SciAct
Toggle navigation
  • EN
  • RU

Sections:

  • Articles
  • Books
  • Conference attendances
  • Conference theses
  • Patents

Synthesis and Properties of Nanocomposites with Mixed Ionic–Electronic Conductivity on the Basis of Oxide Phases with Perovskite and Fluorite Structures Full article

Общее Language: Английский, Genre: Full article,
Status: Published, Source type: Translated
Conference Structural Chemistry of Partially Ordered Systems, Nanoparticles and Nanocompositesv: Topical Meeting of the European Ceramic Society
27-29 Jun 2006 , Saint-Petersburg
Journal Glass Physics and Chemistry
ISSN: 1087-6596 , E-ISSN: 1608-313X
Output data Year: 2007, Volume: 33, Number: 4, Pages: 320-334 Pages count : 15 DOI: 10.1134/S1087659607040049
Authors Sadykov V.A. 1,2 , Borchert Yu.V. 2 , Alikina G.M. 1 , Lukashevich A.I. 1 , Mezentseva N.V. 1 , Muzykantov V.S. 1 , Moroz E.M. 1 , Rogov V.A. 1 , Zaikovskii V.I. 1 , Zyuzin D.A. 1 , Uvarov N.F. 3 , Ishchenko A.V. 1 , Zy'ryanov V.V. 3 , Smirnova A. 4
Affiliations
1 Boreskov Institute of Catalysis, Siberian Division, Russian Academy of Sciences, pr. Akademika Lavrent’eva 5, Novosibirsk, 630090 Russia
2 Novosibirsk State University, ul. Pirogova 2, Novosibirsk, 630090 Russia
3 Institute of Solid-State Chemistry and Mechanochemistry, Siberian Division, Russian Academy of Sciences,ul. Kutateladze 18, Novosibirsk, 630158 Russia
4 Connecticut Global Fuel Cell Center, University of Connecticut, 44 Weaver Rd., Storrs, CT, 06269-5233 United States

Funding (3)

1 Президиум СО РАН 95
2 North Atlantic Treaty Organization SfP-980878
3 International Science and Technology Center 3234

Abstract: Nanocomposites consisting of phases with fluorite (doped CeO2) and perovskite (LaMnO3, GdMnO3) structures are synthesized using the method of ester polymeric precursors (the Pechini method) and two sources of rare-earth elements (Ln), such as pure cerium and gadolinium salts or a commercial mixture of rare-earth carbonates containing La, Ce, Pr, Nd, and Sm cations. The genesis of the nanocomposite structure as a function of the sintering temperature is investigated using X-ray diffraction and electron microscopy. It is revealed that the genesis of the nanocomposite structure is governed, in many respects, by the fact that the decomposition of the ester polymeric precursor leads to the formation of a metastable phase, namely, a fluoritelike solid solution based on ceria with an excess concentration of the cations Ln3+ (Ln3+ = La3+, Pr3+, Nd3+, Sm3+) as compared to the equilibrium concentration. As a result, the perovskite phase (identified by X-ray diffraction analysis) is formed only after the subsequent annealing at temperatures higher than 800°C, when Ln3+ cations escape from particles of the solid solution. It is demonstrated that, at annealing temperatures of up to 1100°C, particles of both phases have nanometer sizes and are characterized by a uniform spatial distribution necessary for percolation. The nanocomposites possess a high total electrical conductivity and a high mobility of lattice oxygen. The reduction rate of the nanocomposites with hydrogen or methane is higher than the reduction rate of the individual phases. The characteristics of the nanocomposites prepared from the commercial mixture of rare-earth carbonates are better than those of the samples synthesized from the pure salts.
Cite: Sadykov V.A. , Borchert Y.V. , Alikina G.M. , Lukashevich A.I. , Mezentseva N.V. , Muzykantov V.S. , Moroz E.M. , Rogov V.A. , Zaikovskii V.I. , Zyuzin D.A. , Uvarov N.F. , Ishchenko A.V. , Zy'ryanov V.V. , Smirnova A.
Synthesis and Properties of Nanocomposites with Mixed Ionic–Electronic Conductivity on the Basis of Oxide Phases with Perovskite and Fluorite Structures
Glass Physics and Chemistry. 2007. V.33. N4. P.320-334. DOI: 10.1134/S1087659607040049 publication_identifier_short.wos_identifier_type publication_identifier_short.scopus_identifier_type publication_identifier_short.rinz_identifier_type
ArticleLinkType.TRANSLATED_TO_ORIGINAL: Садыков В.А. , Borchert Y.V. , Аликина Г.М. , Лукашевич А.И. , Мезенцева Н.В. , Музыкантов В.С. , Мороз Э.М. , Рогов В.А. , Зайковский В.И. , Зюзин Д.А. , Уваров Н.Ф. , Ищенко А.В. , Зырянов В.В. , Smirnova A.
Нанокомпозиты со смешанной ионно-электронной проводимостью на основе оксидных фаз со структурой перовскита и флюорита: синтез и свойства
Физика и химия стекла. 2007. Т.33. №4. С.449-469. publication_identifier_short.rinz_identifier_type
Dates:
Published print: Aug 1, 2007
Identifiers:
publication_identifier.wos_identifier_type WOS:000249259800004
publication_identifier.scopus_identifier_type 2-s2.0-34548402001
publication_identifier.rinz_identifier_type 13551121
publication_identifier.accession_number_identifier_type 2007:985996
publication_identifier.chemical_accession_number_identifier_type 148:543381
Altmetrics: