The difference between ferric oxide, iron oxide, ferrous oxide

Ferric oxide can be regarded as a mixture of iron oxide and ferrous oxide.

Iron oxide is also known as ferric oxide, where the valency of iron is 3-valent.

The valency of iron in ferrous oxide is 2-valent.

It should be so, and these are what I see from the Internet.

There are three oxides (iron oxide, ferrous oxide, ferric tetroxide).

Iron oxide (Fe2O3) is a reddish-brown powder, commonly known as iron red, which can be used as a pigment for paints, is a metal oxide, and can react with acids. fe2o3 + 6hcl=2fecl3+3h2o。

Ferrous oxide (FeO) is a black powder, unstable, heated in air, can be oxidized to Fe3O4, and reacts with acid (weakly oxidizing acid). feo+2hcl==fecl2+h2o。

Ferro-tetroxide is a black crystal with magnetic properties, commonly known as magnetic iron oxide, which is a complex oxide, in which 1 3 is Fe3 is Fe3+, Fe3O4 can be regarded as a compound formed by FeO, Fe2O3. [The essence is Fe(FeO2)2, ferrous metaferrite].

1. Fe Fe3O4: 3Fe+2O2==Fe3O4 (Condition: Heating or Ignition).

2. Fe Fe2O3: Fe Fe2+ (Fe reacts with acid to form ferrous ions, Fe2+ +2OH-==Fe(OH)2, 4Fe(OH)2 +O2+2H2O==4Fe(OH)3, 2Fe(OH)3==Fe2O3+3H2O (heating).

In addition, the main component of Fe rusting in humid air is Fe2O3·XH2O.

3. Fe FeO: Fe Fe2+ (Fe reacts with acid to form ferrous ions), Fe2+ +2OH-==Fe(OH)2 (isolated oxygen, can be protected by nitrogen), Fe(OH)2==FeO+H2O (heated, isolated oxygen, can be protected by nitrogen).

4. FEO or Fe2O3 or Fe3O4 Fe: The oxide of iron can be reduced by reducing gas such as carbon (C) or H2 or CO. For example, 3CO+FE3O4==3FE+3CO2

5. FEO FE2O3: 2FEO+3O2 2FE2O3 (the condition is high temperature or ignition in oxygen).

The thickness of the oxide film also varies depending on the environmental conditions at the time of oxidation.

At room temperature, the thickness of the oxide on the relatively slippery pure iron in dry air does not exceed 20 angstroms (1 angstroms = nanometers), but in the humid air the thickness of the oxide film increases significantly, and rust spots on the surface can be seen. At this point, the oxide deposition is layered, with a dense amorphous aquifer on the metal side and a thick porous hydration layer on the air side.

Iron and water vapor.

The reaction produces Fe3O4 and hydrogen. Fe3O4 has anti-corrosion effects, such as the bluing of steel parts (also known as burnt blue and baked blue).

It is the use of alkaline oxidation.

The oxidation of the solution forms a blue-black or dark blue Fe3O4 film on the surface of the steel workpiece, which is used to increase corrosion resistance, gloss and aesthetics.

The above content reference: Encyclopedia - ferric tetroxide.

1. The carbon content of pig iron and iron is different.

2. Iron oxide, ferric oxide, and ferrous oxide have different degrees of oxidation, that is, different oxygen content.

3. The valency of iron oxide, ferric tetroxide, and ferrous oxide is different.

Both pig iron and iron powder are black. Iron oxide.

The appearance is reddish-brown powder. Ferrous oxide FEO has a black powder appearance. Ferric oxide.

It is a magnetic black crystal.

Iron oxide is the main component of rust. The main cause of rust is that iron metal will rust in the presence of impurity carbon, which reacts with moisture and oxygen in the environment. It is used in paint, ink, rubber and other industries, can be used as a catalyst, glass, gemstones, metal polishing agent, can be used as a raw material for ironmaking.

The largest application of iron oxide is as a pigment.

According to the color, it is divided into iron oxide red, iron oxide yellow, iron oxide black, and iron oxide brown is mixed with iron oxide red, iron oxide black (and iron oxide yellow); Iron Oxide Orange is a mixture of Iron Oxide Red and Iron Oxide Yellow; Iron oxide green is a mixture of blue phthalocyanine orchid and iron oxide zhenhuang.

Main Uses of Iron Oxide:

1. It is used for coloring paints, rubber, plastics, buildings, etc., and is an inorganic pigment, which is used as an anti-rust pigment in the coating industry. It is used as a colorant for rubber, artificial marble, terrazzo on the ground, a colorant and filler for plastics, asbestos, artificial leather, leather polishing paste, etc., a polishing agent for precision instruments and optical glass, and a raw material for the manufacture of magnetic materials and ferrite components.

2. It is used for magnetic raw materials such as electronic industry, communication machines, televisions, computers, and ferrite cores for line output transformers, switching power supplies, and high U and high UQ.

