2022 Fiscal Year Final Research Report
Fabrication of Metal Matrix Piezoelectric Composite Realize Local Poling Control and New Function Expression
| Project/Area Number |
20K15053
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| Research Category |
Grant-in-Aid for Early-Career Scientists
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| Allocation Type | Multi-year Fund |
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| Review Section |
Basic Section 26040:Structural materials and functional materials-related
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| Research Institution | Kogakuin University |
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Principal Investigator |
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| Project Period (FY) |
2020-04-01 – 2023-03-31
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| Keywords | スマート材料 / 金属基圧電複合材料 / 金属基複合材料 / 分極 / センサ |
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| Outline of Final Research Achievements |
We investigated the fabrication conditions and optimized the polarization treatment of a metal matrix piezoelectric composite with multiple internal electrodes to control local area polarization. This composite material uses metal fibers with oxide films on the surface as inner electrodes, and the polarization of piezoelectric ceramics can be controlled locally by polarization treatment between these electrodes. In this study, fabrication conditions for piezoelectric ceramics with two inner electrodes were investigated and found conditions that can suppress defects. In addition, a method for optimizing polarization processing conditions using a series capacitor model was developed. As a result, it was clarified that the dielectric breakdown voltage and dielectric constant of the oxide film have a significant influence on the optimization of the polarization process.
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| Free Research Field |
スマート材料
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| Academic Significance and Societal Importance of the Research Achievements |
近年，災害等の損傷を監視する構造ヘルスモニタリングが注目を浴びている．この技術は監視対象である構造物に多数のセンサを取り付けて構造物の寿命・状態を監視している．これらのセンサは災害時の極めて高い負荷に耐えられる強度が必要であり，また，センサ数は電源および信頼性確保の観点から低減することが望ましい．これらの観点より，圧電セラミックスを金属中へ複合化することによりロバスト性を有したセンサと使用可能な金属基圧電複合材料の社会的意義は極めて高いものと言える．加えて局所的分極制御可能とすることでセンサ単体で多軸応力測定を可能としセンサ数の低減への寄与が期待できる．
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