Results 261 to 270 of about 221,530 (305)

Oxygen ion conduction in barium doped LaInO3 perovskite oxides

Journal of Power Sources, 2014
Abstract 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, Shin Kim, Kyu-Hyung Lee, Hong-Lim Lee, Ki-Tae Lee   +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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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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Conductivity measurement of GaAs layers after oxygen ion bombardment

SPIE Proceedings, 1996
ABSTRACTThe 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, A. Romanowski, Maria Dabrowska-Szata   +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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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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Oxygen transfer between metals and oxygen‐ion conducting supports

AIChE Journal, 1988
AbstractThe charge‐transfer reactions in the three‐phase interfacial region, between a platinum catalyst, an yttria‐stabilized zirconia (YSZ) support, and the gas phase, were studied electrochemically during carbon monoxide oxidation. From electrochemical and reaction‐rate measurements, it appeared that oxygen was being removed from the support by ...
I. S. Metcalfe, S. Sundaresan
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Preparation of Oxygen Ion Conducting Ceramic Hollow-Fiber Membranes

Industrial & Engineering Chemistry Research, 2005
Hollow-fiber membranes of mixed conducting perovskite Ba_(0.5)Sr_(0.5)Co_(0.8)Fe_(0.2)O_(3-δ) were prepared using a sequence of extrusion, gelation, and sintering steps. For this purpose, a finely divided mixture of the component oxides was prepared by the modified Pechini technique and suspended in a polymer solution.
Liu, Shaomin, Gavalas, George R.
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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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