A Novel Approach to Large Strain in Ferroelectrics (2/2)
Date Issued
2002-07-31
Date
2002-07-31
Author(s)
DOI
902212E002189
Abstract
強電性材料乃主動材料中的一種，具有多種相變狀態和由此引發的非線性現象。
經由微觀結構或晶域排列的控制，超大應變之開發是極具可行性。本研究計劃藉
由能量最小原理，成功發展出一理論模型來解釋強電性材料的行為。透過此一模
型，吾人可預測單晶強電材料之晶域排列與其宏觀行為。我們證明晶域轉變所需
之最小能量路徑與超大應變致動器開發亦可由本模型求得，同時我們發現所得之
結果與實驗觀察之應變非常吻合。
Subjects
Ferroelectrics are one of active materials which can
exploit various phase transformations and other in-
herently nonlinear phenomenon. This gives rise to
unusually large strain by manipulating their mi-
crostructure or domain patterns via electric eld and
load. We have developed a model to study the be-
havior of ferroelectrics based on energy minimization.
Using this model
exploit various phase transformations and other in-
herently nonlinear phenomenon. This gives rise to
unusually large strain by manipulating their mi-
crostructure or domain patterns via electric eld and
load. We have developed a model to study the be-
havior of ferroelectrics based on energy minimization.
Using this model
we have examined the domain pat-
terns and the macroscopic behavior of single crystals
of ferroelectric material. A low-energy path is iden-
tied for domain switching and a novel conguration
that yields very large electrostriction is identied.
terns and the macroscopic behavior of single crystals
of ferroelectric material. A low-energy path is iden-
tied for domain switching and a novel conguration
that yields very large electrostriction is identied.
Publisher
臺北市：國立臺灣大學應用力學研究所
Type
report
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