Preparation and characterization of complex ferrite nanoparticles by a polymer-pyrolysis route |
| |
Authors: | Xian-Ming Liu Shao-Yun Fu Hong-Mei Xiao Lu-Ping Zhu |
| |
Institution: | (1) Technical Institute of Physics and Chemistry, Chinese Academy of Sciences, Beijing, 100080, P.R. China;(2) Graduate School, Chinese Academy of Sciences, Beijing, 100039, P.R. China;(3) Department of Chemistry, Luoyang Normal College, Luoyang, 471022, P.R. China |
| |
Abstract: | The polymer-pyrolysis route used in this work was to synthesize the copolymeric precursor of the mixed metallic ions and then
to pyrolyze the precursor into complex spinel ferrite nanoparticles. Thermogravimetric analysis (TGA) showed that the complex
ferrite nanoparticles could be obtained by calcination of their precursors at 500°C. The structures, elemental analyses and
particle morphology of the as-calcined products were characterized by powder X-ray diffraction (XRD), ICP-AES, transmission
electron microscope (TEM) and electron diffraction (ED) pattern. The results revealed that the as-calcined powders were complex
spinel ferrites and the size of those nanoparticles ranged from 10 to 20 nm. Magnetic measurements were carried out at room
temperature using a vibrating sample magnetometer (VSM). The saturation magnetization of the Mn–Zn ferrites was related to
the molar ratio of Mn to Zn and increased with the increase of Mn. The complex Co–Mn–Zn ferrite nanoparticles showed a high
magnetization of 58 emu/g at the applied field of 10 kOe and a low coercivity of 30 Oe, which indicated that this materials
exhibited characteristics of soft ferromagnetism. |
| |
Keywords: | spinel ferrite pyrolysis polymerization magnetization ferromagnetism nanoengineering |
本文献已被 SpringerLink 等数据库收录! |
|