Iron Oxides


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Iron Oxides

 

compounds of divalent and trivalent iron with oxygen: ferrous oxide, FeO; ferric oxide, Fe2O3; and fertosoferric oxide, Fe3O4. Natural iron oxides (the minerals hematite, Fe2O3, and magnetite, Fe3O4) are raw materials in producing iron. Iron oxides are used as pigments; ferromagnetic iron oxides (Fe3O4 and γ-Fe2O3) are used in making magnetic materials.

References in periodicals archive ?
* Metaflake Aluminum Pigments * Transparent Iron Oxides
Ferros micronized iron oxides, which are mostly used in specialized plastics and coatings applications, are produced in Girardota.
Quartz grains with iron oxides along subparallel cracks characterise the iron sandstone layer over the full length of the exposure at Kasangulu and over its full thickness, and they are also recognised for the lower second layer at this site.
The newest Lanxess Inorganic Pigments iron oxide processing operation, located in China's Ningbo Petrochemical Economic & Technology Development zone, recently received the National Green Plant certificate.
* Generally speaking, what are the pros and cons of iron oxides in coatings?
In harmony with Figure 3, multicomponent nanoparticles contain FeS and iron oxides. Once FeS thin film contacted with free heavy metals in the pore water of soil samples, [S.sup.2-] promptly reacted with the toxic metals, forming chemically stable sulfides [41-43] because their solubility products favored the reaction (KspCu = ~[10.sup.-47]; [K.sub.sp,Cu] = ~[10.sup.-29]; and [K.sub.sp,Ni] = ~[10.sup.-1]2) [44].
Based on the chemisorption mechanism, it is proposed that the free iron oxides are assumed to completely react with [H.sub.2]S and solid-phase product is iron sulfide.
Experiments were conducted to measure the performance of several ESAs and red and black iron oxides. The impacts of each additive on mold/core properties and casting quality were measured in order to provide some insight on which sand additive should be used to achieve particular casting results.
Under the terms of the agreement, HORN will represent Applied Minerals as the exclusive sales distributor for the latter's DRAGONITE halloysite clay and AMIRON advanced natural iron oxides throughout the Western US.
For superparamagnetic iron oxide nanoparticles, Fe is being reused/recycled by cells using normal biochemical pathways for the Fe metabolism [1-3].
Most magnetic particles or beads currently used in those applications are based on iron oxides with low specific magnetic moments less than 50 emu/g.