Dielectric and microwave absorption properties of Ti3SiC2 powders

被引：91

作者：

Liu, Yi ^{[1
]}

Luo, Fa ^{[1
]}

Zhou, Wancheng ^{[1
]}

Zhu, Dongmei ^{[1
]}

机构：

[1] Northwestern Polytech Univ, State Key Lab Solidificat Proc, Xian 710072, Peoples R China

来源：

JOURNAL OF ALLOYS AND COMPOUNDS | 2013年 / 576卷

基金：

中国国家自然科学基金;

关键词：

Ti3SiC2; Vacuum pressureless sintering; Complex permittivity; Microwave absorption; TEMPERATURE SYNTHESIS; ABSORBING PROPERTIES; FABRICATION; AL; COMPOSITE; PURITY;

D O I：

10.1016/j.jallcom.2013.04.137

中图分类号：

O64 [物理化学（理论化学）、化学物理学];

学科分类号：

070304 ; 081704 ;

摘要：

Ti3SiC2 powders are synthesized via vacuum pressureless sintering method. The dielectric properties of the powders synthesized at different temperature are investigated in the frequency range from 8.2 to 12.4 GHz (X-band), which suggests the remnant TiC has obvious influence on complex permittivity and the pure Ti3SiC2 powders have the highest dielectric loss. The dielectric and microwave absorption properties of Ti3SiC2 powders are studied. Both the real part (epsilon') and imaginary part (epsilon '') increase with Ti3SiC2 concentration but decrease with increasing frequency, which presents the obvious frequency dispersion effect. Furthermore, the effect of thickness on the microwave absorption property of Ti3SiC2/paraffin mixture is analyzed. The mixture with 70 wt% Ti3SiC2 in 2.0 mm thickness presents the optimum microwave absorption property. The effective absorbing bandwidth (below -10 dB) is almost in the whole frequency range and the lowest reflection loss is -33.83 dB. The results show Ti3SiC2 powders are good microwave absorbents in the X-band frequency range. (C) 2013 Elsevier B.V. All rights reserved.

引用

页码：43 / 47

页数：5

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