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Search Results:　 1-20 of 116

1

Dielectric Properties and Oxide-Ion Conduction for Y2O3 Stabilized ZrO2 and Bi2O3

Yagi Yuhji , Saito Miwa , Yamamura Hiroshi

… (25YSB) which are oxide ion conductors having a fluorite type structure were investigated. …

Jpn J Appl Phys 50(7), 071501-071501-6, 2011-07-25

The Japan Society of Applied Physics
2

Effect of Fe content on physical properties of BaO–CeOx–FeOy catalysts for direct NO decomposition

Hong Won-Jong , Ueda Mao , Iwamoto Shinji , Hosokawa Saburo , Wada Kenji , Kanai Hiroyoshi , Deguchi Hiroshi , Inoue Masashi

… The X-ray absorption near edge structure, electron spin resonance, and diffuse reflectance UV–vis spectra indicated that the optimum catalyst had the highest proportion of isolated tetrahedral Fe[3+] ions in all the Fe species. … Raman spectra suggested that incorporation of Fe[3+] in the fluorite structure of CeO2 caused an increase in the concentration of oxygen vacancies, which play an important role in the NO decomposition activity of the catalysts. …

Applied Catalysis B: Environmental 106(1-2), 142-148, 2011-07

IR CrossRef
3

Effect of Mn content on physical properties of CeOx–MnOy support and BaO–CeOx–MnOy catalysts for direct NO decomposition

Hong Won-Jong , Iwamoto Shinji , Hosokawa Saburo , Wada Kenji , Kanai Hiroyoshi , Inoue Masashi

… The X-ray diffraction and Raman analyses indicated the formation of Ce–Mn oxide solid solutions with a cubic fluorite structure. … Incorporation of Mn2+ in the fluorite structure of CeO2 causes an increase in the concentration of oxygen vacancies, which play an important role in the NO decomposition activity of the catalysts. …

Journal of Catalysis 277(2), 208-216, 2011-01-24

IR CrossRef
4

Electrode effects on dielectric relaxation in oxide-ion conductor Ce0.7Yb0.3O2-δ having a fluorite-type structure

Yagi Yuhji , Satake Jun , Saito Miwa [他]

Japanese journal of applied physics 50(6), 065804-1-5, 2011-06
5

Magnetic properties and structural transitions of orthorhombic fluorite-related compounds Ln3MO7 (Ln = rare earths, M = transition metals)

Wakeshima Makoto , Hinatsu Yukio

… They crystallize in an orthorhombic superstructure of cubic fluorite with space group P2_[1]2_[1]2_[1], in which Ln^[3+] ions occupy two different crystallographic sites (the 8-coordinated and 7-coordinated sites). …

Journal of Solid State Chemistry 183(11), 2681-2688, 2010-11

IR CrossRef
6

Perpendicular Magnetic Anisotropy of Iron–Cobalt Silicide Nanowires on Si(110)

Ohira Yutaka , Tanji Takayoshi

… Transmission electron microscopy (TEM) and energy-dispersive X-ray spectroscopy (EDX) reveal that NWs have a fluorite structure including both Fe and Co. Electron holography (EH) reveals that the magnetization of an NW is perpendicular to its long axis and is ca. …

Jpn J Appl Phys 49(7), 073001-073001-3, 2010-07-25

The Japan Society of Applied Physics
7

Superconductivity Above 40 K Observed in a New Iron Arsenide Oxide (Fe2As2)(Ca4(Mg,Ti)3Oy)

Ogino Hiraku , Shimizu Yasuaki , Ushiyama Koichi , Kawaguchi Naoto , Kishio Kohji , Shimoyama Jun-ichi

… Its crystal structure is tetragonal with a space group of $I4/mmm$ consisted of the anti-fluorite type FeAs layer and blocking layer of triple perovskite cells and is identical with (Fe2As2)(Sr4(Sc,Ti)3O8) discovered in our previous study. …

Applied Physics Express 3(6), 063103-063103-3, 2010-06-25

The Japan Society of Applied Physics References (11)
8

Direct Decomposition of NO on Ba Catalysts Supported on Ce–Fe Mixed Oxides

Hong Won-Jong , Iwamoto Shinji , Inoue Masashi

… The XRD results indicated the formation of Ce–Fe(x) solid solutions with a cubic fluorite structure. …

Catalysis Letters 135(3-4), 190-196, 2010-04

IR CrossRef
9

Crystal Structure Analysis of Ionic Conducting Ceramic Materials by Means of Neutron Diffractometry [in Japanese]

YASHIMA Masatomo

Radioisotopes 59(3), 201-210, 2010-03-15

References (23) Cited by (1)
10

Structures and energetics of Bi_{2}O_{3} polymorphs in a defective fluorite family derived by systematic first-principles lattice dynamics calculations

Matsumoto Akifumi , Koyama Yukinori , Tanaka Isao

… A series of dynamically stable structures of the defective fluorite-Bi2O3 is found by first-principles lattice dynamics calculations. … A bixbyite-type vacancy-array structure is also found to be another stable phase in the present study, which is named η-Bi2O3. … It is suggested that the three stable structures of Bi2O3 are ordered low-temperature polymorphs of the disordered δ-Bi2O3 in the defective fluorite-Bi2O3 family. …

Physical Review B 81(9), 2010-03

IR CrossRef
11

Optimization of electrochemical synthesis conditions for dense and doped ceria thin films

