| Project/Area Number |
06453119
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| Research Category |
Grant-in-Aid for General Scientific Research (B)
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| Allocation Type | Single-year Grants |
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| Research Field |
無機工業化学
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| Research Institution | Tokyo Institute of Technology |
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Principal Investigator |
KAKIHANA Masato Tokyo Institute of Technology, Research Laboratory of Engineering Materials, Associate Professor, 工業材料研究所, 助教授 (50233664)
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| Project Period (FY) |
1995 – 1996
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| Project Status |
Completed (Fiscal Year 1995)
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| Budget Amount *help |
¥7,100,000 (Direct Cost: ¥7,100,000)
Fiscal Year 1995: ¥1,100,000 (Direct Cost: ¥1,100,000)
Fiscal Year 1994: ¥6,000,000 (Direct Cost: ¥6,000,000)
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| Keywords | Ionomer / Functional ceramics / Chemical design / Chemical process / Polymerized complex method / Polymer metal complex |
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| Research Abstract |
Central in the present work is to prepare homogeneous multicomponent gel precursors for the synthesis of various advanced ceramic materials at reduced temperatures. To reach this goal, studies under the many aspects ranging from the basic aspects of the solution chemistry closely connected to metal-chelate complex formations in various solvents to the polymer science including the field of the gel science have been systematically carried out. Of particular importance is how to prepare hetero-metallic complexes with a desired stoichiometry as a suitable molecular precursor for ceramic materials. Various spectroscopic techniques involving Raman, infrared and NMR were used as tools to gain insight into molecular species or bonding type that are formed either in a starting solution or in a polymeric product. Another important part of the work is to study the evolution of structure during the heat treatment of the gel precursors. This also was done using the above listed spectroscopic techn
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iques as well as X-ray diffraction techniques. The main results obtained were summarized as below :
1) Heterometallic complexes were designed in various M-Ti-citric acid (CA) systems, where M=Ba, Sr, Pb, and Y.A unique method for the identification of heterometallic complexes in solutions was established by employing ^<13>C-NMR spectroscopy. Polyesterification between ethyleneglycol and CA was carried out in the presence of these complexes in order to obtain homogeneous multi-component gels.
2) Structural evolution of multi-component ceramics was studied by use of Raman and NMR spectroscopies. Characterization of the final product was developed mainly by Raman scattering and X-ray diffraction techniques. Particular attention was paid to determining conditions of reducing the synthesis temperatures.
3) Overall outcome : A scheme to prepare homogeneous multicomponent gel precursors, that can be used for the high-pure synthesis of multi-component ceramics at reduced temperatures was built up. Less
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