| Project/Area Number |
22656140
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| Research Category |
Grant-in-Aid for Challenging Exploratory Research
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| Allocation Type | Single-year Grants |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | Tohoku University |
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Principal Investigator |
SEKINO Tohru 東北大学, 多元物質科学研究所, 准教授 (20226658)
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| Co-Investigator(Renkei-kenkyūsha) |
TANAKA Shun-ichiro 東北大学, 多元物質科学研究所, 教授 (00345943)
TSUKUDA Satoshi 東北大学, 多元物質科学研究所, 助教 (00451633)
KUSUNOSE Takafumi 香川大学, 工学部, 准教授 (60314423)
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| Project Period (FY) |
2010 – 2011
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| Project Status |
Completed (Fiscal Year 2011)
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| Budget Amount *help |
¥3,590,000 (Direct Cost: ¥3,200,000、Indirect Cost: ¥390,000)
Fiscal Year 2011: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
Fiscal Year 2010: ¥1,900,000 (Direct Cost: ¥1,900,000)
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| Keywords | セラミックス / ナノ材料 / 表面・界面物性 / 半導体物性 / 自己組織化相分離 / スピノーダル / ナノ構造・界面形成 / 酸化スズ・酸化チタン |
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| Research Abstract |
SnO_2-TiO_2 binary system is well known to exhibit an absolute solid solution and spinodal decomposition with characteristic lamellar structure. Such a phase separation is expected to forms self-organized structure with coherent and clean interface between different phases in nanometer scale. In this study, trivalent Fe^<3+> ion was doped to the system in order to control the both microstructures and electrical properties simultaneously. Through the experimental work, it was firstly revealed that self-organized phase-separation with characteristic periodic ordered-structure could be successfully obtained for the as-sintered samples without any annealing. The characteristic phase-separated microstructures and properties by doping to the binary oxide system was caused by the thermodynamical control of the system. It is thus concluded that the present materials design is useful and expectable to develop new-type of ceramic composite with nano-scaled hetero-structures.
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