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| Study on high temperature oxidation resistance and microwave absorption properties of Ti3SiC2 powders |
| GUO Yang1.，TAN Kehua1.，GUO Xiaoying1.，WANG Bing1.，LI Huirong1.，BI Lei2. |
| （1. School of Electrical Information Engineering, University of Panzhihua, Panzhihua 617000，China； 2.School
of Electronic Science and Engineering, University of Electronic Science and Technology of China, Chengdu
610054, China） |
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Abstract Ti
3SiC2（TSC）is of great interest in the area of high-temperature microwave absorption because of its
good electrical conductivity and high thermostability. In this paper, TSC powders were prepared by high-tempera‐
ture solid-state reaction at 1 400 oC for 3 h. The experimental raw materials were Ti powder, Si powder and graph‐
ite powder. Its composition and phase were analyzed by XRD and XPS. Further, its high temperature oxidation
resistance and microwave absorption properties were characterized by thermogravimetric analyzer and vector net‐
work analyzer. The results show that the impurity phases in TSC powders mainly include SiC, SiO2, TiO2 and TiC.
TSC powders can maintain good high-temperature oxidation resistance below 400 oC. When the thickness of the
mixture of TSC and paraffin is 2.0 mm, the effective absorption bandwidth（EAB）of the composite containing
60%（mass fraction）TSC is 0.9 GHz（17.10-18.0 GHz）. When the TSC content is increased to 70%, the EAB is
expanded to 3.86 GHz（12.95-16.81 GHz）. When the TSC content is further increased to 80%, its EAB decreases
to 1.44 GHz（9.37-10.77 GHz）.
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Received: 28 July 2022
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Corresponding Authors:
李会容（1971—），女，硕士，教授，主要研究方向为新型功能吸波材料。
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2023, Vol. 33 
