Preparation and microwave absorption properties of Ni(Co/Zn/Cu)Fe2O4/SiC@SiO2 composites

• Published in: Rare metals Vol. 38; no. 1; pp. 59 - 63
• Main Authors: Wang, Peng, Liu, Ping-An, Ye, Sheng
• Format: Journal Article
• Language: English
• Published: Beijing Nonferrous Metals Society of China 01.01.2019; Springer Nature B.V
• Subjects: Biomaterials; Chemistry and Materials Science; Cobalt; Composite materials; Copper; Core-shell structure; Energy; Frequency ranges; Materials Engineering; Materials Science; Metallic Materials; Microwave absorbers; Microwave absorption; Morphology; Nanoscale Science and Technology; Nickel ferrites; Photoelectrons; Physical Chemistry; Properties (attributes); Scanning electron microscopy; Silicon dioxide; Sol-gel processes; Solid phases; X ray photoelectron spectroscopy; X-ray diffraction; Zinc; Sol–gel method; Core–shell structure; Ni(Co/Zn/Cu)Fe; SiC@SiO; Microwave absorption property; O
• ISSN: 1001-0521; 1867-7185
• DOI: 10.1007/s12598-016-0752-1

Ni(Co/Zn/Cu)Fe 2 O 4 /SiC@SiO 2 , a microwave absorber, was prepared by the sol–gel method. The phase structure and the morphology of the microwave absorbers were characterized by X-Ray Diffraction (XRD) and scanning electron microscopy (SEM), respectively. Laser sizer (LS) and X-ray photoelectron spectroscopy (XPS) analysis show the core–shell structure of SiC@SiO 2 . Coaxial method was used to measure the microwave absorption properties of the prepared composites in the frequency range of 2–18 GHz. When 70 wt% SiC is wrapped by 30 wt% SiO 2 , and 50 wt% NiFe 2 O 4 is added into 50 wt% SiC@SiO 2 , the as-prepared powders are found to have advanced microwave absorption properties with a minimum reflection loss (RL) of −32.26 dB at about 6.08 GHz, and the available bandwidth is approximately 2.1 GHz when the RL is below −10 dB.