High-dielectric-constant ceramic-powder polymer composites

Y. Bai, Z. Y. Cheng, V. Bharti, H. S. Xu, Q. M. Zhang

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A ceramic-powder polymer composite, making use of a relaxor ferroelectric polymer that has a high room-temperature dielectric constant as the matrix, is developed. The experimental data show that the dielectric constant of the composites with Pb(Mg1/3Nb2/3)O3-PbTiO3 powders can reach more than 250 with weak temperature dependence. In addition, the composites under a proper preparation procedure exhibit a high breakdown field strength (>120 MV/m), leading to a maximum energy storage density of more than 15 J/cm3. Experimental results also indicate that the high electron irradiation does not have much effect on the dielectric behavior of Pb(Mg1/3Nb2/3)O3-PbTiO3 powders, possibly due to the relaxor nature of the ceramic.

Original languageEnglish (US)
Pages (from-to)3804-3806
Number of pages3
JournalApplied Physics Letters
Issue number25
StatePublished - Jun 19 2000

All Science Journal Classification (ASJC) codes

  • Physics and Astronomy (miscellaneous)


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