Two-step Synthesis of Yttrium-doped Barium Zirconate Protonic Conductors

2019 ◽  
Vol 25 (2) ◽  
pp. 1753-1757
Author(s):  
Olavo Oliveira ◽  
Tiago Andrade ◽  
Eliana N. Muccillo ◽  
Marco Berton ◽  
Carlos Garcia ◽  
...  
Keyword(s):  
Barium Zirconate ◽  
Protonic Conductors

Zircontes/Sulfates Composites: Perfect Combination of High- and Low-Temperature Protonic Conductors

2010 ◽  
Vol 434-435 ◽  
pp. 719-722
Author(s):  
Zhen Zhen Peng ◽  
Rui Song Guo ◽  
Zi Guang Yin ◽  
Juan Li
Keyword(s):  
Electrical Conductivity ◽  
Fuel Cell ◽  
Low Temperature ◽  
Electromotive Force ◽  
Ionic Transport ◽  
Proton Conductors ◽  
Transport Numbers ◽  
Barium Zirconate ◽  
Emf Measurements ◽  
Protonic Conductors

Two typical classes of proton conductors, zirconates and solid acids (such as CsHSO4) or related sulfates, are intensively investigated recently. Based on the different proton-conducting mechanisms of zirconates and sulfates, we designed and fabricated Y2O3-doped barium zirconate/sulfates composites, aiming to make full use of the benefits, and eliminate the drawbacks of the two individual materials. The electrical conduction of the composite was studied by electrical and electrochemical methods. Microstructure of the composites was examined by SEM. Electromotive force (EMF) measurements were conducted under fuel cell conditions. The results indicated that small amount of sulfates was introduced at the grain boundaries of BaZr0.9Y0.1O2.95. The electrical conductivity of the composites was greatly improved and the total ionic transport numbers of the composites are more than 0.9 at 750 °C.

scholarly journals The effect of ionic defect interactions on the hydration of yttrium-doped barium zirconate

2021 ◽  
Author(s):  
Sebastian Eisele ◽  
Fabian M. Draber ◽  
Steffen Grieshammer
Keyword(s):  
Monte Carlo ◽  
Monte Carlo Simulations ◽  
First Principles ◽  
Barium Zirconate ◽  
First Principles Calculations ◽  
Defect Interactions ◽  
The Impact ◽  
Ionic Defect

First principles calculations and Monte Carlo simulations reveal the impact of defect interactions on the hydration of barium-zirconate.

scholarly journals Graph analysis of proton conduction pathways in scandium-doped barium zirconate

2021 ◽  
Vol 154 (7) ◽  
pp. 074711
Author(s):  
Maria A. Gomez ◽  
Sophia Brooks-Randall ◽  
Gianna Cai ◽  
Juniper Glass-Klaiber ◽  
Yuxin Jiang ◽  
...  
Keyword(s):  
Proton Conduction ◽  
Barium Zirconate ◽  
Graph Analysis

Optimum dopant of barium zirconate electrolyte for manufacturing of protonic ceramic fuel cells

2021 ◽  
Vol 506 ◽  
pp. 230134
Author(s):  
Tomohiro Kuroha ◽  
Yoshiki Niina ◽  
Mizuki Shudo ◽  
Go Sakai ◽  
Naoki Matsunaga ◽  
...  
Keyword(s):  
Fuel Cells ◽  
Barium Zirconate ◽  
Ceramic Fuel ◽  
Ceramic Fuel Cells

scholarly journals High-Temperature Elastic Properties of Yttrium-Doped Barium Zirconate

Metals ◽  
2021 ◽  
Vol 11 (6) ◽  
pp. 968
Author(s):  
Fumitada Iguchi ◽  
Keisuke Hinata
Keyword(s):  
High Temperature ◽  
Young’S Modulus ◽  
Elastic Properties ◽  
Measurement Method ◽  
Young's Modulus ◽  
Barium Zirconate ◽  
Shear Moduli ◽  
Ceramic Fuel ◽  
Yttrium Concentration ◽  
Ceramic Fuel Cells

The elastic properties of 0, 10, 15, and 20 mol% yttrium-doped barium zirconate (BZY0, BZY10, BZY15, and BZY20) at the operating temperatures of protonic ceramic fuel cells were evaluated. The proposed measurement method for low sinterability materials could accurately determine the sonic velocities of small-pellet-type samples, and the elastic properties were determined based on these velocities. The Young’s modulus of BZY10, BZY15, and BZY20 was 224, 218, and 209 GPa at 20 °C, respectively, and the values decreased as the yttrium concentration increased. At high temperatures (>20 °C), as the temperature increased, the Young’s and shear moduli decreased, whereas the bulk modulus and Poisson’s ratio increased. The Young’s and shear moduli varied nonlinearly with the temperature: The values decreased rapidly from 100 to 300 °C and gradually at temperatures beyond 400 °C. The Young’s modulus of BZY10, BZY15, and BZY20 was 137, 159, and 122 GPa at 500 °C, respectively, 30–40% smaller than the values at 20 °C. The influence of the temperature was larger than that of the change in the yttrium concentration.

Effect of Slight ZnO Addition on the Structural, Morphological and Electrical Properties of Barium Zirconate Pellets

2019 ◽  
Vol 25 (2) ◽  
pp. 1767-1774
Author(s):  
Pascal Briois ◽  
Mohammad Arab Pour Yazdi ◽  
Samuel Georges ◽  
Aliaksandr Shaula ◽  
Albano Cavaleiro ◽  
...  
Keyword(s):  
Electrical Properties ◽  
Barium Zirconate
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