3. Used as analytical reagents, catalysts and polishing agents, and also used as ingredients for pigments;

4. It is used for sugar-coating coloring of various tablets and pills;

5. Used as magnetic materials, pigments and reducing agents, polishing agents, catalysts, etc.; It is used for coloring tablets, icings and capsules, etc.;

6. Used as a pigment for anti-rust paint. The mica iron oxide anti-rust paint made of this product has good water permeability resistance and excellent anti-rust performance, which can replace Hongdan;

7. Edible red pigment. In Japan, it is used for red bean rice and konjac flour food. It is used to identify bananas that have been cut with preservatives. In the United States, it is mostly used for cat food, dog food and packaging materials;

8. Inorganic red pigments are mainly used for transparent coloring of coins, and are also used for coloring paints, inks and plastics;

9. Widely used in paint, rubber, plastic cosmetics, building fine grinding materials, precision hardware instruments, optical glass, enamel, stationery, leather, magnetic alloy and high-grade alloy steel coloring; It is mainly used as magnetic materials, pigments, polishing agents, catalysts, etc., and is also used in telecommunications and instrument industries; It is mainly used as magnetic materials, pigments, polishing agents, catalysts, etc., and is also used in inorganic red pigments in the telecommunications and instrument industries.

Ferric oxide, chemical formula Fe2O3. Red or dark red amorphous powder. The relative density is 5, and the melting point is 1565 (simultaneous decomposition).

Insoluble in water, soluble in hydrochloric acid and sulfuric acid, slightly soluble in nitric acid. Strong hiding and tinting strength, no oil permeability and no water permeability. It is stable in the atmosphere and sunlight, resistant to polluting gases, high temperature and alkali.

The crystalline particles of the dry process products of this product are coarse and hard, and they are suitable for magnetic materials and polishing and grinding materials. Wet products have fine and soft crystalline particles, which are suitable for the coating and ink industry.

Ferrous oxide, chemical formula FeO. It is one of the oxides of iron. It has a black powder in appearance, covalently bound to oxygen by iron in an oxidation state of +2 valence.

Its mineral form is galena (wüstite). Ferrous oxide is often confused with rust, but the main component of rust is hydrated iron oxide. Ferrous oxide is a non-integer compound in which the ratio of iron to oxygen varies from to.

Ferroferric oxide, chemical formula Fe3O4. Commonly known as iron oxide black, magnetite, black iron oxide, it is a magnetic black crystal, so it is also called magnetic iron oxide. Don't think of it"Ferrous metaferrate"[Fe(FeO2)2] cannot be regarded as a mixture of ferrous oxide (FeO) and iron oxide (Fe2O3), but it can be approximately regarded as a compound composed of ferrous oxide and iron oxide (FeO·Fe2O3).

This substance is soluble in acid solution, insoluble in water, alkali solution and organic solvents such as ethanol and ether. Natural ferric tetroxide is insoluble in acid solution and is easily oxidized into iron oxide (Fe O) in the air in a humid state. It is commonly used as a pigment and polishing agent, and can also be used in the manufacture of audio tapes and telecommunication equipment.

Melting point appearance: solid black crystal.

Application: Making magnets, tape recorder tapes.

Density molecular weight: .

Iron oxide is ordinary iron, ferrous oxide is generally sweet, primary iron oxide is pig iron, relatively speaking, fighting weapons, etc., the harder iron egg is more brittle, I want to say that ferrous oxide is a relatively soft iron sheet, saying steel and so on.

Iron oxide, ferrous oxide, and ferric oxide are as follows: iron oxide (Fe2O3) is a reddish-brown powder, commonly known as iron red, which can be used as a pigment for paint, and is a spike metal oxide, which can react with acid: Fe2O3 + 6HCl=2FeCl3+3H2O.

Ferrous oxide (FeO) is a kind of black powder, unstable, heated in the air, can be oxidized to Fe3O4, and acid (weakly oxidizing acid) reaction: FeO+2HCl==FeCl2+H2O. Ferric oxide is a magnetic black crystal, commonly known as magnetic iron oxide, which is a complex oxide of the Cha group, in which 1 3 is Fe 3 is Fe3+, Fe3O4 can be regarded as a compound formed by FeO and Fe2O3.

[The essence is Fe(FeO2)2, ferrous metaferrite].

Difference: The ratio of iron and oxygen is different.

Ferric oxide.

Fe3O4, ferrous oxide, FeO, ferric oxide.

i.e. iron oxide Fe2O3

Iron oxide is formed by the reaction of iron with oxygen at room temperature.

Ferric oxide is formed by the reaction of iron with oxygen at high temperatures or under ignition conditions.

Ferrous oxide is formed by the reaction of ferrous oxide with the oxygen of the poor hail at high temperatures (higher than the reaction temperature of ferric tetroxide).