| Project/Area Number |
04680058
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| Research Category |
Grant-in-Aid for General Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Research Field |
結晶学
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| Research Institution | Doshisha University |
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Principal Investigator |
HIROTA Ken Faculty of Engineering, Doshisha University, Associate Professor, 工学部, 助教授 (30238414)
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| Co-Investigator(Kenkyū-buntansha) |
YAMAGUCHI Osamu Faculty of Engineering, Doshisha University, Professor, 工学部, 教授 (40097861)
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| Project Period (FY) |
1992 – 1993
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| Project Status |
Completed (Fiscal Year 1993)
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| Budget Amount *help |
¥1,700,000 (Direct Cost: ¥1,700,000)
Fiscal Year 1993: ¥400,000 (Direct Cost: ¥400,000)
Fiscal Year 1992: ¥1,300,000 (Direct Cost: ¥1,300,000)
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| Keywords | Alkoxide / Perovskite / Magnesium / Niobium / Lead / Oxide / ニオブ |
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| Research Abstract |
As the 1st step of synthesis for lead magnesium niobate, formation of magnesium niobate as a precursor was investigated. A new modification of MgNb_2O_6 was crystallized at 510ﾟ - 550ﾟC from amorphous material prepared by the simultaneous hydrolysis of magnesium ethoxide and niobium ethoxide.
To obtain high dielectric constant at room temperature, the ceramics with the composition of 0.9Pb(Mg_<1/3>Nb_<2/3>)O_3-0.1PbTiO_3 was fabricated using powders prepared by the alkoxy-method. The ceramics sintered at 1250ﾟC with the densities >98 % T.D.consisted of grains of 1 - 6mum in size. The dielectric constant of the ceramics showed the values between 7000 and 2500 at 1 kHz.
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