| Project/Area Number |
26410078
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Multi-year Fund |
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| Section | 一般 |
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| Research Field |
Inorganic chemistry
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| Research Institution | Tokai University |
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Principal Investigator |
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| Research Collaborator |
INAGUMA Yoshiyuki 学習院大学, 理学部, 教授
MORI Daisuke 学習院大学, 理学部, 助教
MIYMOTO Yasuo 東海大学, 技術共同管理室, 室長
HARAKI Takeshi
KURAYA Ryosyke
SAWADA Nobuhiro
MIWA Hidehiro
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| Project Period (FY) |
2014-04-01 – 2017-03-31
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| Project Status |
Completed (Fiscal Year 2016)
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| Budget Amount *help |
¥5,200,000 (Direct Cost: ¥4,000,000、Indirect Cost: ¥1,200,000)
Fiscal Year 2016: ¥390,000 (Direct Cost: ¥300,000、Indirect Cost: ¥90,000)
Fiscal Year 2015: ¥520,000 (Direct Cost: ¥400,000、Indirect Cost: ¥120,000)
Fiscal Year 2014: ¥4,290,000 (Direct Cost: ¥3,300,000、Indirect Cost: ¥990,000)
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| Keywords | 酸フッ化物 / ペロフスカイト / 強誘電体 / 構造相転移 / リラクサー / 複合アニオン化合物 / 誘電性 / 放射光 / 結晶構造 |
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| Outline of Final Research Achievements |
(1-x)KNbO3-xKMgF3 was synthesized using a sealed silica tube with an oxygen generator (KNMOF-O2) and high-pressure and high-temperature apparatus (KNMOF-hp) and the variations of the crystal structure with phase transition and the dielectric properties were investigated. By high- and low-temperature X-ray diffraction, it was found that the phase transition temperatures varies with increasing x and structural change with the phase transitions were ambiguous and dispersive in wide temperature range. However, the phase transition temperatures were almost constant for x=0.05 and did not merged. In the temperature dependence of the dielectric permittivity, the broad maximum was observed in the vicinity of 400 K for x=0.05 (KNMOF-hp) and its value reached an approximately 2200, which is higher than that of the orthorhombic phase of KNbO3 dense ceramics.
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