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New High-Dielectric-Constant Polymer-Ceramic Composites

Published online by Cambridge University Press:  01 February 2011

Milind Arbatti ,
Xiaobing Shan  and
Z.-Y. Cheng
Milind Arbatti
Affiliation:
Materials Research and Education Center, Auburn University, Auburn, AL 36849
Xiaobing Shan
Affiliation:
Materials Research and Education Center, Auburn University, Auburn, AL 36849
Z.-Y. Cheng
Affiliation:
Materials Research and Education Center, Auburn University, Auburn, AL 36849
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Abstract

A ceramic-powder polymer composite, making use of a newly developed ceramics - CaCu3Ti4O12 (CCTO) - that has a giant dielectric constant as the filler, is developed. In this work, poly(vinylidene fluoride - trifluoroethylene) [P(VDF-TrFE)] 55/45 mol% copolymer was used as matrix. It is found that the wettability between the copolymer and CCTO is poor, which makes the solution cast composites have a poor uniformity. The uniformity and thus the dielectric constant of the composites can be significantly improved by using hot-press technology to form “sandwich” structure. It is also found that the thermal annealing process can improve the dielectric constant of the composite. The experimental data show that for the flexible composites the dielectric constant at 1 kHz can reach more than 300 at room temperature and more than 700 at ∼70 °C.

Type
Research Article
Information
MRS Online Proceedings Library (OPL) , Volume 847: Symposium EE – Organic/Inorganic Hybrid Materials , 2004 , EE13.58
Copyright
Copyright © Materials Research Society 2005

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