Great reduction of loss at high electric field in the polyvinylidene fluoride/aromatic polythiourea blend films along with an irreversible phase transition

Journal Article · Mon Feb 02 00:00:00 EST 2015 · Applied Physics Letters

DOI:https://doi.org/10.1063/1.4907549· OSTI ID:22420260

Jiang, Long; Li, Weiping; Zhu, Jiujun; Huo, Xiaoyun; Luo, Laihui; Zhu, Yuejin ^[1]

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1. Department of Microelectronic Science and Engineering, Faculty of Science, Ningbo University, Ningbo 315211 (China)

In this paper, the polarization response of dielectric blend based on the polyvinylidene fluoride (PVDF) and aromatic polythiourea (ArPTU) was investigated. It is found that the conduction loss at high field has been reduced 2–4 times along with an interesting irreversible transition under high electric field. The loss at 700 MV/m can be kept below 20%, which is better than most other polar dielectric polymers. It is proved that the transition is a phase change from glass phase to polar β phase at a critical field. And the highly polar thiourea groups of ArPTU can act as traps for the electrons, reduce conduction loss greatly and prevent dielectric breakdown by stabilizing the electron energy.

• OSTI ID: 22420260
• Journal Information: Applied Physics Letters, Vol. 106, Issue 5; Other Information: (c) 2015 AIP Publishing LLC; Country of input: International Atomic Energy Agency (IAEA); ISSN 0003-6951
• Country of Publication: United States
• Language: English

Related Subjects

71 CLASSICAL AND QUANTUM MECHANICS
GENERAL PHYSICS
ELECTRIC FIELDS
FILMS
ORGANIC FLUORINE COMPOUNDS
PHASE TRANSFORMATIONS
POLARIZATION
POLYVINYLS
THIOUREA