Measuring the Permittivity of Barium Titanate Nanoparticles in an Epoxy Composite
POSTER
Abstract
Barium titanate (BTO) is used as a dielectric material due to its high dielectric constant, which ranges from 1500 to 2000 in bulk [1]. Literature remains unclear on how BTO nanoparticle size impacts the dielectric constant, particularly for non-sintered, discrete nanoparticles. Studies have reported nanoparticle dielectric constants ranging from 135 [2] to 5000 [3].
We developed a procedure for fabricating BTO-epoxy nanocomposite materials, using ball-milling steps alongside surfactants to reduce nanoparticle agglomeration. We compare observed composite dielectric constants to finite-element models at various levels of agglomeration to determine the nanoparticle dielectric constant for nanoparticles with diameters between 50 and 500 nm.
[1] Arlt et al. Journal of Applied Physics 58 (1985): 1619.
[2] Siddabattuni et al. Journal of the American Ceramic Society 96.5 (2013): 1490.
[3] Wada et al. Japanese Journal of Applied Physics 42 Part 1, No. 9B (2003): 6188.
We developed a procedure for fabricating BTO-epoxy nanocomposite materials, using ball-milling steps alongside surfactants to reduce nanoparticle agglomeration. We compare observed composite dielectric constants to finite-element models at various levels of agglomeration to determine the nanoparticle dielectric constant for nanoparticles with diameters between 50 and 500 nm.
[1] Arlt et al. Journal of Applied Physics 58 (1985): 1619.
[2] Siddabattuni et al. Journal of the American Ceramic Society 96.5 (2013): 1490.
[3] Wada et al. Japanese Journal of Applied Physics 42 Part 1, No. 9B (2003): 6188.
*Sandia National Laboratories is a multimission laboratory managed and operated by National Technology and Engineering Solutions of Sandia LLC, a wholly owned subsidiary of Honeywell International Inc. for the U.S. Department of Energy’s National Nuclear Security Administration under contract DE-NA0003525
Presenters
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Richard Liu
- Harvey Mudd College