Introduction to Manganese Dioxide, MnO2 powder
Manganese dioxide
Also known as black manganese oxide or manganese peoxide, it is also known. It is the oxide tetravalent mannese. The chemical formula for MnO2 is below. MnO2 has a chemical formula. Its fHm (298K), is -520.71kJ/mol. Its melting point is 847. Its density is 5.026g/cm3. Natural MnO2 is found in pyrolusite. It is either a black-brown rhombic crystal, or a powder. It is amphoteric and has a trihedral lattice. It is insoluble when dissolved in water and in nitric acid. However, it releases oxygen and forms manganese oxide in hot concentrated sulfuric acids. It is fused to caustic soda and oxidant and gives off carbon dioxide to make permanganate. Manganese dioxide can cause explosions or combustion through friction or coheating with organic matter, sulfur, or other oxidable substances, such as sulfide or phosphide. It is easily reduced by strong oxidants, such as hydrogen peroxide. When MnO2 in heated air is above 480, it becomes Mn2O3 or Mn3O4 and when heated above 9000. It is used widely in steelmaking and glass production, as well as ceramics and dry cells.
It can be found in the forms of pyrolusite, hard manganese ore and other natural forms. You can extract it from pyrolusite. You can also prepare it by heating manganese nitrate salt or electrolytic magnese dioxide. g -Mno2 has an active component and can be used for cathodes in batteries to prevent polarization. Manganese dioxide can also be used to remove rust, oxidize, dry battery drying agents, and paint drying agents. It is also used in manganese salt preparation, as well as the glass industry.
Manganese Dioxide MnO2 powder – Physical and Chemical Properties
For
manganese dioxide
Oxygen atoms are located at the corner of the Octahedron, and manganese is in the octahedron. Octahedrons can be linked to form single chains or double chains. This creates a tunnel structure in the gap, hexagonal dense, or square dense accumulation.
Oxidizability
Manganese dioxide is an organic non-salt, non-amphoteric and non-corrosive oxide. The presence of reducing agent can cause oxidizing. To make manganese oxide, you can heat hydrogen flow heating to 1400K. To produce brown and black manganese oxide, manganese dioxide is heated with ammonia gas stream. Concentrated hydrochloric acid is used to react manganese dioxide with chlorine gas and water.
It can also display oxidation reactions in the presence strong oxidants
Reductibility
. When the potassium nitrate and manganese carbonate are mixed melting, people get dark green melt. After cooling it in water, they can get six valences manganese compound potassium magnate. It is an oxidant that can be used in acidic mediums. Although it does not burn, it is strong oxidant and can be used in an acid medium to aid combustion.
| Manganese Dioxide MnO2 Powder Properties | |
| Other names | manganese oxide, MnO2 powder |
| No. | 1313-13-9 |
| Formula compound | MnO2 |
| Molecular Weight | 86.94 |
| Appearance | black powder |
| Melting Point | 535degC |
| Boiling Point | N/A |
| Density | 5.03g/cm3 |
| Solubility of H2O | Insoluble |
| Exact Mass | 86.9279 |
Applications of Manganese Dioxide, MnO2 powder
1. Manganese dioxide is an excellent decolorizing agent for the glass industry. It can oxidize low iron salt to high ferric sodium, so the blue-green glass becomes weak yellow.
2. It is used in electronic manufacturing to produce magnetic materials made of manganese, zinc ferrite and other metals.
3. This is used in the manufacture of iron and manganese alloys and as a heating agent for the casting industry.
4. Gas masks that absorb carbon monoxide.
5. It is used in the chemical sector as an oxidant or catalyst for organic synthesizing, paint, and ink dericcant.
6. It is used as an accelerant in the match industry, and as a raw ingredient for glaze medicine for ceramics, enamel, and manganese salt.
7. It is used for dyeing, water purification and iron removal.
8. An excellent depolarizing agent for batteries is electrolytic manganese oxide. It has a higher discharge capacity than the dry battery made from natural discharge manganese dioxide and a shorter life span. This makes electrolytic manganese a valuable raw material in the battery industry.
9. Because of its strong catalytic and oxidation/reduction, Ion Exchange, and Adsorption capacities, it makes a great water purification filter material. It is more effective at removing and decolorizing metals than activated carbon and zeolite.
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