High-dielectric-constant ceramic-powder polymer composites
2000; American Institute of Physics; Volume: 76; Issue: 25 Linguagem: Inglês
10.1063/1.126787
ISSN1520-8842
AutoresYang Bai, Z.‐Y. Cheng, Vineet Bharti, Hongyao Xu, Q. M. Zhang,
Tópico(s)Microwave Dielectric Ceramics Synthesis
ResumoA 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.
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