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Application of Nanometer Iron Oxide Fe3O4 Powder

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Overview of Nanometer Iron Oxide Fe3O4 Powder

Iron oxide  is an inorganic substance with the chemical formula Fe3O4. It is a magnetic black crystal, so it is also called magnetic iron oxide. Iron oxide is insoluble in water, alkaline solution, ethanol, ether and other organic solvents. Natural iron oxide is insoluble in acid solution, and is easily oxidized to iron oxide (Fe2O3) in the air under humid conditions. It is commonly used as a pigment and polish, as well as in the manufacture of audio cassettes and telecommunications equipment.


Ferric oxide is ferromagnetic, and if the particle radius is on the nanometer scale, it is called a ferromagnetic particle.

The nanometer Fe3O4 powder is magnetic and can achieve directional motion in an external magnetic field. When the particle size is within a certain range, it has superparamagnetic properties and can generate heat in the external alternating electromagnetic field. Chemical properties are stable.

Black Fe3O4 is a mixed valence oxide of iron with a melting point of 1597 ℃ and a density of 5.18g/cm3. It is insoluble in water, but soluble in acid solutions. It occurs in nature in the form of magnetite, which is strongly submagnetite and highly conductive at room temperature.

Fe3O4 is formed when iron wire burns in oxygen.

When iron comes into contact with air, it forms oxides on its surface, and the composition of the oxide film itself is not uniform. For example, a piece of mild steel can be covered with three oxide films: FeO when in contact with metal, Fe2O3 when in contact with air, and Fe3O4 in between. Instead, it can be a mixture of saturated solid solutions of the three oxides that form an oxide film on the surface of the steel.

Meanwhile, the thickness of the oxide film varies depending on the environmental conditions at the time of oxidation. At room temperature, the oxide layer thickness of relatively pure iron in dry air does not exceed 20 angstroms (1 angstrom = 0.1 nm). However, the thickness of the oxide film increases significantly in humid air, and rust spots are visible on the surface. At this time, the oxide deposition is layered, with a dense amorphous anhydrous layer on the side near the metal and a thick porous hydration layer on the side near the air.

Iron reacts with water vapor to form Fe3O4 and hydrogen.

Fe3O4 has anti-corrosion effect. For example, the bluing of steel parts (also known as bluing and baking blue) is made by the oxidation of alkaline oxidizing solution to form a blue-black or dark blue Fe3O4 film on its surface. Steel parts surface, increase corrosion resistance, gloss and beauty.

Application of Nanometer Iron Oxide Fe3O4 Powder

Iron oxide Fe3O4 powder, commonly known as black iron oxide, magnetite and black iron oxide, can be used in many different fields, for example: iron oxide (II, III) as black pigment, also known as mars black.

Used as a catalyst in the Haber process.

For water gas shift reaction.

In contrast, Fe3O4 nanoparticles are used in MRI scans.

It prevents the steel from rusting.

It is an ingredient in aluminates, which are used to cut steel.

Iron oxide Fe3O4 powder is ferromagnetic. If the radius of the particles formed is on the nanometer scale, they are called ferromagnetic particles.

1. Iron oxide Fe3O4 powder can produce magnetic recording materials, high gradient magnetic separators, wave absorbing materials, special coatings, etc.

2. Iron oxide Fe3O4 powder is widely used as the carrier of various pharmaceutical ingredients to form a magnetic targeted drug delivery system; it is used for the separation of magnetic immune cells, nuclear magnetic resonance imaging and so on.

3. For precision instruments, gas sealing, vacuum sealing, etc.

Nano iron oxide Fe3O4 powder price

The price of nano-iron oxide Fe3O4 powder will change randomly with the production cost, transportation cost, international situation and market supply and demand of nano-iron oxide Fe3O4 powder. Tanki New Materials Co.,Ltd aims to help various industries and chemical wholesalers find high-quality, low-cost nanomaterials and chemicals by providing a full range of customized services. If you are looking for nano iron oxide Fe3O4 powder, please feel free to send an inquiry to get the latest price of nano iron oxide Fe3O4 powder.

Supplier of Nano Iron Oxide Fe3O4 Powder

As a global supplier of nano-iron oxide Fe3O4 powder, Tanki New Materials Co., Ltd. has extensive experience in the performance, application and cost-effective manufacturing of advanced and engineered materials. The company has successfully developed a series of powder materials (including boron carbide, aluminum carbide, titanium carbide, etc.), high-purity target materials, functional ceramics and structural devices, and provides OEM services.

Other NamesIron(II,III) oxide,Iron Oxide Fe3O4 Nanopowder,
       CAS No.1317-61-9
   Compound FormulaFe3O4
    Molecular Weight233.53
     AppearanceBlack Powder
    Melting Point1597 °C
     Boiling PointN/A
      Density4.8-5.1 g/cm3
   Solubility in H2ON/A
      Exact Mass231.784471

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