The origin of ultrahigh piezoelectric response（课题组在Nature Communications期刊上发表研究论文）
- 发布时间：
- 2017-01-10
- 文章标题：
- The origin of ultrahigh piezoelectric response（课题组在Nature Communications期刊上发表研究论文）
- 内容：
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All ferroelectric materials possess a property known as piezoelectricity in which an applied mechanical force can generate an electrical current and an applied electrical field can elicit a mechanical response. Ferroelectric materials are used in a wide variety of industrial applications, from ultrasound and sonar to capacitors, transducers, vibration sensors and ultrasensitive infrared cameras. Now, an international team of scientists led by Penn State may have solved the 30-year-old riddle of why certain ferroelectric crystals exhibit extremely strong piezoelectric responses.
In 1997, a relaxor-ferroelectric solid solution crystal with the highest known piezoelectric response was reported at Penn State by Thomas R. Shrout, currently senior scientist and professor of materials science and engineering at Penn State, and the late Seung-Eek Park. It has a piezoelectric response five to ten times higher than any other known ferroelectric material. “There have been a number of mechanisms proposed to explain its ultrahigh piezoelectric responses, but none of them offer a satisfactory explanation for all the experimental observations and measurements associated with the high response. Without a firm understanding of the underlying mechanism, it would be difficult to design new materials with even higher piezoelectric response,” said Fei Li, a postdoctoral scholar in materials science and engineering at Penn State and lead author of a recent article in the journal Nature Communications ("The Origin of Ultrahigh Piezoelectricity in Relaxor-Ferroelectric Solid Solution Crystals") attempting to explain the phenomenon. Introduced by Phys.org. https://phys.org/news/2017-01-ultrahigh-piezoelectric-response.html
Introduced by MRS Bulletin with a title of "Impact of local structure on ultrahigh piezoelectricity quantified"