M. Okada
Waseda University
5 Papers
89 Citations
M. Okada is an academic researcher from Waseda University. The author has contributed to research in topics: Dielectric & Terahertz radiation. The author has an hindex of 4, co-authored 5 publications.
Chat about Author
Papers
Dielectric properties of epoxy/clay nanocomposites - effects of curing agent and clay dispersion method
Naoki Tagami,M. Okada,Naoshi Hirai,Yoshimichi Ohki,Toshikatsu Tanaka,Takahiro Imai,Miyuki Harada,Mitsukazu Ochi +7 more
TL;DR: In this article, the differences in the curing agent and filler dispersion method on the dielectric properties were examined for epoxy/clay nanocomposites, and the results of UV photon absorption and PL measurement showed that the bandgap or the energy at which the photon absorption increases drastically is smaller in the amine-cured samples than in the acid anhydride-Cured samples.
66
Photoluminescence in polyamide/mica and polyethylene/ MgO nanocomposites induced by ultraviolet photons
TL;DR: In this paper, optical absorption and photoluminescence induced by vacuum ultraviolet photons for polyamide-6/mica and low-density polyethylene/MgO nanocomposites were investigated.
10
Effects of curing and filler dispersion methods on dielectric properties of epoxy nanocomposites
Naoki Tagami,M. Okada,Naoshi Hirai,Toshikatsu Tanaka,Yoshimichi Ohki,Takahiro Imai,Miyuki Harada,Mitsukazu Ochi +7 more
- 01 Dec 2007
TL;DR: In this article, the differences in the curing agent and filler dispersion method on dielectric properties were examined for epoxy/clay nanocomposites, and it was shown that the presence of nanofillers has a strong effect.
8
Terahertz Spectroscopy as a New Analyzing Tool for Dielectric Properties of Various Insulating Materials
Yoshimichi Ohki,M. Okada,Norikazu Fuse,K. Iwai,Maya Mizuno,Kaori Fukunaga +5 more
- 01 Dec 2008
TL;DR: In this article, the terahertz (THz) spectra of polyamide-6 composites with nm-sized clay fillers obtained by the authors are reviewed, and it has become clear that the dielectric loss factor shows two peaks at around 1.9 THz and 2.7 to 3.1 THz.
7
Terahertz dielectric relaxation spectroscopy in polyamide nanocomposite
K. Iwai,M. Okada,Norikazu Fuse,Yoshimichi Ohki,Kaori Fukunaga,Maya Mizuno +5 more
- 31 Oct 2008
TL;DR: Terahertz time-domain spectroscopy was measured as an effective procedure to analyze the mechanism that induces superior properties in polymer nanocomposites as mentioned in this paper, where the peak frequency of dielectric absorption appearing at frequencies 2.7 - 3.1 THz shifts to a lower frequency by the presence of nanofillers.
1