Anisotropic binary TiB2–SiC composite powders: Synthesis and microwave absorption properties

Anisotropic binary TiB2–SiC composite powders: Synthesis and microwave absorption properties
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各向异性二元TiB2-SiC复合粉末的合成及微波吸收性能

DOI:
10.1016/j.ceramint.2021.12.068
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发表时间:
2021-12
影响因子:
5.2
通讯作者:
Zhen Qiang
Zhen Qiang
中科院分区:
材料科学1区
文献类型:
--
作者:
Shen Sunyi;Song Shaolei;Wang Jinming;Li Rong;Li Xingchao;Zhen Qiang

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在微波吸收剂的合成过程中控制其微观结构和采用多种复合方法可以提高微波吸收剂的吸收性能。本文采用溶胶-凝胶碳热还原法成功地合成了具有六方片状(TiB_2)和颗粒状(SiC)互锁结构的TiB_2-SiC(TsBC)二元粉末。研究了原料配比和合成温度对合成粉体的影响,并对合成粉体的微波吸收性能进行了评价。结果表明,TsBC吸收体具有优异的微波吸收性能,在17.4 GHz下,对应于4 mm厚度的最小反射损耗(RL)达到-21.8 dB。这种优异的性能归因于TiB 2-SiC界面间的界面极化和片-颗粒互锁结构间的多次反射。
Microstructure control and multiple compounding methods in the synthesis stage can enhance microwave absorption performance of microwave absorbents. In this work, we successfully synthesized binary TiB2–SiC (TsBC) powders with hexagonal sheet (TiB2) and particle (SiC) interlocking structures by sol-gel carbothermal reduction method. We investigated the effect of raw material ratio and synthesis temperature on the synthesized powders and evaluated the microwave absorption properties of the synthesized TsBC powders. It was found that the TsBC absorber exhibited excellent microwave adsorption properties with the minimum Reflection Loss (RL) reached −21.8 dB at 17.4 GHz corresponding to the thickness of 4 mm. This excellent performance was attributed to the interfacial polarization between TiB2–SiC interfaces and the multiple reflections between the sheet-particle interlocking structures.
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