Synthesis of Cobalt and Its Metallic Magnetic Nanoparticles

Micro/nanosized ferrite and hexaferrite by the polyol processes: The special case of structure and properties of SrFe12O19

“…The polyol process show the great advantages for synthesis in comparison with other processes [3][4][5]. Typically, magnetic micro/nano materials are Fe, FeO In our research, we suggest that the polyol process can realize ferrite and hexaferrite material systems [6][7][8][9][10]. This has led to the A m B n X p extended magnetic materials with the size ranges from micro to nanoscale, which is the center of research interest because of their great potential in most of fields of science and technology, such as catalysis, energy conversion and storage, medicine and biology, sensors and practical applications.…”

“…In fabrication process, magnetic ferrite and hexaferrite oxide structures are formed in micro/nanosized materials using strong reducing agent (NaBH 4 ) with heat treatment after chemical synthesis [6,7]. Here, typical chemicals used included sodium borohydride NaBH 4 as synthesis-controlling agent in the chemical synthetic reaction (Aladdin, China); iron(III) chloride hexahydrate (FeCl According to our previous works [6,7], the samples of magnetic Sr-Fe-O oxide powder products after washing and cleaning PVP were obtained and dried into micro/nanosized magnetic oxide powders with deep dark-red color dried in the temperature range of 200-240 C for several hours (Dry oven, SL, Shel Lab, Germany). The powder samples were isothermally heated at about 950 C for 3 h in furnace (XMT-TDW Model, 4kW, 220V-50Hz, 30A, 1000 C, China) to obtain the final powder with bright-black color.…”