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Glycothermal Synthesis of Thermodynamically unstable Mixed Oxides

Research Project

Project/Area Number 09650922
Research Category

Grant-in-Aid for Scientific Research (C)

Allocation TypeSingle-year Grants
Section一般
Research Field 無機工業化学
Research InstitutionKYOTO UNIVERSITY

Principal Investigator

INOUE Masashi  Graduate School of Engineering, Kyoto University, Associate Professor, 工学研究科, 助教授 (30151624)

Project Period (FY) 1997 – 1998
Project Status Completed (Fiscal Year 1998)
Budget Amount *help
¥2,800,000 (Direct Cost: ¥2,800,000)
Fiscal Year 1998: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1997: ¥1,800,000 (Direct Cost: ¥1,800,000)
KeywordsGlycothermal reaction / Metastable Phase / Mixed Oxide / Ultrafaine Particles / Solid Solution / Surface Energy / Crystal Growth / Coltoidal Solution / 表面積 / グリコサーマル法 / 希土類 / 欠陥
Research Abstract

This research has been carried out show that the glycothermal reaction, which this researcher has developed to synthesis nanocrystals of various metal oxides, can be applied for the synthesis of the metastable metal oxides. In 1997, the reaction mechanisms for the formation of hexagonal LnFeOィイD23ィエD2 by the reaction of iron acetylacetonate with rare earth acetates was examined in detail and the following points were found : (1) Reactivity of the starting material was controlled by the thermal stability of the ligand. (2) Higher reaction temperature increases the instability of hexagonal LnFeOィイD23ィエD2 and therefore increases the solubility of the phase resulting in an increase in the particle size of the product. (3) When the reaction was carried out in the presence of a small amount of garnet crystals, hexagonal LnFeOィイD23ィエD2 was not formed but rare earth iron garnet was formed. It was concluded that the prime factor for the formation of the metastable phase is the thermodynamical i … More nstability of the glycoxide intermediate, which gives large driving force for the formation of the final product. In 1998, the reaction of indium alkoxide with rare earth acetates, the reaction of aluminum isopropoxide with gallium acetylacetonate, and the reaction of titanium alkoxide with tetraethyl silicate were examined. The first reaction yielded the InィイD22ィエD2OィイD23-ィエD2LnィイD22ィエD2OィイD23ィエD2 solid solutions but metastable unidentified phases were also formed. The second reaction afforded large-surface area alumina-gallium oxide solid solutions having a crystal structure of metastable γ-alumina. The last reaction yielded a titania-silica solid solution having the anatase crystal structure. In this reaction, the sold solution with quite a large surface area was obtained by lowering the reaction temperature. During the course of the work mentioned above, this researcher also examined the reaction of cerium metal in 2-ethoxyethanol and found that the reaction afford a transparent colloidal solution of ultrafine ceria particles (2 nm diameter). One of the reason why this reaction afforded ceria having unique properties was that the oxidation of cerium metal gave quite a large driving force to the reaction. Less

Report

(3 results)
  • 1998 Annual Research Report   Final Research Report Summary
  • 1997 Annual Research Report
  • Research Products

    (23 results)

All Other

All Publications (23 results)

  • [Publications] M.Inoue: "Organic Derivative of Layered Inorganies Having the Second Satage Structure"Chem.Mater. 9. 1614-1619 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Glyeo Thermal Reaction of Rare Earth Acetate and Iron Acetylatetonate Formation of Hexagonal ReFeO_3"J.Am.Ceram.Soc.. 80. 2157-2160 (1997)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Solpolhermal Synthesis of Large Surface Area Zireonia"Res.Chem.Intermed.. 24. 571-579 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Glycothermal Synthesis of Rare Earth Iron Garnets"J.Mater.Res.. 13. 856-860 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Synthesis of Rare-Earth Gallium Garnet by the Glycothermal Method."J.Am.Geram.Soc.. 81. 1173-1183 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Reaction of Rare Earth Acetates with Aluminum Isopropoxide in Etlylene Glycoli Synthesis of the Garnet and Monoclinic Phases of Rare Earth・・・"J.Mater.Sci. 33. 5835-5841 (1998)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Transparent Colloidal Solution of Znm Ceria Particles"Chem.Commun. 957-958 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Glycothermal Synthesis of Metastable Phases"Adv.Sci.Technol. 14. 41-48 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Synthesis of Alkoaslumoxane by Dxidation of Alumium Metal in Alcohol"Adv.Sci.Technol. 16. 593-598 (1999)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue: "Alkosyalumoxane"Chem.Mater.. 12. 55-61 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Organic Derivative of Layered Inorganics Having the Second Stage Structure"Chem. Mater.. 9. 1614-1619 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Glycothermal Reaction of Rare Earth Acetate and Iron Acetylacetonate : Formation of Hexagonal REFeOィイD23ィエD2"J. Am. Ceram. Soc.. 80. 2157-2160 (1997)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Solvothermal Synthesis of Large Surface Area Zirconia"Res. Chem. Intermed.. 24. 571-579 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Glycothermal Synthesis of Rare Earth hon Garnets"J. Mater. Res.. 13. 856-860 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Synthesis of Rare-Earth Gallium Garnet by the Glycothermal Method"J. Am. Ceram. Soc.. 81. 1173-1183 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Reaction of Rare Earth Acetates with Aluminum Isopropoxide in Ethylene Glycol : Synthesis of the Garnet and Monoclinic Phases of Rare Earth Aluminuates"J. Mater. Sci.. 33. 5835-5841 (1998)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Transparent Colloidal Solution of 2 nm Ceria Particles"Chem. Commun.. 957-958 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Glycothermal Synthesis of Metastable Phases"Adv. Sci. Technol.. 14. 41-48 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Synthesis of Alkoxyalmoxane by Oxidation of aluminum metal in alcohols"Adv. Sci. Technol.. 16. 593-598 (1999)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M. Inoue: "Alkoxyalumoxanes"Chem. Mater.. 12. 55-61 (2000)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      1998 Final Research Report Summary
  • [Publications] M.Inoue ら: "Glycothermal Synthesis of Alumina-Gallia Salid Solution" Catalysis Letters.(発表予定).

    • Related Report
      1998 Annual Research Report
  • [Publications] M.Inoue ら: "Transparent colloidal solution of 2nm particles of ceria" Chemical Communications.(発表予定).

    • Related Report
      1998 Annual Research Report
  • [Publications] Masashi INOUE ら: "Glycothermal Synthesis of Rare Earth Iron Garnets" J.Mater,Res.13、4(発表予定). (1998)

    • Related Report
      1997 Annual Research Report

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Published: 1997-04-01   Modified: 2016-04-21  

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