Microelectromechanics for the Nonlinear Response and Fracture of Ferroelectric Ceramics

铁电陶瓷非线性响应和断裂的微机电

• 批准号: 9813022
• 负责人: Robert McMeeking
• 金额: --
• 依托单位: University of California-Santa Barbara
• 依托单位国家: 美国
• 项目类别: Continuing grant
• 财政年份: 1998
• 资助国家: 美国
• 起止时间: 1998-09-01 至 2003-08-31
• 项目状态: 已结题
• 来源: https://www.nsf.gov/awardsearch/showAward?AWD_ID=9813022&HistoricalAwards=false
• 关键词: Microelectromechanics; Nonlinear; Response; Fracture; Ferroelectric

9813022 McMeeking The microelectromechanics of perovskite ferroelectric ceramics (PFC) and single crystals is investigated. Simple experiments are conducted to study the swithcing response of polycrystalline and single crystal PFCs in the presence of simulataneous electric field and mechanical stress. Models for nonlinear behavior of PFC combined with the experimental data are used to develop phenomenological constitutive laws to predict the response of polycrystalline ceramics and single crystals. A fracture mechanics approach for PFCs is also developed. ***

研究了钙钛矿铁电陶瓷（PFC）和单晶的微电力学性质。通过简单的实验研究了多晶和单晶PFCs在电场和机械应力同时存在下的开关响应。结合实验数据，建立了PFC的非线性行为模型，建立了多晶和单晶响应的现象学本构定律。本文还发展了PFCs的断裂力学方法。＊＊＊