Results 271 to 280 of about 223,458 (307)
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Oxygen transfer between rhodium and an oxygen‐ion conducting support
AIChE Journal, 1988Etude comparative de l'activite catalytique d'un catalyseur rhodium sur support d'alumine et sur support de zircone stabilisee a l'Yttrium.
I. S. Metcalfe, S. Sundaresan
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Conductivity measurement of GaAs layers after oxygen ion bombardment
SPIE Proceedings, 1996ABSTRACTThe GaAs layers ofa thickness of200 nm and donor concentration ofabout 1018 cm were bombardedby Oions with doses above 1O' cm2 at the energies of 125, 150 and 250 keV. The dc and ac conducti-vities ofGaAs layers at the temperatures of77-330K were investigated.
Zdzistaw Synowiec +2 more
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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 +5 more
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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 +5 more
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The Proton and Oxygen Ion Conduction in a NaCl Based Composite Electrolyte
Journal of Materials Science Letters, 1999Proton conducting and oxygen-ion conducting materials are widely studied for their applications in fuel cells, electrolysis cells, electrochemical reactors, and sensors [1±3]. Proton electrolyte materials, include water-containing materials (HUP, etc.), oxo acids and their salts (CsHSO4, etc.), and complex oxides (MCeO3, MZrO3, etc., where M Ca, Sr ...
Shanwen Tao, Guangyao Meng
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Oxygen ion conduction in barium doped LaInO3 perovskite oxides
Journal of Power Sources, 2014Abstract Oxygen ion conduction behaviors of the 0–5 mol% excess Ba-doped La0.6Ba0.4InO3−δ cubic perovskite oxides have been investigated to elucidate their potential as electrolyte materials. The highest conductivity, 5.6 × 10−2 S cm−1 at 800 °C, is obtained at the 3 mol% excess Ba-doped composition benefiting from a supplementation of Ba2+ ions on ...
Hye-Lim Kim +4 more
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Electrical properties of mixed-conducting oxides having high oxygen-ion conductivity
Solid State Ionics, 1992Abstract Significant electronic conductivity is introduced into yttria-stabilized zirconia (YSZ) by the dissolution of titania. The important factors establishing the electronic conductivity at a constant temperature include the solid solubility of the multivalent metal oxide in YSZ, the impurity content of YSZ, and the oxygen pressure.
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Electrical properties of calcia-doped ceria with oxygen ion conduction
Solid State Ionics, 1986Abstract The electrical conductivity of sintered specimens of (CeO 2 ) 1− x (CaO) x was investigated by employing a standard four-probe dc technique as a function of temperature between 400°C and 900°C, composition from 0.10⩽ x ⩽0.80, and oxygen partial pressure from 10 −18 to 1 atm.
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Chemically-induced stresses in ceramic oxygen ion-conducting membranes
Solid State Ionics, 2000Many oxygen-ion conducting ceramics for potential application as membranes in solid oxide fuel cells, oxygen separators and partial oxidation reactors, suffer from a chemically-induced stress when subjected to a gradient in the thermodynamic activity of oxygen.
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Oxygen Ion Conductance in Epitaxially Grown Thin Film Electrolytes
2009This paper briefly summarizes the results from a project aimed to develop an understanding of oxygen ionic transport processes in highly oriented thin film oxide materials to enable the design of new types of electrolyte materials for solid state electrochemical devices.
S. Thevuthasan +7 more
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