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Insights into Performance Stability of Lead-free Piezoelectric Ceramic
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| 자료유형 | 학위논문 |
|---|---|
| 서명/저자사항 | Insights into Performance Stability of Lead-free Piezoelectric Ceramic. |
| 개인저자 | Fan, Zhongming. |
| 단체저자명 | Iowa State University. Materials Science and Engineering. |
| 발행사항 | [S.l.]: Iowa State University., 2019. |
| 발행사항 | Ann Arbor: ProQuest Dissertations & Theses, 2019. |
| 형태사항 | 124 p. |
| 기본자료 저록 | Dissertations Abstracts International 81-04B. Dissertation Abstract International |
| ISBN | 9781088309797 |
| 학위논문주기 | Thesis (Ph.D.)--Iowa State University, 2019. |
| 일반주기 |
Source: Dissertations Abstracts International, Volume: 81-04, Section: B.
Advisor: Tan, Xiaoli. |
| 이용제한사항 | This item must not be sold to any third party vendors. |
| 요약 | Developing materials with superior functional properties is the primary goal of materials engineering. Nonetheless, the stability of performance during practical service should be of equal importance. This is, with no doubt, also true for piezoelectric materials. The working conditions of piezoelectric materials can lead to either gradual or abrupt degradation in their functional properties. First, fatigue. In analogy to structural materials under cyclic stresses, the piezoelectric properties deteriorate during the electric field cycling. Second, aging. While the service is paused and the piezoelectric material is sitting idle, the piezoelectric properties will decay over time. Third, thermal depolarization. Electronic devices are not necessarily working at room temperature. The piezoelectric properties may fluctuate with temperature change, or even vanish above a threshold value. These three major forms of performance instability of piezoelectric materials have been studied for decades. Exploring the microstructural origins can help to find approaches to mitigate the degradation. The current dissertation aims to investigate the micromechanisms of electric fatigue, polarization aging, and thermal depolarization in lead-free piezoelectric ceramics. Electric field in-situ transmission electron microscopy (TEM) is utilized to directly monitor the microstructure evolution during electric cycling, aging, and temperature rise. |
| 일반주제명 | Materials science. Ceramics. |
| 언어 | 영어 |
| 바로가기 | 
: 이 자료의 원문은 한국교육학술정보원에서 제공합니다. |
