Electronic conductivity measurement of gadolinia doped ceria by DC-partial-polarization

Ionics ◽  
1999 ◽  
Vol 5 (1-2) ◽  
pp. 115-121 ◽  
Author(s):  
J. Liu ◽  
W. Weppner
Keyword(s):  
Electronic Conductivity ◽  
Conductivity Measurement ◽  
Doped Ceria ◽  
Partial Polarization

Electronic conductivity measurement of Sm- and La-doped ceria ceramics by Hebb?Wagner method

2004 ◽  
Vol 174 (1-4) ◽  
pp. 27-33 ◽  
Author(s):  
T SHIMONOSONO ◽  
Y HIRATA ◽  
Y EHIRA ◽  
S SAMESHIMA ◽  
T HORITA ◽  
...  
Keyword(s):  
Electronic Conductivity ◽  
Conductivity Measurement ◽  
Doped Ceria ◽  
La Doped

Electrical Properties of Y0.06Sr0.94Ti0.6Fe0.4O3-δ-YSZ Composites as Electrode Materials

2016 ◽  
Vol 697 ◽  
pp. 327-330 ◽  
Author(s):  
Ke Shan ◽  
Xing Min Guo ◽  
Feng Rui Zhai ◽  
Zhong Zhou Yi
Keyword(s):  
Electrical Conductivity ◽  
Electrode Materials ◽  
Electronic Conductivity ◽  
Ionic Conductivities ◽  
Conductivity Measurement ◽  
Transference Numbers ◽  
Secondary Phases ◽  
Electrical Conductivity Measurement ◽  
Total Electrical Conductivity ◽  
Phase Compatibility

Y0.06Sr0.94Ti0.6Fe0.4O3-δ-YSZ composites were prepared by mixing Y, Fe co-doped SrTiO3 (Y0.06Sr0.94Ti0.6Fe0.4O3-δ known as YSTF) and 8 mol% Y2O3 stabilized ZrO2 (YSZ) in different weight fractions. The phase stability, phase compatibility, microstructure and mixed ionic-electronic conductivity of composites were investigated. Phase analysis by XRD showed no clearly detectable secondary phases. The electrical conductivity measurement on the YSTF-YSZ composites showed a drastic decrease in total electrical and ionic conductivities when more than 10 wt% of YSZ was used in the composites. The total electrical conductivity was 0.102 S/cm for Y0.06Sr0.94Ti0.6Fe0.4O3-δ and 0.043 S/cm for YSTF-20YSZ at 700 oC, respectively. The value at 700 oC is approximately 2.4 times higher than that of YSTF-20YSZ. The ionic conductivity of Y0.06Sr0.94Ti0.8Fe0.2O3-δ varies from 0.015S/cm at 700 oC to 0.02 S/cm at 800 oC, respectively. The value at 800°C is approximately 12.5 times higher than YSTF-20YSZ. The ion transference numbers of YSTF-YSZ composites vary from 0.14 to 0.28 at 800 °C.

Electronic conductivity in Gd-doped ceria with salt additions

2019 ◽  
Vol 318 ◽  
pp. 977-988 ◽  
Author(s):  
João P.F. Grilo ◽  
Daniel A. Macedo ◽  
Rubens M. Nascimento ◽  
Fernando M.B. Marques
Keyword(s):  
Electronic Conductivity ◽  
Doped Ceria

Electronic conductivity in gadolinium doped ceria under direct current as a trigger for flash sintering

2020 ◽  
Vol 179 ◽  
pp. 55-60 ◽  
Author(s):  
Tarini Prasad Mishra ◽  
Rubens Roberto Ingraci Neto ◽  
Giorgio Speranza ◽  
Alberto Quaranta ◽  
Vincenzo M. Sglavo ◽  
...  
Keyword(s):  
Direct Current ◽  
Electronic Conductivity ◽  
Doped Ceria ◽  
Flash Sintering ◽  
Gadolinium Doped Ceria

Electrical Conductivity of Mixed Conductors (YO1.5)x-(CeO2)y-(ZrO2)1-x-y

2007 ◽  
Vol 336-338 ◽  
pp. 424-427
Author(s):  
Xiang Yong Zhou ◽  
Zeng Fan ◽  
Zi Long Tang ◽  
Zhong Tai Zhang
Keyword(s):  
Electrical Conductivity ◽  
Metal Ion ◽  
Solid Phase ◽  
Electronic Conductivity ◽  
Synthesis Method ◽  
Conductivity Measurement ◽  
Fluorite Structure ◽  
Charge Balance ◽  
Phase Synthesis ◽  
Oxygen Ion

