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所属单位：材料科学与技术学院
发表刊物：DALTON TRANSACTIONS
关键字：MICROWAVE-ABSORPTION PROPERTIES ELECTROMAGNETIC-WAVE ABSORPTION FACILE SYNTHESIS BROAD-BAND HIGHLY EFFICIENT HOLLOW SPHERES PERFORMANCE LIGHTWEIGHT MICROSPHERES NANOCOMPOSITES
摘要：Combination of carbon and metal materials is a good strategy to develop lightweight microwave absorbents. Taking advantage of the encapsulation property of carbon nanoflakes, a stable microwave absorber could be achieved. In this study, we managed to achieve sandwich-shaped Ni/C nanoflakes via a simple route involving a one-step hydrothermal method towards Ni(OH)(2) nanosheets, followed by a calcination procedure. These sandwiched carbon nanoflakes not only increased the interfacial polarization, but also resulted in the absolute stability of metal nanoparticles. Considering the higher possibility of some support plates to be wrinkled, which would bring about imperfect sandwiched structures, the free-standing sandwiched composites were in a relatively good shape. Furthermore, the intensive conductive loss could be highly responsible for better microwave absorption properties by adjusting the carbonization temperature. The minimum reflection loss (RL) value of Ni/C composites that were obtained with a 25% loading filler ratio could reach -24.3 dB with a matching thickness of only 1.5 mm. Moreover, the effective microwave absorption bandwidth (<-10 dB) could reach to 4.0 GHz with thicknesses of both 1.3 mm and 1.4 mm. Therefore, the sandwich-shaped Ni/C nanoflakes could be exploited as an effective and lightweight microwave absorber.
ISSN号：1477-9226
是否译文：否
发表时间：2018-09-07
合写作者：吕婧,梁小会,刘伟,刘伟,陈家彬,姬广斌
通讯作者：姬广斌,杨志鸿