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Ferroelectrics Volume 261, 2001 - Issue 1
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Session C: Relaxor ferroelectrics

Abnormal ferroelectric relaxation in electron-irradiated copolymers of vinylidenefluoride and trifluoroethylene

Zhang Desheng Functional Materials Research Laboratory, Tongji University, Shanghai, 200092, China
,
Shen Bo Functional Materials Research Laboratory, Tongji University, Shanghai, 200092, China
,
Yao Xi Functional Materials Research Laboratory, Tongji University, Shanghai, 200092, China
,
Chen Xiaogang Functional Materials Research Laboratory, Tongji University, Shanghai, 200092, China
,
Yi Wenhui Functional Materials Research Laboratory, Tongji University, Shanghai, 200092, China
&
Zhang Liangying Functional Materials Research Laboratory, Tongji University, Shanghai, 200092, China
Pages 53-58 | Received 03 Aug 2001, Published online: 25 Oct 2011
 
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Abstract

A series of copolymers of vinylidene fluoride (VDF) and trifluoroethylene (TrFE) containing 52-80 mol% VDF have been investigated. The properties of unirradiated and irradiated samples are compared and an abnormal ferroelectric relaxation is observed. Electron irradiation largely changes their properties. An abnormal ferroelectric relaxation is observed in the copolymer containing 80 mol% VDF, in which Curie peak shifts to low temperature with increase of measuring frequency, that is different of the other two kinds of copolymer which show obvious ferroelectric relaxation properties.

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