What is it? Fe3O4 Pulp ? Fe3O4 (inorganic substance) has the chemical formula Fe3O4. It is a magnet black crystal and is therefore also known as magnetic iron dioxide. It is not considered ferrous metaferrite [Fe(FeO2)2] nor can it be considered a mixture (FeO2O3) of iron oxide and ferrous dioxide. However, it could be considered ferrous oxygen. A compound consisting of iron and iron oxide (FeO*Fe2O3). This substance is insoluble when it comes into contact with water, alkaline solution, and organic solvents such ether and ethanol. Insoluble in acid solution, natural ferricoxide is easily oxidized into iron oxide (Fe2O3) when the environment is humid. It is commonly used as a pigment or polishing agent. However, it can also serve to manufacture audio tapes and telecommunications equipment.
Fe3O4 powder’s key features
Black Fe3O4 is an iron valence oxalate with a melting temperature of 1597degC, and a density at 5.18g/cm3. It is insoluble and soluble in water. It can be found as magnetite in nature.
Ferromagnetic or ferrimagnetic substances undergo second-order phase changes above the Curie temperatures and become paramagnetic substances. The Curie temperature is 585 for Fe3O4. Ferric oxide is formed when iron wire is heated in oxygen. Comparing the standard mole iron oxide to produce Gibbs free energy, it was found that Fe3O4 has a greater thermodynamic stability. The product is Fe3O4. Iron oxides form when iron comes in contact to air. This is because the chemical compositions of the oxide films are not uniform. Three oxide films can be applied to a piece low-carbon steel: FeO covers the metal, Fe2O3 covers the air and Fe3O4 covers the metal. The oxide film may consist of a mixture of solid saturated solutions of the three different oxides. The oxide film’s thickness can vary depending on how it is oxidized in different environments. At room temperature, the oxide film thickness on relatively pure iron is not more than 20 angstroms (1.angstrom = 0.1nm). But, it can be seen that the thickness of the film in humid air increases dramatically, leading to rust spots. This is when the oxide deposition is layered. The metal side is covered by a dense anhydrous layer and the air side is covered with a porous hydration layer. Fe3O4 and Hydrogen are formed when iron reacts to water vapor. Fe3O4 has an anti-corrosion property. To blue steel parts (also known under the names bluing and baking), you use an alkaline-oxidizing solution to form a Fe3O4 coating on the steel surface. It is used to increase gloss, corrosion resistance, and aesthetics.

Iron Oxide Properties
Other Titles	Magnet black, fenosoferric dioxide, ferro ferricoxid Ferroferric Oxide, Fe3O4
No.	1317-61-9
Combination Formula	Fe3O4
Molecular Weight	233.53
Appearance	Black Powder
Melting Point	1597 degC
Boiling Point	N/A
Density	4.8-5.1 g/cm3
Solubility of H2O	N/A
Exact Mass	231.784471

Fe3O4’s applications
1. Ferric oxide can be used as a magnetic material.
2. As a raw material for recording tapes or telecommunication equipment, a special made pure ferric dioxide is used.
3. This is used for topcoats or primers.
4. Ferric oxide is the main ingredient for the production iron catalyst (a catalyst).
5. In the field of domestic welding materials ferric oxide has been recognised. The production of welding wires and electrodes is still in its infancy and there is a lot of potential.
6. Ferric oxide is a strong magnet and has a high specific gravity, which makes it an excellent choice for wastewater treatment.
7. Also, ferric oxide can be used as a polishing and pigment agent.
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