Kamada Kai , Enomoto Naoya , Hojo Junichi

… The XRD pattern and Raman spectrum of the thin film revealed that the film was crystallized as the fluorite structure without any heat treatment, and Sm3+ is substituted at the Ce4+ site. …

Electrochimica Acta 54(27), 6996-7000, 2009-11-30

IR CrossRef
12

Electrical conductivity in the (Bi_<0.8-x>Ln_xEr_<0.2>)_2O_3 (Ln=La, Pr, Nd) systems

YAMAMURA Hiroshi , HIGASA Mitsuo , YAGI Yuhji , TAKAYAMA Toshio

In order to improve the electrical properties of stabilized Bi2O3 such as oxide-ion conductivity, conductivity degradation by annealing and reduction resistivity, the solid solution systems, (Bi0.8-xL …

Journal of the Ceramic Society of Japan 117(1368), 887-890, 2009-08-01

J-STAGE CrossRef References (14)
13

Thermal Conductivity of Hafnium Hydride

ITO Masato , KUROSAKI Ken , MUTA Hiroaki , UNO Masayoshi , KONASHI Kenji , YAMANAKA Shinsuke

… It was confirmed that all the Hf hydrides prepared in the present study exhibited a cubic delta phase with the fluorite-type structure. …

Journal of Nuclear Science and Technology 46(8), 814-818, 2009-08-01

J-STAGE CrossRef References (15) Cited by (2)
14

Transmission Electron Microscopy Study of Sn-Doped Sintered Indium Oxide

ISHIKAWA Yoshimitsu , NAGAYAMA Hitoshi , HOSHINO Hirokuni , OHGAI Michiharu , SHIBATA Naoya , YAMAMOTO Takahisa , IKUHARA Yuichi

Materials Transactions 50(5), 959-963, 2009-05-01

References (9)
15

Diffusion Paths of Mobile Ions Studied by Precise Structure Analysis of Powder Diffraction Data Measured in situ at High Temperatures [in Japanese]

YASHIMA Masatomo

… directions are observed in the fluorite-type ionic conductors such as δ-Bi1.4Yb0.6O3, Ce0.93Y0.07O1.96, Y0.785Ta0.215O1.715 and α-CuI. …

Nihon Kessho Gakkaishi 51(2), 153-161, 2009-04-30

J-STAGE References (72) Cited by (2)
16

New anti-fluorite solid-solution phases in Li-Ti-N ternary system

YAMADA Atsuo , MORI Shunsuke , IYAMA Hiromasa , KANNO Ryoji , SHIBATA Masatoshi

… New Li-Ti-N solid-solution compounds with an anti-fluorite-type superstructure were synthesized by heating the mixture of Li_3N and TiN at 800℃ in Ar flow. … the anti-fluorite-type superstructure of Li_5TiN_3 (y=0) was retained up to y=ca. … 0.9, which is close to the end member Li_3N (y=1) with a different layered structure. …

Journal of the Ceramic Society of Japan 117(1361), 52-55, 2009-01-01

CiNii Fulltext PDF - Open Access J-STAGE CrossRef
17

Formation of C-type rare earth structures in the Ce1-xNdxO2-δ system: a factor in the decrease in oxide-ion conductivity

HAGIWARA Takeshi , KYO Zuiho , MANABE Akitaka , YAMAMURA Hiroshi , NOMURA Katsuhiro

… In order to clarify the origin of the decrease in the conductivity of the heavily Nd-doped CeO2, Rietveld analyses of the X-ray diffraction and neutron diffraction data were carried out, assuming two phases with oxygen deficient fluorite-type and rare-earth C-type structures (0.45 ≤ …

Journal of the Ceramic Society of Japan 117(1372), 1306-1310, 2009

J-STAGE CrossRef Cited by (1)
18

Diffusion pathway of mobile ions and crystal structure of ionic and mixed conductors - A brief review

YASHIMA Masatomo

… A brief review on the field of Solid State Ionics, including the diffusion pathway of mobile ions, crystal structure and materials, is presented. … In the fluorite-structured ionic conductors such as ceria solid solution Ce0.93Y0.07O1.96, bismuth oxide solid solution δ-Bi1.4Yb0.6O3 and copper iodide CuI, a similar curved diffusion pathway along the <100> …

Journal of the Ceramic Society of Japan 117(1370), 1055-1059, 2009

J-STAGE CrossRef Cited by (2)
19

Relationship between Oxide-Ion Conduction and Dielectric Properties of Gd2Zr2O7 Having a Fluorite-Type Structure

Yamamura Hiroshi , Nishino Hanako , Kakinuma Katsuyoshi

… The relationship between electrical conduction and dielectric properties was investigated for the oxide-ion conductor Gd2Zr2O7 having a fluorite-type structure. …

Jpn J Appl Phys 47(7), 5521-5525, 2008-07-25

The Japan Society of Applied Physics Cited by (2)
20

Dielectric Relaxations in the Ce1-xYbxO2-δ System

Yamamura Hiroshi , Satake Jun , Saito Miwa , Kakinuma Katsuyoshi

The dielectric properties of Yb-doped CeO2 (Ce1-xYbxO2-δ) which is an oxide-ion conductor were investigated. Numerical analysis of the frequency dependences of dielectric constants ($\varepsilon'$) an …

Jpn J Appl Phys 47(1), 212-216, 2008-01-25

The Japan Society of Applied Physics Cited by (2)

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