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- Title
Microemulsion synthesis and magnetic properies of BaAlFeO powders.
- Authors
He, H.; He, Z.; Shen, Q.
- Abstract
Al-substituted M-type hexaferrite is a highly anisotropic ferromagnetic material. In the present study, we report the synthesis and the characterization of BaAlFeO powder from two microemulsion systems of po1yoxyethylene octylphenol ether/1, 2-propylene glycol, or ethanol/cyclohexane/water and cetrimonium bromide/1, 2-propylene glycol/cyclohexane/water. Two microemulsion systems were found to give wide stable regions. The synthesized powders were characterized with x-ray diffraction, scanning electron microscopy, and vibrating sample magnetometer. The experiment results indicated that the surfactant, co-surfactant, and oil/water ratio remarkably affected the particle size, size distribution, anisotropy and magnetic property of the powders. The powder prepared with microemulsion of po1yoxyethylene octylphenol ether/1, 2-propylene glycol/cyclohexane/water exhibited best particle character, that is, uniform thin particle morphology, large shape anisotropy, small particle size, large coercivity of 8.73 kOe, and saturation magnetization of 20.821 emu·g.
- Subjects
FERROMAGNETIC materials; EMULSIONS; POLYETHYLENE glycol; SURFACE active agents; X-ray diffractometers; SCANNING electron microscopy; MAGNETOMETERS
- Publication
JOM: The Journal of The Minerals, Metals & Materials Society (TMS), 2011, Vol 63, Issue 10, p34
- ISSN
1047-4838
- Publication type
Article
- DOI
10.1007/s11837-011-0171-6