scholarly journals Oxygen detection using yttria-stabilized zirconia thin films doped with platinum

2005 ◽  
Vol 3 (4) ◽  
pp. 605-621 ◽  
Author(s):  
Dimitre Dimitrov ◽  
Ceco Dushkin

AbstractYttria stabilized zirconia (YSZ) thin films are obtained using both spray-pyrolysis and dip-coating. The ability of YSZ films incorporated with platinum nanospecies (Pt-YSZ) to detect oxygen is compared with that of pure YSZ thin films using a new experimental setup. With this system, the surface electrical resistance of the films as a function the oxygen content is measured at a fixed temperature. In addition, the effects of thermal annealing on the oxygen sensitivity of the films are observed. Platinum doped samples, Pt-YSZ, show different kinetics of carrier diffusion as compared to pure YSZ samples.

2004 ◽  
Vol 34 (6) ◽  
pp. 637-641 ◽  
Author(s):  
Yonglian Zhang ◽  
Jianfeng Gao ◽  
Guangyao Meng ◽  
Xingqin Liu

2007 ◽  
Vol 137 (1) ◽  
pp. 86-95 ◽  
Author(s):  
Dimitre Tzenov Dimitrov ◽  
Ceco Danov Dushkin ◽  
Nikolina Lalova Petrova ◽  
Rumyana Vasileva Todorovska ◽  
Dimiter Stefanov Todorovsky ◽  
...  

1998 ◽  
Vol 145 (12) ◽  
pp. 4277-4281 ◽  
Author(s):  
Yoshiharu Uchimoto ◽  
Kazushi Tsutsumi ◽  
Tsutomu Ioroi ◽  
Zempachi Ogumi ◽  
Zen‐ichiro Takehara

2021 ◽  
Vol 2021 ◽  
pp. 1-9
Author(s):  
Francisco J. Cano ◽  
Orlando Castilleja-Escobedo ◽  
L. J. Espinoza-Pérez ◽  
Cecilia Reynosa-Martínez ◽  
Eddie Lopez-Honorato

The effect of yttria concentration (0-33.4 mol%), extraction rates (0.17, 0.33, 0.50, and 0.67 mm s-1), and the number of layers (up to four) on the phase content, surface defects, thickness, hardness, adhesion strength, and wear rate of yttria-stabilized zirconia coatings produced by sol-gel/dip-coating were studied for its use on thermolabile substrates. At 700°C, a metastable tetragonal phase ( t ″ ) was obtained even with 33.4 mol% yttria when heat treated for 24 hours; however, a fully cubic structure was attained by extending the heat treatment up to 48 hours as confirmed by Raman spectroscopy. Furthermore, it was necessary to use withdrawal speeds of at least 0.67 mm s-1 to produce defect-free coatings. Although the coatings were produced at low temperature, they showed 41% lower wear rate than steel and an adhesion strength of 30 MPa. Our work stresses the importance of the heat treatment history on the stabilization of the cubic phase in sol-gel YSZ coatings.


2014 ◽  
Vol 18 (8) ◽  
pp. 2267-2277 ◽  
Author(s):  
Michèle Fee ◽  
Spyridon Ntais ◽  
Arnaud Weck ◽  
Elena A. Baranova

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