The effect of ions doping on the rheological properties of ferrite ferrofluids

Frontiers in Materials

Materials

Wangxu Li¹  Shengnan Yan¹  Zhenggui Li¹  Jie Zhang¹  Xiaobing Liu¹  Fang Chen¹  Zhaoqiang Yan² 

[1] Key Laboratory of Fluid and Power Machinery (Xihua University), Ministry of Education, Chengdu, China;Zigong Zhaoqiang Sealing Products Industrial Co., Ltd., Zigong, China;

关键词: ion doping;    ferrite nanoparticle;    magnetization curve;    viscosity;    ferrofluid;   

DOI  :  10.3389/fmats.2023.1264049

 received in 2023-07-24, accepted in 2023-08-28,  发布年份 2023

来源: Frontiers

【 摘 要 】

A series of ferrite nanoparticles were synthesized via ion doping and then were coated by surfactant and dispersed in perfluorinated polyether oil (PFPE-oil), and the various ferrite ferrofluids were obtained. The scanning electron microscope was used to characterize the morphology of particles and the dispersed state of ferrofluid, energy-dispersive spectroscopy was used to study the chemical composition of particles, fourier transform infrared spectroscopy (FTIR) and thermogravimetric analysis were used to study the coated effect of PFPE-acids on particles, vibrating sample magnetometer was used to research the magnetization curves of ferrite particles, and the rheological property of the ferrite ferrofluids was studied by a rheometer. The results show that Zn2+, Mn2+/Zn2+, and Dy3+ ions were doped in the ferrite nanoparticles with a size less than 50 nm. The four kinds of ferrite nanoparticles have the characteristics of super-paramagnetic materials, and the M-T curves decrease with increasing temperature, while their decline rates are notably different. The ferrite particles are coated with PFPE acids chemically, and the ferrofluids have well dispersion stability. The rheological properties of the ferrite ferrofluids change with the variation of ion doping, magnetic field strength, temperature, etc. The magnetism and viscosity of ferrite ferrofluids are regularly affected by ion doping, and the results will have a great significance on basic research and related applications.

【 授权许可】

Unknown   
Copyright © 2023 Chen, Zhang, Liu, Yan, Li, Yan and Li.