The Y2O3-ZrO2 binary system ceramic is considered to be most developed in application to the ZrO2-based materials. A cubic fluorite structure is generally achieved, as the metal ion of the additive (Y) takes place of the Zr4+ and oxygen ion vacancies are produced in the lattice to maintain the charge balance. This leads to almost totally ionic conductivity. The introduction of changeable valued CeO2 can further improve the total electronic conductivity through the defect equilibrium reaction between tetravalent Ce4+ and trivalent Ce3+ at high temperature and reducing atmosphere. In this study, solid phase synthesis method was employed for the preparation of (YO1.5)x-(CeO2)0.08-(ZrO2)0.9-x and (YO1.5)0.05-(CeO2)y- (ZrO2)0.95-y ceramics, while four probe DC conductivity measurement method was also applied under the temperature between 300 to 800°C. The results prove that the concentration of Y3+ is the main contribution of the electrical conductivity at low temperature.

scholarly journals Control of Pedicle Screw Placement with an Electrical Conductivity Measurement Device: Initial Evaluation in the Thoracic and Lumbar Spine

2016 ◽  
Vol 2016 ◽  
pp. 1-7 ◽  
Author(s):  
Olaf Suess ◽  
Markus Schomacher
Keyword(s):  
Electrical Conductivity ◽  
Electronic Conductivity ◽  
Spinal Instrumentation ◽  
Pedicle Screws ◽  
Conductivity Measurement ◽  
Electrical Conductivity Measurement ◽  
Measurement Device ◽  
Degenerative Spinal Disease ◽  
Single Use ◽  
Transpedicular Screw Fixation

Aim. Transpedicular screw fixation is widely used in spinal surgery. But the insertion of pedicle screws can sometimes be challenging because of the variability in pedicle size and the proximity of nerve roots.Methods. We detected intraoperatively the sensitivity for iatrogenic pedicel perforation with a hand-held electronic conductivity measurement device (ECD) that measures electrical conductivity of tissue-medium surrounding the instrument tip. ECD was used to guide the placement of 84 pedicle screws in 15 patients undergoing surgery for tumor or degenerative spinal disease at various spinal levels from T8 to L5. Additionally a CT-scan controlled screw positioning postoperatively.Results. The placement was “correct” (no mediocaudal pedicle wall penetration) for 78 of 84 (92,8%) screws, “suboptimal but acceptable” (0–2 mm penetration) for 4 of 84 (4,8%) screws, and “misplaced” (penetration > 2 mm) for 2 of 84 (2,4%) screws.Conclusion. Although this study was not designed to compare electronic conductivity technique to other guidance methods, such as fluoroscopy or navigation, a convincing “proof of concept” for ECD use in spinal instrumentation could be demonstrated. Advantages include easy handling without time-consuming setup and reduced X-ray exposure. However, further investigations are necessary to evaluate i.a. the economic aspects for this single-use developed instrument.

Optimized mixed ionic–electronic conductivity in two-phase ceria–zirconia composite with cobalt oxide and Na2CO3 as suitable additives

2016 ◽  
Vol 4 (12) ◽  
pp. 4402-4412 ◽  
Author(s):  
Aditya Maheshwari ◽  
Hans-Dieter Wiemhöfer
Keyword(s):  
Cobalt Oxide ◽  
Sodium Carbonate ◽  
Electronic Conductivity ◽  
Composite Membranes ◽  
Electronic Conduction ◽  
Doped Ceria ◽  
Two Phase ◽  
Mixed Ionic Electronic Conductivity

Excellent mixed ionic–electronic conduction was achieved in composite membranes of Ta doped ceria (TDC) and Y doped zirconia (YSZ) by suitable amounts of cobalt oxide and sodium carbonate.

scholarly journals The Impact of Fe Addition on the Electronic Conductivity of Gadolinium Doped Ceria

2019 ◽  
Vol 8 (1) ◽  
pp. P41-P50
Author(s):  
A. Buchheit ◽  
B. Teßmer ◽  
K. Ran ◽  
J. Mayer ◽  
H.-D. Wiemhöfer ◽  
...  
Keyword(s):  
Electronic Conductivity ◽  
Doped Ceria ◽  
The Impact ◽  
Fe Addition ◽  
Gadolinium Doped Ceria
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