Piezoresistivity of magnesia-graphite composite ceramics
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- WAKU Kiminori
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
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- TAGAYA Shuuhei
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
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- HAYASHI Hidetaka
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
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- KISHIMOTO Akira
- Division of Chemistry and Biochemistry, Graduate School of Natural Science and Technology, Okayama University
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Abstract
Magnesia-graphite composite ceramics were fabricated by hot pressing in Ar atmosphere, and their electrical properties were measured. The electrical resistivity increases as the graphite volume fraction x decreases, following well-accepted power law model based on the percolation theory. Renormalized pressure coefficient of resistance, d(ln R)/dP, decreases as x decreases. This behavior can be explained by the strong enhancement of d(ln ρ)/dx toward the percolation threshold. By fitting the x dependence of d(ln R)/dP with a theoretical equation, the Young's modulus of the composites was estimated.
Journal
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- Journal of the Ceramic Society of Japan
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Journal of the Ceramic Society of Japan 117 (1367), 793-796, 2009
The Ceramic Society of Japan
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Details 詳細情報について
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- CRID
- 1390001205284329216
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- NII Article ID
- 10025968435
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- NII Book ID
- AA12229489
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- ISSN
- 13486535
- 18820743
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- NDL BIB ID
- 10265474
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- Text Lang
- en
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- Data Source
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- JaLC
- NDL
- Crossref
- CiNii Articles
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- Abstract License Flag
- Disallowed