SCI和EI收录∣中国化工学会会刊

中国化学工程学报 ›› 2021, Vol. 37 ›› Issue (9): 208-216.DOI: 10.1016/j.cjche.2021.03.047

• Material and Product Engineering • 上一篇    下一篇

Design of core-shell nickel oxide/silicon carbide whiskers towards excellent microwave absorption property

Jingpeng Chen1,2, Ge Song1,2, Zhuo Liu!, Lijing Xie1, Shoushun Zhang1, Chengmeng Chen1,3   

  1. 1. CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • 收稿日期:2020-12-01 修回日期:2021-03-13 出版日期:2021-09-28 发布日期:2021-11-02
  • 通讯作者: Shoushun Zhang, Chengmeng Chen
  • 基金资助:
    This research was supported by the National Science Foundation for Excellent Young Scholars of China (21922815), National Natural Science Foundation of China (21975275), Scientific Research Foundation for Young Scientists of Shanxi Province (201801D221156), and Research Project Supported by Department of Resource and Social Security of Shanxi Province. Research was provided technical support by "Ceshigo Research Service Agency" for vector network analyzer, www.ceshigo.com.

Design of core-shell nickel oxide/silicon carbide whiskers towards excellent microwave absorption property

Jingpeng Chen1,2, Ge Song1,2, Zhuo Liu!, Lijing Xie1, Shoushun Zhang1, Chengmeng Chen1,3   

  1. 1. CAS Key Laboratory of Carbon Materials, Institute of Coal Chemistry, Chinese Academy of Sciences, Taiyuan 030001, China;
    2. University of Chinese Academy of Sciences, Beijing 100049, China;
    3. Center of Materials Science and Optoelectronics Engineering, University of Chinese Academy of Sciences, Beijing 100049, China
  • Received:2020-12-01 Revised:2021-03-13 Online:2021-09-28 Published:2021-11-02
  • Contact: Shoushun Zhang, Chengmeng Chen
  • Supported by:
    This research was supported by the National Science Foundation for Excellent Young Scholars of China (21922815), National Natural Science Foundation of China (21975275), Scientific Research Foundation for Young Scientists of Shanxi Province (201801D221156), and Research Project Supported by Department of Resource and Social Security of Shanxi Province. Research was provided technical support by "Ceshigo Research Service Agency" for vector network analyzer, www.ceshigo.com.

摘要: Toward the increasingly serious problem of electromagnetic wave pollution, the development of absorbing material with the properties of the light, thin, wide, strong, and multiple applications scenarios is still a huge challenge. Herein, the core-shell nickel oxide/silicon carbide whiskers (NiO/SiCw) with variational NiO morphologies (tulle-, flower, and rod-like) were designed and fabricated via a facile pre-hydrothermal method and post-annealing process. For the NiO shell morphology, it can effectively be controlled by the proportion of Ni(NO3)2·6H2O, NH4Cl, and CO(NH2)2. The structure of NiO/SiCw samples was investigated by XRD, SEM, XPS, TEM, and N2 absorption-desorption. Compared to other morphologies of NiO, the flower-like NiO/SiCw possess a porous structure and large surface area that can benefit from the multiple reflections and attenuation of the microwave. As an absorber, the composite with the flower-like NiO/SiCw filler loading of 50% manifests a superior microwave attenuation capability due to its special porous structure, good impedance matching, and large dielectric loss induced from heterojunction interfacial polarization. The minimum reflection loss of flower-like NiO/SiCw is up to -56.8 dB with a thickness of 1.9 mm, and the maximum effective absorption bandwidth (EAB) reaches 5.17 GHz. The as-prepared flower-like NiO/SiCw with strong absorption, thin thickness, and width EAB can meet the potential requirements for microwave absorption materials under oxidation environments.

关键词: Flower-like NiO/SiCw, Dielectric loss, Interfacial polarization, Microwave absorption

Abstract: Toward the increasingly serious problem of electromagnetic wave pollution, the development of absorbing material with the properties of the light, thin, wide, strong, and multiple applications scenarios is still a huge challenge. Herein, the core-shell nickel oxide/silicon carbide whiskers (NiO/SiCw) with variational NiO morphologies (tulle-, flower, and rod-like) were designed and fabricated via a facile pre-hydrothermal method and post-annealing process. For the NiO shell morphology, it can effectively be controlled by the proportion of Ni(NO3)2·6H2O, NH4Cl, and CO(NH2)2. The structure of NiO/SiCw samples was investigated by XRD, SEM, XPS, TEM, and N2 absorption-desorption. Compared to other morphologies of NiO, the flower-like NiO/SiCw possess a porous structure and large surface area that can benefit from the multiple reflections and attenuation of the microwave. As an absorber, the composite with the flower-like NiO/SiCw filler loading of 50% manifests a superior microwave attenuation capability due to its special porous structure, good impedance matching, and large dielectric loss induced from heterojunction interfacial polarization. The minimum reflection loss of flower-like NiO/SiCw is up to -56.8 dB with a thickness of 1.9 mm, and the maximum effective absorption bandwidth (EAB) reaches 5.17 GHz. The as-prepared flower-like NiO/SiCw with strong absorption, thin thickness, and width EAB can meet the potential requirements for microwave absorption materials under oxidation environments.

Key words: Flower-like NiO/SiCw, Dielectric loss, Interfacial polarization, Microwave absorption