Results 261 to 270 of about 223,458 (307)

Oxygen ion conductivity in BaBi4Ti3MO14.5 (M=Sc, In and Ga)

Solid State Ionics, 1994
BaBi4Ti3MO14.5 (M=Ga, In and Sc), compounds that consist of intergrowths between the Aurivillius phase Bi4Ti3O12 and brownmilleritelike-layers of BaMO2.5 were synthesized and their oxygen ion conductivities were measured using complex impedance. All three materials display a discontinuity in Arrhenius plots of their ionic conductivity.
J THOMAS, K KENDALL, H ZURLOYE
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Oxygen ion conductivity in selected ceramic oxide materials

Solid State Ionics, 1988
Ionic conductivity measurements have been made on several novel oxide systems including tetragonal Zr 1–2x In 2x O 2−x , the perovskite related structure Sr 3 Ti 2 O 7 doped with Al or Mg, and cryolite type structures A 6 B 2 O 11 (A=Sr, Ba; B=Nb, Ta).
X. Turrillas, A.P. Sellars, B.C.H. Steele   +2 more
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Proton and oxygen ion conduction in nonoxide ceramics

Materials Research Bulletin, 2000
By directly examining fuel cell performances, it was discovered that nonoxide containing materials such as chlorides and fluorides exhibit significant proton and oxygen ion conduction. Ionic transport measurements showed that both proton and oxygen ion conduction are present, with proton conduction predominant in most cases. Steady-state current output
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Protonic and oxygen-ion conduction in SrZrO3-based materials

Journal of Materials Science, 1995
Strontium zirconate-based materials have been studied as potential high-temperature protonic conductors. Yttrium for zirconium substitution, and lanthanum for strontium substitution were selected to demonstrate that changes in composition can be used as a tool to design the properties. At temperatures below about 900 ° C, both yttrium-doped and undoped
J. A. Labrincha, F. M. B. Marques, J. R. Frade   +2 more
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Phase stability and oxygen ion conduction in Bi2O3−Pr6O11

Solid State Ionics, 1993
Abstract Oxygen ion conductivity was measured on a number of (Bi 2 O 3 ) 1− x (Pr 6 O 11 ) x systems from room temperature to 550°C. At x =0.05, the rhombohedral Bi 1.35 Pr 0.65 O 3 structure was found to be stable up to 550°C. At higher concentrations, a mixture of rhombohedral and possibly monoclinic type structures were determined, which at
Sammes N.M, Gainsford G.J.
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Mechanical behaviour of ceramic oxygen ion-conducting membranes

Solid State Ionics, 2000
Abstract In devices such as solid oxide fuel cells (SOFCs), oxygen separators and membrane reactors, the mechanical properties of the ceramic components are particularly important for estimating reliability. Here we summarise some recent studies of the mechanical properties of oxygen ion-conducting ceramics for the applications mentioned.
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Influence of Oxygen Ion Conduction on Nitric Oxide Decomposition

Journal of the American Ceramic Society, 1994
Ba 2 In 2 O 5 , Ba 2 Y 4 O 9 , and BaLa 2 O
Toshiyuki Mori, Hiroshi Yamamura, Hiroyuki Ogino, Hidehiko Kobayashi, Takashi Mitamura   +4 more
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Oxygen ion conduction in 12CaO·7Al2O3: O2− conduction mechanism and possibility of O− fast conduction☆

Solid State Ionics, 2009
Abstract 12CaO·7Al2O3 (C12A7) with a unique nano-porous structure and free O2− ions entrapped in sub-nanometer-sized cages is a fast oxygen-ion-conducting material. These free O2– may be replaced by various oxygen-related species, OH−, O2− and O−, by tuning the atmosphere during the heat treatment.
Hideo Hosono, Katsuro Hayashi, Koichi Kajihara, Peter V. Sushko, Alexander L. Shulger   +4 more
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Effect of aliovalent-cation substitution on the oxygen-ion conductivity of Bi4V2O11☆

Solid State Ionics, 1992
Up to 10 atom.% of $Li^+,Zn^{2+}, Al^{3+}, Ti^{4+} and Ge^{4+}$ readily substitute for vanadium in $Bi_4V_2O_{11}$ stabilizing $\alpha/\gamma$ structures. The $\gamma$-phases are good oxygen-ion conductors, the Ti-substituted $\gamma$-phase, $Bi_4V_{1.8}Ti_{0.2}O_{10.9}$, being the best ionic conductor among all the substituted bismuth vanadates ...
Sharma, Vandana, Shukla, AK, Gopalakrishnan, J   +2 more
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Oxygen ion conductivity in oxygen-deficient perovskite-related oxides

Materials Research Bulletin, 1976
Abstract Oxygen-deficient oxides with perovskite and perovskite-related structures have been prepared and their electrical conduction properties studied. The following materials were prepared in the form of dense single phase sintered specimens: CaTi 0.7 Al 0.3 O 2.85 □ 0.15 , Sr 3 NbO 5.5 □ 0.5 , Sr 2 CaTaO 5.5 □ 0.5 , Sr 2 CaNbO 5.5 □ 0.5 , LaAl 0.
K.W. Browall, O. Muller, R.H. Doremus
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