Results 221 to 230 of about 60,551 (267)

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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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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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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Oxygen ion conductivity in doped Gd2Ti2O7 with the pyrochlore structure

Ionics, 1996
Materials with the A2B2O7 pyrochlore structure have interesting ionic transport properties because of their crystallographic structure, which can be described as a stable array of corner-shared BO6 octahedra that is penetrated by a 3-dimensional tunnel configuration that is partly filled by the A2O sublattice.
U. Heider, L. Jörissen, R. A. Huggins, W. Witschel   +3 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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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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Characterisation, conductivity and mechanical properties of the oxygen-ion conductor La0.9Sr0.1Ga0.8 Mg0.2O3−x

Journal of Materials Chemistry, 1997
The new oxygen-ion conductor LaSrGaMgO has been prepared by conventional solid-state reaction at high temperatures and characterised by X-ray diffraction, scanning and transmission electron microscopy, and conductivity (four-probe dc and impedance) measurements. The room-temperature structure is orthorhombic, space group Pnma (no.
Drennan, John, Zelizko, Viktor, Hay, David, Ciacchi, Fabio T., Rajendran, S., Badwal, Sukhvinder P. S.   +5 more
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Oxidation of Dry Methane on the Surface of Oxygen Ion-Conducting Membranes

Catalysis Letters, 2003
The surface exchange limitations of oxygen permeation through dense mixed-conducting membranes enhance membrane stability, enabling the operation of mixed conductors, such as La0.3Sr0.7Co0.8Ga0.2O3-δ (LSCG) and La2Ni0.9Co0.1O4+δ (LNC), under air/dry CH4 gradient up to temperatures as high as 1173–1223 K.
A.A. Yaremchenko, A.A. Valente, V.V. Kharton, E.V. Tsipis, J.R. Frade, E.N. Naumovich, J. Rocha, F.M.B. Marques   +7 more
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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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