Percolative BaTiO 3/carbon-nanotube composite films employing aerosol deposition

Yoon Hyun Kim, Minoru Osada, Hong Ki Kim, Song Min Nam

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    Abstract

    Percolative BaTiO 3/multiwalled carbon nanotube (MWNT) composite thick films were developed using an aerosol deposition (AD) process at room temperature. Well-dispersed mixed powders with various volume ratios were utilized as the starting powders for AD, and dense BaTiO 3/ MWNT composite thick films were successfully fabricated with the starting mixed powders with 0.01 vol% MWNTs. The existence of MWNTs in the composite films was confirmed using Raman spectroscopy. The composite films show a high relative dielectric constant (657 at 1 kHz), which is approximately 7 times larger than that (91 at 1 kHz) of the BaTiO 3 films. In addition, the strong frequency dispersion of the dielectric constant in the low-frequency range was confirmed for the composite films. The dielectric properties of the composite films were investigated using the dielectric mechanism used in percolative composites.

    Original languageEnglish
    Article number09LC07
    JournalJapanese Journal of Applied Physics
    Volume51
    Issue number9 PART 2
    DOIs
    Publication statusPublished - 2012 Sep

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    ASJC Scopus subject areas

    • Engineering(all)
    • Physics and Astronomy(all)

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