| Project/Area Number |
10650660
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| Research Category |
Grant-in-Aid for Scientific Research (C)
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| Allocation Type | Single-year Grants |
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| Section | 一般 |
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| Research Field |
Inorganic materials/Physical properties
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| Research Institution | YAMAGATA UNIVERSITY |
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Principal Investigator |
HIROSE Seiji YAMAGATA UNIVERSITY FACULTY OF ENGINEERING,PROFESSOR, 工学部, 教授 (70007201)
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| Co-Investigator(Kenkyū-buntansha) |
TAKAHASHI Sadayuki NEC CORP., SENIOR RESEARCHER, 研究開発グループ, 主席研究員
AOYAGI Manabu YAMAGATA UNIVERSITY FACULTY OF ENGINEERING,ASSISTANT, 工学部, 助手 (80231786)
TOMIKAWA Yoshiro YAMAGATA UNIVERSITY FACULTY OF ENGINEERING,PROFESSOR, 工学部, 教授 (80007004)
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| Project Period (FY) |
1998 – 2000
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| Project Status |
Completed (Fiscal Year 2000)
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| Budget Amount *help |
¥3,500,000 (Direct Cost: ¥3,500,000)
Fiscal Year 2000: ¥700,000 (Direct Cost: ¥700,000)
Fiscal Year 1999: ¥1,000,000 (Direct Cost: ¥1,000,000)
Fiscal Year 1998: ¥1,800,000 (Direct Cost: ¥1,800,000)
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| Keywords | PIEZO-TRANSDUCER / HIGH POWER / MECHANICAL LOSS / DIELECTRIC LOSS / MEASURING SYSTEM |
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| Research Abstract |
This study aimed the establishment of the measurement system both for the mechanical-vibration loss and the dielectric loss of the piezoelectric transducer. In the system, automatic measurement is adopted by using the computer control.
Following results have been obtained through three years' investigations.
1.Losses are expressed and separated to two kind of losses ; that is, mechanical-vibration loss and dielectric loss. These have been obtained by introducing the elastic loss angle and the dielectric loss angle into the input electrical admittance.
2.Improved measurement system has been made and it's operations have been checked and confirmed. By using this system, piezoelectric and vibrational characteristics have been obtained easily up to high power level.
3.Two losses of the piezoelectric transducer have been obtained in increasing the vibration amplitude. From these results, it has been clarified that the dielectric loss becomes dominant with increasing vibration amplitude, therefore, under high vibration level, the dielectric loss becomes much larger than the mechanical vibration loss.
4.Those results can be utilized effectively for the development of the new advanced piezoelectric ceramic materials, and also utilized for the precise design of the piezoelectric transformers which are applied for the power electric sources.
Those contents mentioned above have been published and presented at the symposia and the technical meetings.
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