Ferrous oxide

Iron Titanates. Ferrous metatitanate [12168-52-4] FeTiO, mp ca 1470°C, density 472(0), an opaque black soHd having a metallic luster, occurs in nature as the mineral ilmenite. This ore is used extensively as a feedstock for the manufacture of titanium dioxide pigments. Artificial ilmenite may be made by heating a mixture of ferrous oxide and titanium oxide for several hours at 1200°C or by reducing a titanium dioxide/ferric oxide mixture at 450°C. 

Ferrous orthotitanate [12160-20-2] Fe2Ti04, is orthorhombic and opaque. It has been prepared by heating a mixture of ferrous oxide and titanium dioxide. Ferrous dititanate [12160-10-0] FeTi20, is orthorhombic and has been prepared by reducing ilmenite with carbon at 1000°C. The metallic ion formed in the reaction is removed, leaving a composition that is essentially the dititanate. Ferric titanate [1310-39-0] (pseudobrookite), Fe2TiO, is orthorhombic and occurs to a limited state in nature. It has been prepared by heating a mixture of ferric oxide and titanium dioxide in a sealed quartz tube at 1000°C. 

Phases Formed in Pordand Cements. Most clinker compounds take up small amounts of other components to form soHd solutions (11). Best known of these phases is the C S soHd solution called aHte. Phases that may occur Hi Portiand cement clinker are given Hi Table 1. In addition, a variety of minor phases may occur Hi Portiand cement clinker when certain minor elements are present Hi quantities above that which can be dissolved Hi other phases. Under reducHig conditions Hi the kiln, reduced phases, such as ferrous oxide [1345-25-17, FeO, and calcium sulfide [20548-54-3] CaS, maybe formed. 

More reduced forms of oxide are present beneath the rust layer. Hydrous ferrous oxide (Fe0 nH20), that is, ferrous hydroxide [Fe(OH)2l... 

Geothite is produced by air oxidation of alkaline suspension of ferrous hydroxide (Sada etal., 1988). As a starting material for ferrous oxide, the preparation of fine particles with prescribed size, size distribution and shape is required in its application to magnetic materials for recording tapes and disks. With increasing oxidation rate, the crystal size decreases and the size distribution becomes sharper (Sada etal., 1988). The first step of the reaction. 

Eisenoxydul, n. ferrous oxide, iron(ll) oxide. — salpetersaures —, ferrous nitrate, iron(ll) nitrate (and so for other salts). 

Higher and lower oxides are distinguiahed as -oxyd and -oxydvl Eisenoxyd, ferric oxide Eisenoxydul, ferrous oxide) or by Latin forms (Ferrioxyd, ferric oxide Ferrooxyd, ferrous oxide). 

Iron (E>rrio). . Ferrous Carbonele Forrr)js Hydroxide Ferrous Oxide, . Forroua Sulfate Ferrous Sulfate Ferrous Sulfate.. ... 

Since cyclones rely on centrifugal force to separate particulates from the air or gas stream, particle mass is the dominant factor that controls efficiency. For particulates with high densities (e.g., ferrous oxides), cyclones can achieve 99 per cent or better removal efficiencies, regardless of particle size. Lighter particles (e.g., tow or flake) dramatically reduce cyclone efficiency. 

The structure of millscale consists of three superimposed layers of iron oxides in progressively higher states of oxidation from the metal side outwards, viz. ferrous oxide (FeO) on the inside, magnetite (Fe304) in the middle and ferric oxide (Fe203) on the outside. The relative portions of the three oxides vary with the rolling temperatures. A typical millscale on 9.5 mm mild steel plate would be about 50/tm thick, and contain approximately 70% FeO, 20% Fej04 and 10% FejOj. 

Wustite (FeO) is a ferrous oxide that may be formed in lower pressure boilers where poor removal of DO takes place. It is often found as a core component of tubercle deposits. The formation of octahedral crystalline FeO is not stochiometric, being slightly deficient in iron. 

Wustite FeO Ferrous oxide formed in LP boilers with poor DO removal. Develops as the core of tuberculation deposits. 

Ferrous oxide (FeO) and hydrated iron oxide (FeOOH) can be found as a bright red to red-brown, light and fluffy deposits under various conditions, such as in cold FW tanks and freshly acid-washed or wet laid-up boilers. 

The original method of polymers stabilization was invented by Gladyshev and coworkers [14-18]. They proposed to introduce in polymer a metal compound inert toward dioxygen. This compound is decomposed at elevated temperatures with production of a thin metal powder. Formates, oxalates, and carbonyls of metals were suggested as predecessors of an active metal powder. For example, ferrous oxalate decomposes at 600-630 K with the formation of pyrofore iron and ferrous oxide... 

White, A. F. (1990), "Heterogeneous Electrochemical Reactions Associated with Oxidation of Ferrous Oxide and Silicate Surfaces", Reviews in Mineralogy 23,467-509. 

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