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

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

doi:10.1143/JJAP.51.09LC07

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

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

School of Law

Research output: Contribution to journal › Article › peer-review

9 Citations (Scopus)

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 language	English
Article number	09LC07
Journal	Japanese Journal of Applied Physics
Volume	51
Issue number	9 PART 2
DOIs	https://doi.org/10.1143/JJAP.51.09LC07
Publication status	Published - 2012 Sep

ASJC Scopus subject areas

Engineering(all)
Physics and Astronomy(all)

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title = "Percolative BaTiO 3/carbon-nanotube composite films employing aerosol deposition",

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.",

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