| Project/Area Number |
05650643
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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 |
Inorganic materials/Physical properties
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| Research Institution | University of Osaka Prefecture |
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Principal Investigator |
TATSUMISAGO Masahiro Univ.Osaka Pref., Assoc.Prof.Coll of Eng., 工学部, 助教授 (50137238)
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| Project Period (FY) |
1993 – 1994
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| Project Status |
Completed (Fiscal Year 1994)
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| Budget Amount *help |
¥2,200,000 (Direct Cost: ¥2,200,000)
Fiscal Year 1994: ¥500,000 (Direct Cost: ¥500,000)
Fiscal Year 1993: ¥1,700,000 (Direct Cost: ¥1,700,000)
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| Keywords | Functional crystal / Amorphous / Composite / Matrix / Glass / Fine particlers / Ion conduction / Phase transformation / 〓〓〓〓〓 |
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| Research Abstract |
Several new crystal-amorphous composites which exhibit high ionic conductivity, photochromism, etc. were prepared by using some sophosticated techniques like twin-roller quenching and the sol-gel method. The following results were obtained.
1) Superionic composites composed of alpha-Agl crystal and Agl-Ag_2O-M_xO_y glass were prepared by twin-roller quenching of the Agl-Ag_2O-M_xO_y melts with high concentration of Agl. The FE-SEM observation indicated that fine particles of alpha-Agl with several ten nanometers in diameter were uniformly dispersed in the glass matrices.
2) Photochromic composites composed of heteropolyacids/viologens and silica gels were prepared by the sol-gel method. The colored species formed by the reduction of heteropolyacids/viologens were stabilized in the course of sol-gel transformation.
3) Proton-conductive composites composed of bronsted acids and silica gels were prepared by the gol-gel method. The conductivities of such composites were as high as 10^<-4>-10^<-1> Scm^<-1> at room temperature.
3) Auramine 0 (Au0), one of the microviscosity proves, was doped in the silica sols and the emission behavior was monitored in the course of sol-gel transformation and aging and drying of the wet-gels. The microviscosity surround Au0 did not change at the gelation point and steeply increased in the drying process.
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