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Magnetic Material Fe3O4 Powder Introduction

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Update time : 2021-07-20 10:44:26
Ferroferric oxide is an inorganic substance with a chemical formula of Fe3O4. It is a magnetic black crystal, so it is also called magnetic iron oxide.

Fe3O4  Powder Properties

The black Fe3O4 powder is a mixed valence oxide of iron. It has a melting point of 1597°C and a density of 5.18g/cm3. It is insoluble in water and soluble in acid solutions. Fe3O4 appears in the form of magnetite in nature, at room temperature. It has strong submagnetism and high conductivity.

Combustion of iron wire in oxygen will generate ferroferric oxide. Comparing the free energy of Gibbs generated by the standard mole of iron oxide, it is concluded that Fe3O4 has the greatest thermodynamic stability, so the product is Fe3O4.

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


Fe3O4 Powder Applications

Magnetic iron oxide is widely used in various industries.
Ferroferric oxide is a commonly used magnetic material.
Specially made pure ferroferric oxide is used as raw material for audio tapes and telecommunications equipment.
Fe3O4 is a natural magnetite which is the raw material for iron smelting.
Fe3O4 powder is used to make primer and topcoat.
Ferric oxide is the main raw material for the production of iron catalyst (a kind of catalyst).
Fe3O4 has great hardness and can be used as abrasive. It has been widely used in the field of automobile braking, such as: brake pads, brake shoes, etc.
Ferroferric oxide has been recognized in the field of domestic welding materials, and the production of welding rods and wires is still in its infancy, and the market prospect is very broad.


Fe3O4 shows good performance in sewage treatment due to its high specific gravity and strong magnetism.
Ferroferric oxide can also be used as a pigment and polishing agent.
We can also use certain chemical reactions, such as the use of sodium nitrite, etc., to form a dense layer of ferroferric oxide on the surface of steel to prevent or slow down the corrosion of steel, such as the bluing of firearms, saw blades, etc. Blackened, it is commonly known as "baked blue".
Fe3O4 powder is used to make special electrodes.

Luoyang Trunnano Tech Co., Ltd (TRUNNANO) is a professional oxide powder supplier with over 12 years experience in chemical products research and development. We accept payment via Credit Card, T/T, West Union and Paypal. Trunnano will ship the goods to customers overseas through FedEx, DHL, by air, or by sea.

If you are looking for high quality Fe3O4 powder, please feel free to contact us and send an inquiry.
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