| Project/Area Number |
59430014
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| Research Category |
Grant-in-Aid for General Scientific Research (A)
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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 | Toyohashi University of Technology |
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Principal Investigator |
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| Project Period (FY) |
1984 – 1985
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| Project Status |
Completed (Fiscal Year 1985)
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| Budget Amount *help |
¥20,500,000 (Direct Cost: ¥20,500,000)
Fiscal Year 1985: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1984: ¥19,500,000 (Direct Cost: ¥19,500,000)
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| Keywords | Carbon Materials / Texture / Fracture Behaviour / 電極反応 |
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| Research Abstract |
1. Formation and control of texture
New classification of microtexture in carbon materials based on crystallite orientation was proposed. By carbonizing the mixtures of pitch with phenol resin or polyvinylchloride under pressure, optical texture of the resultant carbons and particle morphology can be controlled in a wide range. Rheological parameters of pitches depend strongly on their molecular weight and change remarkably by mixing with carbon black particles.
2. Fracture behaviour
Carbon materials show remarkable non-linearity during crack propagation. This non-linear fracture behaviour is analyzed on the basis of energetics and the experimental determination technique of various fracture parameters was established. Energy dissipation during crack propagation is mainly due to microcracking, and very large size process zone and process zone wake has to be taken into account for the analysis of fracture behaviour of carbon materials. Microcracking depended strongly on texture and so on the heat-treatment temperature and size of filler coke particles in the carbon materials.
3. Electrode reaction
Various carbon fibres ( vapor-grown, mesophasepitch based and PAN based fibres ) with various heat-treatment temperatures are used as electrode in concentric sulfuric acid. Intercalation and de-intercalation of sulfuric acid into graphite layers in the carbon fibres depended not only on the crystallinity of the fibre but also on the microtexture in the fibre; well-oriented texture being preferable for intercalation and de-intercalation.
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