Results 281 to 290 of about 7,426 (305)

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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Mössbauer Studies of BiFeO3-PbTiO3 Perovskite-Type Solid Solutions

Journal of Applied Physics, 1971
The Mössbauer spectra of the ferroelectric solid solutions (BiFeO3)x(PbTiO3)1−x have been studied as a function of temperature, mainly between room temperature and 600°C, using 57Fe in the solutions as an absorber. The quadrupole splitting increased and the isomer shift decreased between x=0.05 and x=0.70, a range in which the solutions are tetragonal ...
C. M. Yagnik, R. Gerson, W. J. James
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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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Solid solution range of boron and properties of the perovskite-type NdRh3B

Journal of Alloys and Compounds, 2002
Abstract Polycrystalline samples of NdRh 3 B x have been synthesized by arc melting technique. The crystal structure of NdRh 3 B x is the perovskite-type cubic system (space group Pm 3 m ) for nominal boron concentration in the range of 0.706≤ x ≤1.000 (15–20 mol.% B). The lattice parameter a varies linearly from 0.41749(7) nm ( x =0.706)
Toetsu Shishido, Takahiko Sasaki, Kunio Kudou, Shigeru Okada, Akira Yoshikawa, Jung Min Ko, Jinhua Ye, Iwami Higashi, Masaoki Oku, Hiroyuki Horiuchi, Tsuguo Fukuda, Shigemi Kohiki, Kazuo Nakajima   +12 more
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Investigations on magnetically diluted KNixMg1–xF3 perovskite solid solution

Physica Status Solidi (a), 1988
The magnetic properties and EPR spectra of magnetically diluted KNixMg1−xF3 perovskite solid solutions are examined. The susceptibility measurements show that these compounds are isotropic antiferromagnetic materials at high nickel concentrations. A critical concentration is found to be x = 0.4.
D. Skrzypek, K. Bialas-Borgiel, Z. Celiński   +2 more
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Nonstoichiometry of the perovskite-type solid solution La0.9Ca0.1Cr1−Al O3−

Solid State Ionics, 2006
Abstract Nonstoichiometry of the perovskite-type solid solutions La0.9Ca0.1Cr1−yAlyO3−δ was studied by high-temperature gravimetry under controlled P(O2) atmospheres of 1–10− 23 bar at 1073–1273 K. The observed data were described by a regular solution-like model for the randomly distributed defects of VO¨ , CrCr. , CaLa,, and AlCrX.
Junichiro Mizusaki, Mamoru Hasegawa, Keiji Yashiro, Hiroshige Matsumoto, Tatsuya Kawada   +4 more
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Phase transitions in ferroelectric solid solutions of complex perovskites

Ferroelectrics, 1989
Abstract The phenomenological theory of ferro- and antiferroelectric solid solutions is proposed taking into account the possibility of compositional order variation. Complex perovskites AB′0.5B″0.5O3 where one of the cations is substituted are considered.
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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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Study of PbZr0.53Ti0.47O3 solid solution formation by interaction of perovskite phases

Journal of the European Ceramic Society, 2007
Abstract The formation of Pb(Zr0.53Ti0.47)O3 solid solution around the MPH was studied by mutual interaction of perovskite PZT phases (rhombohedral and tetragonal) and by interaction of PZT phases with PbTiO3 or PbZrO3 at sintering temperature.
Ľ. Medvecký, M. Kmecová, K. Saksl
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Perovskite solid solutions in the BaO-CuO-Y2O3-Nb2O5 system

Solid State Sciences, 1999
Abstract Freeze dried complex carboxylates are highly reactive precursors for complex perovskite solid solutions in the system BaO-CuO-Y2O3-Nb2O5 On thermal decomposition of the amorphous precursors the formation of complex crystalline phases begins at 600 °C. In most cases the themodynamically controlled phase composition is reached after a reaction
M. Bremer, H. Langbein
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