Journal
JOURNAL OF ALLOYS AND COMPOUNDS
Volume 562, Issue -, Pages 211-218Publisher
ELSEVIER SCIENCE SA
DOI: 10.1016/j.jallcom.2013.02.049
Keywords
Strontium hexaferrite; Hydrothermal synthesis; Magnetic fluid; Hyperthermia
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Funding
- National Natural Science Foundation of China (NSFC) [21246002, 20876100]
- National Basic Research Program of China (973 Program) [2009CB219904]
- Key Lab. of Organic Synthesis of Jiangsu Prov., National Post-doctoral Science Foundation [20090451176]
- Key Lab. of Environmental Materials and Environmental Engineering of Jiangsu Prov., Yangzhou University [K11025]
- Technology Innovation Foundation of MOST [11C26223204581]
- Natural Science Foundation of Jiangsu Prov. [BK2011328]
- Minjiang Scholarship of Fujian Prov.
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Strontium hexaferrite (SrFe12O19) nanoparticles were prepared using ethylene glycol (EG) assisted hydrothermal synthesis. The experimental results revealed that the reaction temperature and the amount of EG had an effect on the size, morphology and magnetic properties of SrFe12O19 nanoparticles. SrFe12O19 nanoparticles with a size of about 25 nm were obtained at 140 degrees C for 24 h at the EG/W volumetric ratios of 1/1. The saturation magnetization of the particles was approximately 10.6 emu/g. Furthermore, SrFe12O19 nanoparticles modified by oleic acid could be dispersed in high boiling point mineral oil to form highly-concentrated magnetic fluid. The magnetic and rheological properties of magnetic fluid were investigated using a Gouy magnetic balance and a rotational rheometer, respectively. The magnetic fluid showed excellent stability in gravity field and external magnetic field, and exhibited shear-thinning behavior. Moreover, the magnetic fluid had obvious heating effect in an alternating magnetic field and had potential on hyperthermia therapy of tumor. (C) 2013 Elsevier B. V. All rights reserved.
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