Yi Hou , Baijun Chen , Hui Zhang , Pengyu Wang , Zixin Wang , Zhiqiang Liu , Tiansheng Wang , Lixi Wang
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引用次数: 0
Abstract
High-temperature resistant performance for thermal end components has always been a key development direction in advanced microwave absorption materials. SiC fibrous materials could be served as the ideal candidate to meet the challenge of both lightweight and high temperature resistance. However, the relatively weak microwave attenuation capacity of pure SiC fibers greatly limit the further application. Herein, highly crystallized SiC nanoparticles (SiCnp) were decorated into the SiC fiber (SiCf) matrix via co-electrospinning and high temperature pyrolysis. The resultant SiCnp@SiCf composite fiber material possesses abundant heterogeneous interfaces to fascinate the dielectric loss, as well as the enhancement of conductivity loss. The optimized SiCnp@SiCf sample pyrolyzed at 1300 °C exhibits a minimal reflection loss (RLmin) of −57.04 dB at 6.84 GHz, and the effective absorption bandwidth (EAB) reaches as wide as 7.5 GHz at 2.7 mm. With the filler content of only 10 wt%, the prepared SiCnp@SiCf hybrid material could be applied as highly efficient and broadband ceramic microwave absorber.
期刊介绍:
Ceramics International covers the science of advanced ceramic materials. The journal encourages contributions that demonstrate how an understanding of the basic chemical and physical phenomena may direct materials design and stimulate ideas for new or improved processing techniques, in order to obtain materials with desired structural features and properties.
Ceramics International covers oxide and non-oxide ceramics, functional glasses, glass ceramics, amorphous inorganic non-metallic materials (and their combinations with metal and organic materials), in the form of particulates, dense or porous bodies, thin/thick films and laminated, graded and composite structures. Process related topics such as ceramic-ceramic joints or joining ceramics with dissimilar materials, as well as surface finishing and conditioning are also covered. Besides traditional processing techniques, manufacturing routes of interest include innovative procedures benefiting from externally applied stresses, electromagnetic fields and energetic beams, as well as top-down and self-assembly nanotechnology approaches. In addition, the journal welcomes submissions on bio-inspired and bio-enabled materials designs, experimentally validated multi scale modelling and simulation for materials design, and the use of the most advanced chemical and physical characterization techniques of structure, properties and behaviour.
Technologically relevant low-dimensional systems are a particular focus of Ceramics International. These include 0, 1 and 2-D nanomaterials (also covering CNTs, graphene and related materials, and diamond-like carbons), their nanocomposites, as well as nano-hybrids and hierarchical multifunctional nanostructures that might integrate molecular, biological and electronic components.