What is Fe3O4?
Iron oxide (Fe3O4) powder is the pure powder form of the corresponding nanocrystals without solvents. However, the well-passivated surface with organic ligands prevents the nanoparticles from aggregating. The magnetic iron oxide nanocrystals from NN-Labs take advantage of the strong magnetic properties of iron oxide and incorporate them into nano-scale materials. The iron oxide nanoparticles in powder form demonstrate excellent size distribution characteristics, which allow for their use in high-level applications where strict control over the nanocrystals' properties and characteristics is necessary. These high-quality iron oxide nanocrystals display exceptional magnetic properties, nearing those of pure/bulk iron oxide, and the magnetic nanoparticle powder can be biofunctionalized for numerous applications.
Thermal, Magnetic and Physical Properties of Fe3O4
Fine particles could adopt a single-domain magnetic structure when their size falls below a critical value. In the case of these particles, the magnetic property and their response to an external magnetic field are defined and determined by their thermal energy and magnetic anisotropy energy barrier resulting in a superparamagnetic property at specific and characteristic temperatures called blocking temperature. Iron oxide is classified among the particles and materials with super magnetic properties when its particle size is reduced to a desired macron and nano size. Accordingly, this class of particles has been investigated predominantly for their applications in various sectors of technology and biomedicine, and so forth 1. Iron oxide is generally an electrically conductive material whose conductivity is one million times as high as that of Fe2O3. Fe3O4 appears to adopt ferromagnetic properties at a Curie temperature of 585°C. The excellent electrical conductivity of Fe3O4 compared to Fe2O3 could be ascribed to electron exchange between the Fe2+ and Fe3+ cations.
The chemical structure of iron oxide is based on a cubic inverse single group structure
Comprising a packed array of neighboring cubes, the Fe2+ ions occupy half of the octahedral sites, with Fe3+ cations being split evenly across the unoccupied octahedral and tetrahedral sites. Fe3O4 samples are non-stoichiometric, where the temperature-dependent ferromagnetism originates from the coupling of spins of Fe2+ and Fe3+ electrons in the octahedral sites. Therefore, the octahedral and tetrahedral sites induce the magnetic field, giving it permanent magnetism. Synthetic and natural magnetic crystals adopt opaque jet-black color and metallic luster. The density of Fe3O4 is 5.18 g/cm3, a bit lighter than the reddish-brown Fe3O4. Generally, Fe3O4 magnetite particles exhibit a hardness of 5.5, similar to glass at ambient temperatures. Effective surface areas of magnetite differ based on the preparation method and how certain procedures lead to coarser and finer particles. Nevertheless, common micro-scale particles with diameters of 0.2 µm approximately exhibit higher surface areas.
It should be noted that Magnetite particles are not porous. In the case of solubility, Fe3O4 dissolves much faster than other iron oxides. The melting and boiling points Fe3O4 are as high as 1590 and 2623 °C, respectively, with the fusion heats, vaporization, and decomposition as 138.16 and 298.0, and 605.0 kJ/mole, at elevated temperatures of 2623 °C.
Price of Fe3O4
Fe3O4 particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Fe3O4. A large amount of large amount will be lower. The Price of Fe3O4 is on our company's official website.
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