材料科学
微波食品加热
反射损耗
复合材料
价(化学)
金属
吸收(声学)
复合数
冶金
物理
量子力学
作者
Junxiong Xiao,Beibei Zhan,Xiaosi Qi,Jingzhong Ding,Yunpeng Qu,X. G. Gong,Jingliang Yang,Lei Wang,Zhong Wang,Renchao Che
出处
期刊:Small
[Wiley]
日期:2024-04-02
标识
DOI:10.1002/smll.202311312
摘要
The exploitation of multicomponent composites (MCCs) has become the main pathway for obtaining advanced microwave absorption materials (MAMs). Herein, a metal valence state modulation strategy is proposed to tune the electromagnetic (EM) parameters and improve microwave absorption performances. Core@shell hollow carbon microspheres@MoSe2 and hollow carbon microspheres@MoSe2/MoOx MCCs with various mixed-valence states content are well-designed and produced by a simple hydrothermal reaction or/and heat treatment process. The results reveal that the thermal treatment of hollow carbon microspheres@MoSe2 in Ar and Ar/H2 leads to the in situ formation of MoOx and multivalence state, respectively, and the enhanced content of Mo4+ in the designed MCCs greatly boosts their impedance matching characteristics, polarization, and conduction loss capacities, which lead to their evidently improved EM wave absorption properties. Amongst, the as-prepared hollow carbon microspheres@MoSe2/MoOx MCCs achieve an effective absorption bandwidth of 5.80 GHz under a matching thickness of 1.97 mm and minimum reflection loss of -21.49 dB. Therefore, this work offers a simple and universal method to fabricate core@shell hollow carbon microspheres@MoSe2/MoOx MCCs, and a novel and feasible metal valence state modulation strategy is proposed to develop high-efficiency MAMs.
科研通智能强力驱动
Strongly Powered by AbleSci AI