High dielectric constant polymer ceramic composites

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

    Research output: Contribution to journalArticlepeer-review

    Abstract

    A new polymer-ceramic composite, using the newly developed relaxor ferroelectric polymer that has a high room temperature dielectric constant as the matrix, is reported. Different kinds of ceramic powders were studied and homogeneous composite thin films (20μm) were fabricated. It was observed that the increase of the dielectric constant of the composites with the ceramic content could be described quite well by the expression developed by Yamada et al., when the ceramic content is below 60% by volume. The experimental data shows that the relative dielectric constant of composites using PMN-PT powders can reach more than 250 with weak temperature dependence (i.e., the dielectric constant changes little in a broad temperature range). In addition to high permittivity, the composite prepared in clean environment also has high breakdown field strength (120MV/m), which yields an energy storage density more than 14J/cm3. The dielectric behavior of the composite at various frequencies was also studied and the results show that the material is promising for high frequency applications.

    Original languageEnglish (US)
    Pages (from-to)281-286
    Number of pages6
    JournalMaterials Research Society Symposium - Proceedings
    Volume600
    StatePublished - Jan 1 2000

    All Science Journal Classification (ASJC) codes

    • Materials Science(all)
    • Condensed Matter Physics
    • Mechanics of Materials
    • Mechanical Engineering

    Fingerprint Dive into the research topics of 'High dielectric constant polymer ceramic composites'. Together they form a unique fingerprint.

    Cite this