What is Iron oxide?
Iron oxide films can show very different stoichiometries due to the flexibility of their Fe oxidation state (Fe2 +/Fe3 +). This flexibility is accompanied by the formation of various single-crystalline phases (e.g., hematite, magnetite, maghemite, and wüstite) with different chemical and physical properties. Therefore, iron oxide films are of interest in different fields as heterogeneous catalysis or spintronics and a deeper understanding of the epitaxy of iron oxide films are of strong interest.
Iron oxide is commonly reduced to a lower oxide or metal by gaseous carbon monoxide or solid carbon. The production of iron is performed in blast furnaces using carbon in the form of coke as the reductant and in gas-particle reactors producing directly reduced iron. An understanding of the gas or carbothermic reduction of iron oxide requires various types of diagrams. An overview of the oxygen-rich part of the system as a typical temperature/composition phase diagram, but overlaid with lines of constant pCO2/pCO ratio (Muan 1965). Wustite (FexO) is a solid solution phase in which x ranges from 0.95 at iron saturation to between 0.95 and 0.86 at magnetite saturation. The phase boundary between gas and carbon (graphite) at 1 atm is shown by a dash–cross line. The shaded area is metastable with respect to the precipitation of graphite at a pressure of 1 bar. The position of the carbon–gas-phase boundary is a function of pCO+pCO2 as discussed. For practical processes the reduction of iron oxide by CO occurs mainly in the temperature range 550–1200 °C.
Improved Dispersibility of Nanosized Iron Oxide Red Particles
Iron oxide has been used in many kinds of industrial applications because it is a rich element on the Earth and a multifunctional material. α-Fe2O3 (hematite) is the most popular material and it is often called “Bengara” or iron oxide red. Bengara has a long history from ancient wall painting. α-Fe2O3 particles are manufactured by various procedures today. An example of manufacturing process. One of the most popular methods is wet synthesis, where iron sulfate and sodium hydrate are added to neutral reaction and oxidized to get iron oxide precursors such as Fe3O4 and α-FeOOH. Then the precursors are heated to derive α-Fe2O3 particles. Final particle size and distribution are almost decided by precursor's characteristics. Nanosized α-Fe2O3 particles have lower hiding power and can be applied for colorant particles as trans-iron oxide red, which have higher light transparency in coated films. Especially, a suitable trans-iron oxide red particle could be derived from nanosized acicular α-FeOOH precursors.
Price of Iron oxide
Iron oxide particle size and purity will affect the product's Price, and the purchase volume can also affect the cost of Iron oxide. A large amount of large amount will be lower. The Price of Iron oxide is on our company's official website.
Iron oxide supplier
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