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Preparation of functionally graded glass by the ultracentrifuge method combined with sol-gel method and the physical properties.

Research Project

Project/Area Number 12555180
Research Category

Grant-in-Aid for Scientific Research (B)

Allocation TypeSingle-year Grants
Section展開研究
Research Field Composite materials/Physical properties
Research InstitutionKumamoto University

Principal Investigator

MASHIMO Tsutomu  Kumamoto University, Shock Wave and Condensed Matter Research Center, Associate Professor, 衝撃・極限環境研究センター, 助教授 (90128314)

Co-Investigator(Kenkyū-buntansha) IHARA Hirotaka  Kumamoto University, Faculty of Engineering, Professor, 工学部, 教授 (10151648)
Project Period (FY) 2000 – 2002
Project Status Completed (Fiscal Year 2002)
Budget Amount *help
¥9,500,000 (Direct Cost: ¥9,500,000)
Fiscal Year 2002: ¥1,400,000 (Direct Cost: ¥1,400,000)
Fiscal Year 2001: ¥4,400,000 (Direct Cost: ¥4,400,000)
Fiscal Year 2000: ¥3,700,000 (Direct Cost: ¥3,700,000)
KeywordsUltracentrifuge / Sol-Gel method / Sedimentation / Functionally graded materials / Glass / Diffusion / Colloid / Ceramics
Research Abstract

It is expected that sedimentation of colloid particles can easily occur in liquid (sol) under a comparatively low gravity field due to the large molecular weigh, although a very high acceleration field of the order of 1 million g was necessary to induce the sedimentation of atoms. We can manufacture glass by sol-gel method at lower temperatures than the melting method. The purpose of this study is to prepare the graded glass in molecular-scale by the ultracentrifuge method combined with sol-gel method, and to access the physical properties
In 2000, we produced an ultracentrifuge which can generate acceleration field up to 30,000 G at 40-80 ℃ in large specimen cylindrical capsules whose axis is coincide with the ultrcentrifuge direction. The graded glass in SiO_2-TiO_2 system was for the first time prepared. In 2001, the proper condition to prepare the graded bulk glass was examined especially focusing on The growth time of colloids before the centrifugation. A transparent SiO_2-TiO_2 glass with molecular-scale graded structure was obtained through many trials. The graded structure in molecular scale is confirmed by XRD and EPMA methods. We observed the infra-red absorption spectra at many points along acceleration field, and confirmed the graded structure in molecular-scale. In 2002, we tried to prepare the molecular-scale graded glass in ZrO_2-SiO_2, Al_2O_3-SiO_2, B_2O_3-SiO_2, V_2O_3-SiO_2 systems, etc., and succeeded in ZrO_2-SiO_2, Al_2O_3-SiO_2 systems. The number of crack of the graded glass was reduced by many trial of sol-gel process. It was confirmed that the graded or composite bulk or film glass in molecular-scale could be fabricated by the ultracentrifuge method combined with sol-gel method. We are going to proceed this research to prepare the functional graded materials for industry.

Report

(4 results)
  • 2002 Annual Research Report   Final Research Report Summary
  • 2001 Annual Research Report
  • 2000 Annual Research Report
  • Research Products

    (12 results)

All Other

All Publications (12 results)

  • [Publications] 西原正通, 真下茂ほか: "高重力とゾルゲル法を用いたSiO_<2^->TiO_2系傾斜ガラスの作製"粉体および粉末冶金. 47. 1201-1204 (2000)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] R.Nishimura, T.Mashimo, et al.: "Molecular graduation in glass by using high gravity -Novel method of Si-Ti graded glass"Processing by Centrifugation, (Kluwer Academic, 2001. 159-162 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] T.Mashimo, R.Nishimura, et al.: "Preparation of functionally graded oxide glass in molecular scale"J.Mater.Sci.Lett.21,1691-1693(2002). 21. 1691-1693 (2001)

    • Description
      「研究成果報告書概要(和文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Tsutomu MASHIMO, Rika NISHIMURA, Susumu MATSUZAKI, Masamichi NISHIHARA, Takashi SAGAWA and Hirotaka IHARA: "Preparation of functionally graded oxide glass in molecular scale"J. Mater. Sci. Lett.. 21. 1691-1693 (2002)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] Masamichi NISHIHARA, Hirotaka IHARA, Takashi SAGAWA, Rika NISHIMURA, Susumu MATSUZAKI and Tsutomu MASHIMO: "Molecular graduation in glass by using high gravity -Novel method of Si-Ti graded glass preparation-, Processing by Centrifigation"Kluwer Academic. 159-162 (2001)

    • Description
      「研究成果報告書概要(欧文)」より
    • Related Report
      2002 Final Research Report Summary
  • [Publications] 西原正通, 真下茂, ほか: "高重力とゾルゲル法を用いたSiO_2-TiO_2系傾斜ガラスの作製"粉体および粉末冶金. 47. 1201-1204 (2000)

    • Related Report
      2002 Annual Research Report
  • [Publications] R.Nishimura, T.Mashimo, et al.: "Molecular graduation in glass by using high gravity Novel method of Si-Ti graded glass"Processing by Centrifugation, (Kluwer Academic, 2001. 159-162 (2001)

    • Related Report
      2002 Annual Research Report
  • [Publications] T.Mashimo, R.Nishimura, et al.: "Preparation of functionally graded oxide glass in molecular scale"J. Mater. Sci. Lett. 21, 1691-1693 (2002). 21. 1691-1693 (2002)

    • Related Report
      2002 Annual Research Report
  • [Publications] 西原正通, 真下茂, 他: "高動場とゾル・ゲル法を用いたSiO_2-TiO_2系傾斜ガラスの作製"粉体および粉末冶金. 47. 1201-1204 (2000)

    • Related Report
      2001 Annual Research Report
  • [Publications] 西原正通, 真下茂, 他: "Molecular graduation in glass by using Rgh gravity -Novel method of Si-Ti graded glass preparation-"Centrifugal Materials Processing IV. 159-161 (2002)

    • Related Report
      2001 Annual Research Report
  • [Publications] 西原正通,真下茂 他: "高重力場とゾル・ゲル法を用いたSiO_2-TiO_2系傾斜ガラスの作製"粉体および粉末冶金. 47. 1201-1204 (2000)

    • Related Report
      2000 Annual Research Report
  • [Publications] 西原正通,真下茂 他: "Molecular graduation in glass by using high gravity-Novel method of Si-Ti graded glass preparation-"Centrifugal Materials Processing IV. (in press).

    • Related Report
      2000 Annual Research Report

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Published: 2000-04-01   Modified: 2016-04-21  

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