ◽  
Magnetic Characteristics ◽  
Formaldehyde Resin ◽  
Water Contact ◽  
Long Term Stability ◽  
Oil Sorbent ◽  
Oil In Water ◽  
Oil Absorbent

In this paper, a novel superhydrophobic magnetic sawdust (SMSD) was fabricated as an oil sorbent. The SMSD was functionalized with Fe3O4 nanoparticles using melamine formaldehyde resin (MFR) as a coupling agent and subsequently hydrophobically-treated with hexadecyltrimethoxysilane (HDTMS). The SMSD showed excellent superhydrophobicity with the water contact angle of 155.3 ± 0.9°. Meanwhile it had remarkable environmental durability, long-term stability, and mechanical durable properties. Taking advantage of its magnetic characteristics, the SMSD could be easily controlled to absorb oil to separate oil–water mixtures with high oil absorption capacity and good reusability. Moreover, the emulsion was successfully separated by SMSD, including water-in-oil and oil-in-water emulsions. This study developed an effective oil absorbent, which was low cost and environmentally-friendly.

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