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Dielectric and Mechanical Properties of MoSi 2 /Al 2 O 3 Composites Prepared by Hot Pressing
Author(s) -
Huang Zhibin,
Zhou Wancheng,
Tang Xiufeng,
Li Peng,
Zhu Jiankun
Publication year - 2010
Publication title -
journal of the american ceramic society
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.9
H-Index - 196
eISSN - 1551-2916
pISSN - 0002-7820
DOI - 10.1111/j.1551-2916.2010.04099.x
Subject(s) - materials science , composite material , dielectric , ceramic , hot pressing , sintering , composite number , permittivity , pressing , phase (matter) , dielectric loss , chemistry , optoelectronics , organic chemistry
High‐density MoSi 2 /Al 2 O 3 ceramic composites were prepared by hot‐press sintering using MoSi 2 powders and α‐Al 2 O 3 powders as starting materials. The mechanical and dielectric properties of these composites were studied. The results showed that both the real part and the imaginary part of the complex permittivity increased with the increasing MoSi 2 content over the frequency range of 8.2–12.4 GHz, which means that the dielectric performance of the composites can be adjusted mainly by controlling the MoSi 2 content. On the other hand, high strength and high hardness were also obtained in these composites with MoSi 2 as the reinforcing phase. These results indicated that the MoSi 2 /Al 2 O 3 composite was a promising material with both the electromagnetic wave absorbing and the load‐bearing abilities.