Results 301 to 310 of about 33,197 (330)

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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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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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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Magnetic exchange interactions in perovskite solid solutions. Part 3. Tin-119 Mössbauer spectra of doped iron perovskite solid solutions

J. Chem. Soc., Dalton Trans., 1983
A detailed study has been made of supertransferred hyperfine field (s.t.h.f.) effects at 119Sn doped into various perovskites with the formula (A0.95Ca0.05)(Fe0.85M0.10Sn0.05)O3 with A = La, Eu, or Lu and M = Al, Ga, Sc, Cr, Mn, Co, or Ni. The observed s.t.h.f.
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Oxyhydrides of (Ca,Sr,Ba)TiO₃ Perovskite Solid Solutions

Inorganic Chemistry, 2012
The oxyhydride solid solutions (Ca,Sr)TiO(3-x)H(x) and (Sr,Ba)TiO(3-x)H(x) have been prepared by reducing the corresponding ATiO(3) oxides with calcium hydride. Under the reaction conditions examined, a hydride content of x = 0.1-0.3 was obtained for all compositions. Compared to our previous result with BaTiO(3-x)H(x), the larger particle size in this
Tatsunori Sakaguchi, Yoji Kobayashi, Takeshi Yajima, Masatoshi Ohkura, Cédric Tassel, Fumitaka Takeiri, Shingo Mitsuoka, Hiroshi Ohkubo, Takafumi Yamamoto, Jung eun Kim, Naruki Tsuji, Akihiko Fujihara, Yoshitaka Matsushita, James Hester, Maxim Avdeev, Kenji Ohoyama, Hiroshi Kageyama   +16 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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