Results 261 to 270 of about 32,117 (298)

Proton conductive perovskite solid solutions with enhanced mechanical stability

Solid State Ionics, 1996
Abstract Perovskite solid solutions with formula SrYb0.05(Ce1 − xZrx)0.95O3 − α (x = 0, 0.25, 0.5, 0.75 and 1) were prepared. Their electrical behaviour was investigated using impedance spectroscopy between 200 and 1000 °C in different atmospheres, with and without hydrogen. Conductivities and their activation energies were obtained.
Thomas Matzke, Marcella Cappadonia
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Planar Defects and Incommensurate Phases in Highly Ordered Perovskite Solid Solutions

Physical Review Letters, 2002
A first-principles-derived approach is used to study the effects of planar defects on structural properties of a rocksalt-ordered Pb(Sc0.5Nb0.5)O3 alloy. These defects lead to unusual features, including a less symmetrical ground state with respect to the perfectly ordered material.
Igor A, Kornev, L, Bellaiche
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LaAl1–xMnxO3 perovskite-type oxide solid solutions: structural, magnetic and electronic properties

Physical Chemistry Chemical Physics, 2003
d-Al2O3 supported La, Mn, Co and Fe contg. catalysts were prepd. by impregnation of d-Al2O3 with citrate-type precursors and calcination at 1073 K. The catalysts were characterized by X-ray diffraction (XRD), UV-Vis diffuse reflectance spectroscopy (DRS), X-ray absorption spectroscopy (XAS), and BET sp. surface area detn. XRD revealed the presence of d-
CORDISCHI D., FATICANTI M., MINELLI G., OCCHIUZZI, Manlio, PORTA P.   +4 more
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ChemInform Abstract: SOLID‐STATE IONICS: PROTONIC CONDUCTION IN PEROVSKITE TYPE OXIDE SOLID SOLUTIONS

Chemischer Informationsdienst, 1981
AbstractOxidmischkristalle vom Perowskit‐Typ wie z.B. La, ‐xCaxYO3 ‐a oder Srlrog ° In0‐1O3 ‐o, besitzen, wie qualitativ mit einer elektrochemischen Methode bestätigt wird, in H, ‐Atrnosphäre bei hohen Temp. Protonenleitfähigkeit.
T. TAKAHASHI, H. IWAHARA
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Microheterogeneous Solid Solutions in Perovskites: Formation, Microstructure, and Catalytic Activity

ChemInform, 2004
AbstractChemInform is a weekly Abstracting Service, delivering concise information at a glance that was extracted from about 200 leading journals. To access a ChemInform Abstract, please click on HTML or PDF.
L. A. Isupova, S. V. Tsybulya, G. N. Kryukova, V. A. Rogov, I. S. Yakovleva, V. A. Sadykov   +5 more
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Phase Transitions in Perovskite Solid Solutions with Incipient Ferroelectrics

Ferroelectrics, 2004
The impurity-induced ferroelectric phase transitions in incipient perovskite ferroelectrics are discussed along with improper ferroelastic phase transitions. It is shown that the critical concentration of impurities is proportional to 1/ϵ3/2 and that the ferroelectric phase transitions probably suppress ferroelastic transitions.
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Perovskite solid solutions La0.75Bi0.25Fe1−xCrxO3: Preparation, structural, and magnetic properties

Journal of Solid State Chemistry, 2017
Abstract Solid solutions of La0.75Bi0.25Fe1−xCrxO3 (x = 0.1, 0.25, 0.5, and 0.75) prepared by conventional solid state reaction have been studied by means of X-ray powder diffraction (XRPD), neutron powder diffraction (NPD) and magnetic measurements. The NPD and XRPD patterns indicate orthorhombic structure (space group Pnma) for all compositions in ...
S.A. Ivanov, P. Beran, G. Bazuev, R. Tellgren, T. Sarkar, P. Nordblad, R. Mathieu   +6 more
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Probabilistic models of a local structure of perovskite solid solutions

Bulletin of the Russian Academy of Sciences: Physics, 2007
The magnitudes of the structure amplitudes (|F(h, k, l)|) of the X-ray diffraction reflections measured for a PbIn1/2Nb1/2O3 single crystal are compared with those calculated with the use of a sequence of probability-theoretical models constructed for the structure of the PbIn1/2Nb1/2O3 compound.
K. Yu. Gufan, R. V. Kolesova, V. V. Rumyantseva   +2 more
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Catalytic oxidation of CO on LaMn1−xFexO3 perovskites solid solution

Journal of Molecular Catalysis A: Chemical, 2014
Abstract Catalytic CO oxidation was studied over LaMn1−xFexO3 perovskites prepared by co-precipitation and rotor-vapor citrate method. The catalysts were characterized by X-ray diffraction (XRD), Transmission electron microscope (TEM) and X-ray photoelectron spectroscopy (XPS).
Saijing Zheng, Qing Hua, Wenbo Gu, Baizhan Liu   +3 more
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Lithium ion conductivity of A-site deficient perovskite solid solutions

Journal of Power Sources, 1999
Abstract Over twenty of A-site deficient perovskite solid solution with Li + ion conductivity (Li-ADPESSs) were prepared with the M and Li concentration fixed at M 0.56 Li 0.33 TiO 3 in the five series: (A) (La 1− X Nd X ) 0.56 Li 0.33 TiO 3 , (B) La 0.56 Li 0.33 M(IV) X Ti 1− X O 3 [M(IV)=Zr,Hf], (C) (Ca 1− X Sr X ) 0.56 Li 0.33 Ta 0.56 ...
Yasuhiro Harada, Hiroyuki Watanabe, Jun Kuwano, Yasukazu Saito   +3 more
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