TY - JOUR
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 Victorovich
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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U2 - 10.1016/j.matchemphys.2019.05.093
DO - 10.1016/j.matchemphys.2019.05.093
M3 - Article
AN - SCOPUS:85067562679
VL - 234
SP - 281
EP - 287
JO - Materials Chemistry and Physics
JF - Materials Chemistry and Physics
SN - 0254-0584
ER -