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GODA Kazuya


Reflection and Transmission Characteristics of Granular Composite Materials Containing Flake-Shaped Metal Particle

Bulletin of Sanyo-Onoda City University Issue 7 Page 59-65
published_at 2024-03-31
SU10007000008.pdf
[fulltext] 8.03 MB
Title
扁平状金属粒子を含む複合材料の反射・透過特性
Reflection and Transmission Characteristics of Granular Composite Materials Containing Flake-Shaped Metal Particle
Abstract
The reflection and transmission characteristics of granular composite materials containing Cu or Ag-coated Cu
flake-shaped particles were investigated by measurement in free space and by calculation based on transmission line theory. The negative permittivity spectra, which characterized the permittivity properties of metals, were observed in the Cu and Ag-coated Cu flake composites with particle contents above the percolation threshold Φc. For the Cu and Ag-coated Cu flake composites below Φc. the measured absolute values of the reflection coefficient |Γ| and the transmission coefficient ITI increased and decreased with increasing frequency, respectively. The Ag-coated Cu flake composite aboveりcexhibited metallic reflection and transmission characteristics with |Γ| > 0.9 and ITI < 0.1; these characteristics of the Ag-coated Cu flake composite agreed with the calculated results based on transmission line theory. Meanwhile, the measured values of |Γ| and ITI for the Cu flake composites above Φc tended to deviate from the theoretical values due to changes in electrical conductivity.
Creators KASAGI Teruhiro
Creators GODA Kazuya
Creators YAMAMOTO Shinichiro
Source Identifiers [PISSN] 2434-2866
Creator Keywords
Metal granular composite Flake-shaped particles Reflection coefficient Transmission coefficient Transmission line theory 金属粒子複合材料 扁平状粒子 反射係数 透過係数 伝送線路理論
Languages jpn
Resource Type departmental bulletin paper
Publishers Sanyo-Onoda City University
Date Issued 2024-03-31
File Version Version of Record
Access Rights open access