Gas selectivity of low-concentration oxidizing-gas sensor using complex impedance method

2017 ◽  
Author(s):  
Taku Horiguchi ◽  
Katsutoshi Saeki
Keyword(s):  
Gas Sensor ◽  
Complex Impedance ◽  
Impedance Method ◽  
Low Concentration ◽  
Gas Selectivity

Oxidizing gas sensor with low concentration using complex impedance

2018 ◽  
Vol 101 (9) ◽  
pp. 18-24
Author(s):  
Katsutoshi Saeki ◽  
Taku Horiguchi
Keyword(s):  
Gas Sensor ◽  
Complex Impedance ◽  
Low Concentration

Mechanosynthesis, Radiation-Thermal Modification and Characterization of Nanostructured Scandia Stabilized Zirconia Ceramics

2008 ◽  
Vol 1122 ◽  
Author(s):  
Vladimir V. Zyryanov ◽  
Nikolay F. Uvarov ◽  
Artem S. Ulihin ◽  
Vladislav A. Sadykov
Keyword(s):  
Solid Electrolytes ◽  
Room Temperature ◽  
Complex Impedance ◽  
Impedance Method ◽  
Sintering Aids ◽  
Zirconia Ceramics ◽  
Operation Temperature ◽  
Cubic Structure ◽  
Xrd Patterns

AbstractSSZ-based ceramics were obtained by sintering of nanopowders derived at room temperature by mechanochemical synthesis from refined technical grade ZrO2 nano-precursors. RT-treatment by 2.5 MeV electrons up to 1563 K was used for the modification of ceramics. Powders and ceramics were characterized by XRD, Raman, SEM and EDS, TEM, SIMS techniques. The phase composition of Zr0.89Sc0.1Ce0.01O1.95 ceramics was very close to cubic structure but better fitting of XRD patterns was obtained for rhombohedral lattice. Conductivity of solid electrolytes for IT SOFC was studied by complex impedance method. To stabilize cubic structure and increase conductivity at operation temperature of To ∼ 1000 K, the composition of SSZ solid electrolyte was optimized by addition of yttria and sintering aids. The interaction of admixtures with minor dopants leading to intergrain phase was revealed. During fast sintering, ceramics keep a memory about inhomogeneous disordered solid solutions in a form of nanostructuring. Conductivity data indicate nanostructuring of ceramics too: activation energies of bulk and grain boundary conductivities are close (Eb ∼ 0.9 eV, Egb ∼ 1.05 eV). Annealing of ceramics at high temperatures increases conductivity at To and promotes grain growth.

Low-Concentration NO2 Gas Sensor Based on HfO2 Thin Films Irradiated by Ultraviolet Light

2016 ◽  
Vol 45 (8) ◽  
pp. 3914-3920 ◽  
Author(s):  
Irmak Karaduman ◽  
Özlem Barin ◽  
Metin Özer ◽  
Selim Acar
Keyword(s):  
Thin Films ◽  
Gas Sensor ◽  
Ultraviolet Light ◽  
Low Concentration ◽  
No2 Gas Sensor

UV-enhanced NO2 sensor using ZnO quantum dots sensitized SnO2 porous nanowires

2022 ◽  
Author(s):  
Tianchen Jiang ◽  
xin liu ◽  
jianbo sun
Keyword(s):  
Quantum Dots ◽  
Gas Sensor ◽  
Uv Irradiation ◽  
Gas Sensing ◽  
Complex Impedance ◽  
Sensing Properties ◽  
Sensing Mechanism ◽  
No2 Sensor ◽  
Zno Quantum Dots ◽  
Uv Excitation

Abstract ZnO quantum dots sensitized SnO2 porous nanowires were fabricated and designed for UV excitation gas sensor. The ZnO/SnO2 composite (SZQ1%) with the molar proportion of 1:100 exhibits excellent sensing properties to NO2 gas under UV irradiation at 40oC. The humidity stability of SZQ1% was also measured and discussed by DC reversed circuit and complex impedance curves. The gas sensing mechanism is well discussed and illustrated to the ZnO quantum dots sensitized and the increased photo-generated carriers under UV irradiation.

PBG Fiber Low Concentration Gas Sensor

2008 ◽  
pp. 163-168
Author(s):  
Joanna Pawłat ◽  
Xue Feng Li ◽  
Takahiro Matsuo ◽  
Tadashi Sugiyama ◽  
Toshitsugu Ueda
Keyword(s):  
Gas Sensor ◽  
Low Concentration

scholarly journals Studies on Electrode Processes of Stabilized Zirconia Cell System by Complex Impedance Method

1981 ◽  
Vol 54 (6) ◽  
pp. 1688-1692 ◽  
Author(s):  
Jun Sasaki ◽  
Junichiro Mizusaki ◽  
Shigeru Yamauchi ◽  
Kazuo Fueki
Keyword(s):  
Complex Impedance ◽  
Cell System ◽  
Impedance Method ◽  
Stabilized Zirconia ◽  
Electrode Processes

scholarly journals Hydrothermal synthesis of p-type nanocrystalline NiO nanoplates for high response and low concentration hydrogen gas sensor application

2018 ◽  
Vol 44 (13) ◽  
pp. 15721-15729 ◽  
Author(s):  
Umesh T. Nakate ◽  
Gun Hee Lee ◽  
Rafiq Ahmad ◽  
Pramila Patil ◽  
Dhanaji P. Bhopate ◽  
...  
Keyword(s):  
Hydrothermal Synthesis ◽  
Gas Sensor ◽  
Hydrogen Gas ◽  
High Response ◽  
Low Concentration ◽  
Sensor Application ◽  
P Type
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