Enhancing oxide-ionic conductivity of Ba3Mo1+xNb1-2xGexO8.5 at intermediate temperatures: the effect of site-selective Ge4+-substitution

2021 ◽  
Author(s):  
Zien Cheng ◽  
Jia Yang ◽  
Pengfei Jiang ◽  
He Huang ◽  
Ivan da Silva ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Coordination Geometry ◽  
Oxide Ionic Conductivity ◽  
Site Selective

Significant oxide-ionic conductivity has been recently reported for a family of cation-deficient hexagonal perovskite derivatives Ba3M2O8.5 (M = Mo/W6+ and Nb5+/V5+). Herein, the strong 4-fold coordination geometry preferred Ge4+ ions...

Low-Temperature Prepared Multi-Elements Doped CeO2 Electrolyte

2009 ◽  
Author(s):  
Horng-Yi Chang ◽  
Yao-Ming Wang
Keyword(s):  
Ionic Conductivity ◽  
Low Temperature ◽  
Mixed Oxide ◽  
Sintering Temperature ◽  
Solid Oxide ◽  
Evaporation Method ◽  
Pure Phase ◽  
Doped Ceo2 ◽  
Oxide Ionic Conductivity ◽  
Homogeneous Composition

CeO2 materials doped with the di- or tri-valent metals possess high oxide ionic conductivity at low temperature for potential electrolyte use in intermediate temperature solid oxide fuel cell (SOFC). However, multi-elements doped CeO2-based electrolyte, (La1-x-ySrxBay)0.175Ce0.825O2-δ (LSBC) in this work, with pure phase is difficultly synthesized at low calcination temperature. High sintering temperature, e.g. > 1500°C, is also needed in conventional mixed oxide method. In this work, nanoparticles less than 50nm of LSBC can be prepared by solution-evaporation method at constant temperature. Pure fluorite crystal structure can be obtained lower than 700°C. The optimal mole ratio of LSBC/citric acid in prepared solution is 1/2 to achieve homogeneous composition and pure phase of LSBC. Small grain size of about 1μm average is observed for 1300°C-microwave sintered LSBC by solution-evaporation method. The ionic conductivity of 1400°C-conventional sintered and 1300°C-microwave sintered LSBC prepared by solution-evaporation method is about 0.006 S/cm at 600°C but less than 0.004 S/cm at 600°C even for 1500°C-conventional sintered LSBC prepared by mixed oxide method.

Study on structure and oxide ionic conductivity for new compound Ce6−xLnxMoO15−δ

2006 ◽  
Vol 408-412 ◽  
pp. 645-648 ◽  
Author(s):  
Ping Che ◽  
Qibing Bo ◽  
Jing Feng ◽  
Qiuyan Wang ◽  
Xueqiang Cao ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Oxide Ionic Conductivity

scholarly journals Local Structure Adaptations and Oxide Ionic Conductivity in the Type III Stability Region of (1 – x)Bi2O3·xNb2O5

2018 ◽  
Vol 30 (10) ◽  
pp. 3387-3394 ◽  
Author(s):  
Julia Wind ◽  
Neeraj Sharma ◽  
Aleksey A. Yaremchenko ◽  
Vladislav V. Kharton ◽  
Douglas A. Blom ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Local Structure ◽  
Stability Region ◽  
Type Iii ◽  
Oxide Ionic Conductivity

Oxide ionic conductivity of apatite type Nd9·33(SiO4)6O2 single crystal

1999 ◽  
Vol 19 (4) ◽  
pp. 507-510 ◽  
Author(s):  
Susumu Nakayama ◽  
Masatomi Sakamoto ◽  
Mikio Higuchi ◽  
Kohei Kodaira ◽  
Mineo Sato ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Single Crystal ◽  
Oxide Ionic Conductivity ◽  
Apatite Type

Directional solidification of ZrO2–BaZrO3 composites with mixed protonic–oxide ionic conductivity

2014 ◽  
Vol 262 ◽  
pp. 654-658 ◽  
Author(s):  
Ricardo G. Carvalho ◽  
António J.S. Fernandes ◽  
Rui F. Silva ◽  
Florinda M. Costa ◽  
Filipe M. Figueiredo
Keyword(s):  
Ionic Conductivity ◽  
Directional Solidification ◽  
Oxide Ionic Conductivity

Structure and Oxide Ionic Conductivity for New Compound Ce6-xLnxMoO15-δ.

ChemInform ◽  
2006 ◽  
Vol 37 (20) ◽  
Author(s):  
Ping Che ◽  
Qibing Bo ◽  
Jing Feng ◽  
Qiuyan Wang ◽  
Xueqiang Cao ◽  
...  
Keyword(s):  
Ionic Conductivity ◽  
Oxide Ionic Conductivity
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