用于电磁波吸收的超长SiC纳米线

IF 5.5 2区 材料科学 Q2 MATERIALS SCIENCE, MULTIDISCIPLINARY
Shuang Yin*, Jiajun Liu, Chengyun Sun, Yao Zhang, Chen Ling, Liangliang Gan, Liqiang Liu and Ruzhong Zuo*, 
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引用次数: 0

摘要

以椰子活性炭为碳源,硅粉为硅源,石墨片为生长基质,采用碳热还原法成功合成了具有较强吸波能力的超长圆柱形和链状SiCnw。烧结温度和保温时间对SiCnw的组成、微观结构、形貌、介电性能和吸收特性有显著影响。烧结温度的升高促进了sicw从圆柱形向链状的转变。将保温时间从2 h延长至6 h,在纵向和横向上都促进了SiCnw的生长。在1200°C下加热2 h,圆柱形SiCnw表现出优异的吸收性能,在4.5 mm和5.32 GHz波段的RL为- 65.40 dB, EAB为1.66 GHz,范围为4.64-6.30 GHz。当在1200℃下烧结6小时时,圆柱形SiCnw在2.00 mm和14.86 GHz处的RL为- 57.70 dB,在12.50和18.00 GHz之间的EAB为5.50 GHz。在1400℃下加热6 h,在3.50 mm和5.96 GHz频段的RL为- 47.00 dB,在5.30-6.86 GHz频段的EAB为1.56 GHz。这些见解强调了SiCnw在电磁波吸收应用中的巨大可能性。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Ultralong SiC Nanowires for Electromagnetic Wave Absorption

Ultralong SiC Nanowires for Electromagnetic Wave Absorption

Ultralong cylindrical and chain-beaded SiCnw with strong wave-absorbing capabilities were successfully synthesized by carbothermal reduction, employing coconut active charcoal as a carbon source, silicon powders as a silicon source, and graphite flake as a growth matrix. The sintering temperature and holding duration considerably influenced the composition, microstructure, morphology, dielectric properties, and absorption traits of SiCnw. Elevated sintering temperature facilitated the transformation from cylindrical to chain-beaded SiCnw. Extending the holding duration from 2 h to 6 h promoted SiCnw growth in both longitudinal and transverse directions. At 1200 °C for 2 h, the cylindrical SiCnw exhibited superior absorption properties, featuring an RL of −65.40 dB at 4.5 mm and 5.32 GHz, along with an EAB of 1.66 GHz spanning 4.64–6.30 GHz. When sintered at 1200 °C for 6 h, the cylindrical SiCnw demonstrated an RL of −57.70 dB at 2.00 mm and 14.86 GHz, along with an EAB of 5.50 GHz between 12.50 and 18.00 GHz. At 1400 °C for 6 h, the chain-beaded SiCnw exhibited an RL of −47.00 dB at 3.50 mm and 5.96 GHz and an EAB of 1.56 GHz across 5.30–6.86 GHz. These insights accentuate the considerable possibilities of SiCnw in electromagnetic wave absorption applications.

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来源期刊
CiteScore
8.30
自引率
3.40%
发文量
1601
期刊介绍: ACS Applied Nano Materials is an interdisciplinary journal publishing original research covering all aspects of engineering, chemistry, physics and biology relevant to applications of nanomaterials. The journal is devoted to reports of new and original experimental and theoretical research of an applied nature that integrate knowledge in the areas of materials, engineering, physics, bioscience, and chemistry into important applications of nanomaterials.
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