Complex permittivity and microwave heating behavior of rod-shaped SiC and oxide (SiO2, Al2O3) mixtures

Noboru Yoshikawa; Kohsaku Seki; Naoki Inoue; Sergey Komarov; Kei ichirou Kashimura; Takashi Fujii; Hideoki Fukushima

doi:10.1016/j.matchemphys.2019.05.093

Complex permittivity and microwave heating behavior of rod-shaped SiC and oxide (SiO₂, Al₂O₃) mixtures

Noboru Yoshikawa, Kohsaku Seki, Naoki Inoue, Sergey Komarov, Kei ichirou Kashimura, Takashi Fujii, Hideoki Fukushima

ENV - Frontier Science for Advanced Environment

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

6 Citations (Scopus)

Abstract

Permittivity measurement and microwave heating characteristics of rod-shaped SiC (fragmented SiC fiber) mixed with SiO₂ or Al₂O₃ were investigated, comparing with the mixtures of other two kinds of SiC materials. Rod-shaped SiC mixtures had larger permittivity (both real and especially imaginary parts) than the other SiC mixtures, and a broad peak of loss factor (ε_r”) appeared around 1 GHz. Effective permittivity of mixtures was not successfully fitted by Maxwell-Garnett mixing law to the rod-shaped SiC mixtures but well fitted to other kinds of SiC mixtures. The microwave heating ability of rod-shaped SiC mixtures were much superior to that of other SiC mixtures, as expected from the larger loss factors. However, differences were observed between the mixture of rod-shaped SiC with SiO₂ and with γ-Al₂O₃ in heating behavior and in the mixture permittivity. Interactions of the rod SiC are considered different between SiO₂ and γ-Al₂O₃ and influenced the experimental heating data.

Original language	English
Pages (from-to)	281-287
Number of pages	7
Journal	Materials Chemistry and Physics
Volume	234
DOIs	https://doi.org/10.1016/j.matchemphys.2019.05.093
Publication status	Published - 2019 May 15

Keywords

Microwave heating
Mixing rule
Permittivity
Powder mixture
Silicon carbide

ASJC Scopus subject areas

Materials Science(all)
Condensed Matter Physics

Access to Document

10.1016/j.matchemphys.2019.05.093

Cite this

@article{c2c46b5c8d8e42dda7c69326e0b74c0d,

title = "Complex permittivity and microwave heating behavior of rod-shaped SiC and oxide (SiO2, Al2O3) mixtures",

abstract = "Permittivity measurement and microwave heating characteristics of rod-shaped SiC (fragmented SiC fiber) mixed with SiO2 or Al2O3 were investigated, comparing with the mixtures of other two kinds of SiC materials. Rod-shaped SiC mixtures had larger permittivity (both real and especially imaginary parts) than the other SiC mixtures, and a broad peak of loss factor (εr”) appeared around 1 GHz. Effective permittivity of mixtures was not successfully fitted by Maxwell-Garnett mixing law to the rod-shaped SiC mixtures but well fitted to other kinds of SiC mixtures. The microwave heating ability of rod-shaped SiC mixtures were much superior to that of other SiC mixtures, as expected from the larger loss factors. However, differences were observed between the mixture of rod-shaped SiC with SiO2 and with γ-Al2O3 in heating behavior and in the mixture permittivity. Interactions of the rod SiC are considered different between SiO2 and γ-Al2O3 and influenced the experimental heating data.",

keywords = "Microwave heating, Mixing rule, Permittivity, Powder mixture, Silicon carbide",

author = "Noboru Yoshikawa and Kohsaku Seki and Naoki Inoue and Sergey Komarov and Kashimura, {Kei ichirou} and Takashi Fujii and Hideoki Fukushima",

year = "2019",

month = may,

day = "15",

doi = "10.1016/j.matchemphys.2019.05.093",

language = "English",

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journal = "Materials Chemistry and Physics",

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T1 - Complex permittivity and microwave heating behavior of rod-shaped SiC and oxide (SiO2, Al2O3) mixtures

AU - Yoshikawa, Noboru

AU - Seki, Kohsaku

AU - Inoue, Naoki

AU - Komarov, Sergey

AU - Kashimura, Kei ichirou

AU - Fujii, Takashi

AU - Fukushima, Hideoki

PY - 2019/5/15

Y1 - 2019/5/15

N2 - Permittivity measurement and microwave heating characteristics of rod-shaped SiC (fragmented SiC fiber) mixed with SiO2 or Al2O3 were investigated, comparing with the mixtures of other two kinds of SiC materials. Rod-shaped SiC mixtures had larger permittivity (both real and especially imaginary parts) than the other SiC mixtures, and a broad peak of loss factor (εr”) appeared around 1 GHz. Effective permittivity of mixtures was not successfully fitted by Maxwell-Garnett mixing law to the rod-shaped SiC mixtures but well fitted to other kinds of SiC mixtures. The microwave heating ability of rod-shaped SiC mixtures were much superior to that of other SiC mixtures, as expected from the larger loss factors. However, differences were observed between the mixture of rod-shaped SiC with SiO2 and with γ-Al2O3 in heating behavior and in the mixture permittivity. Interactions of the rod SiC are considered different between SiO2 and γ-Al2O3 and influenced the experimental heating data.

AB - Permittivity measurement and microwave heating characteristics of rod-shaped SiC (fragmented SiC fiber) mixed with SiO2 or Al2O3 were investigated, comparing with the mixtures of other two kinds of SiC materials. Rod-shaped SiC mixtures had larger permittivity (both real and especially imaginary parts) than the other SiC mixtures, and a broad peak of loss factor (εr”) appeared around 1 GHz. Effective permittivity of mixtures was not successfully fitted by Maxwell-Garnett mixing law to the rod-shaped SiC mixtures but well fitted to other kinds of SiC mixtures. The microwave heating ability of rod-shaped SiC mixtures were much superior to that of other SiC mixtures, as expected from the larger loss factors. However, differences were observed between the mixture of rod-shaped SiC with SiO2 and with γ-Al2O3 in heating behavior and in the mixture permittivity. Interactions of the rod SiC are considered different between SiO2 and γ-Al2O3 and influenced the experimental heating data.

KW - Microwave heating

KW - Mixing rule

KW - Permittivity

KW - Powder mixture

KW - Silicon carbide

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