Iron oxide
Fe3O4 is an inorganic material with a chemical composition of Fe3O4. The magnetic black crystal is called magnetic iron dioxide.
The black Fe3O4 is an iron oxide with mixed valence, melting at 1597degC. It has a density of 5,18g/cm3. Fe3O4 Powder is not soluble with water, but is soluble with acid solutions. At room temperature, it appears as magnetite. It has a high conductivity and strong submagnetism.
Fe3O4 exhibits anti-corrosion properties. In the case of bluing steel parts, also known as blue-burning or baking blue, an alkaline-oxidizing solution is used to produce a dark-blue or blue-black Fe3O4 coating on the steel surface. Used to improve corrosion resistance, aesthetics and gloss.
1. Precipitation methods
The precipitation process is widely used to prepare nanoparticles because it is easy, inexpensive, yields a high purity product, has a uniform composition, is scalable, and can be done at large scales. The most common precipitation methods are co-precipitation and hydrolytic precipitation. Ultrasonic precipitation is also used, as well as alkoxide hydrogenation and chelate breakdown.
2. Hydrothermal (solvothermal method)
Hydrothermal reaction (solvothermal) is the general term used for chemical reactions which are carried out under high pressure and temperature in fluids, such as aqueous (organic) solvents or steam. The Fe3O4 obtained by hydrothermal means has a very small particle, a particle size that is relatively uniform, and does not need high-temperature pretreatment.
3. Microemulsification method
The microemulsification technique is the process of forming an emulsion from two immiscible solutions under the influence of surfactants. In this method, amphiphilic molecule divides the continuous medium in tiny spaces that form a small reactor, where the reactants are able to react and form a solid. The microreactor limits the nucleation, growth of crystals, coalescence, agglomeration processes, so that nanoparticles are formed with a surfactant layer and have a specific structure and morphology.
4. Sol-gel method
The method is based on the hydrolysis of metal alkoxides, followed by polymerization to produce a uniform sol containing metal oxides or hydroxides. They are then concentrated into a clear gel. The gel is dried, and then heat-treated in order to obtain superfine powder.
Tech Co., Ltd. is a professional oxide powder We are a chemical product supplier with 12 years experience. We accept payments by Credit Card, T/T (West Union), Paypal and T/T. The goods will be shipped to overseas customers via FedEx or DHL.
You can contact us for Fe3O4 powder of high quality. Contact us Send an inquiry.
Iron Oxide Fe3O4 Powder Properties
Ferric oxide cannot be dissolved in organic solvents, such as water or alkali solutions. Natural ferroferric dioxide is insoluble when dissolved in acid. It is readily oxidized in the humid air to iron oxide (Fe2O3).The black Fe3O4 is an iron oxide with mixed valence, melting at 1597degC. It has a density of 5,18g/cm3. Fe3O4 Powder is not soluble with water, but is soluble with acid solutions. At room temperature, it appears as magnetite. It has a high conductivity and strong submagnetism.
Fe3O4 exhibits anti-corrosion properties. In the case of bluing steel parts, also known as blue-burning or baking blue, an alkaline-oxidizing solution is used to produce a dark-blue or blue-black Fe3O4 coating on the steel surface. Used to improve corrosion resistance, aesthetics and gloss.
Iron Oxide Fe3O4 Powder Preparation
Traditional methods include microemulsification (solvothermal), precipitation, hydrothermal method and sol-gel.1. Precipitation methods
The precipitation process is widely used to prepare nanoparticles because it is easy, inexpensive, yields a high purity product, has a uniform composition, is scalable, and can be done at large scales. The most common precipitation methods are co-precipitation and hydrolytic precipitation. Ultrasonic precipitation is also used, as well as alkoxide hydrogenation and chelate breakdown.
2. Hydrothermal (solvothermal method)
Hydrothermal reaction (solvothermal) is the general term used for chemical reactions which are carried out under high pressure and temperature in fluids, such as aqueous (organic) solvents or steam. The Fe3O4 obtained by hydrothermal means has a very small particle, a particle size that is relatively uniform, and does not need high-temperature pretreatment.
3. Microemulsification method
The microemulsification technique is the process of forming an emulsion from two immiscible solutions under the influence of surfactants. In this method, amphiphilic molecule divides the continuous medium in tiny spaces that form a small reactor, where the reactants are able to react and form a solid. The microreactor limits the nucleation, growth of crystals, coalescence, agglomeration processes, so that nanoparticles are formed with a surfactant layer and have a specific structure and morphology.
4. Sol-gel method
The method is based on the hydrolysis of metal alkoxides, followed by polymerization to produce a uniform sol containing metal oxides or hydroxides. They are then concentrated into a clear gel. The gel is dried, and then heat-treated in order to obtain superfine powder.
Tech Co., Ltd. is a professional oxide powder We are a chemical product supplier with 12 years experience. We accept payments by Credit Card, T/T (West Union), Paypal and T/T. The goods will be shipped to overseas customers via FedEx or DHL.
You can contact us for Fe3O4 powder of high quality. Contact us Send an inquiry.