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Factors affecting the oxidation of molybdenum disulfide MoS2

2021-02-04 10:46:16  Knowledge

Product Description of molybdenum disulfide MoS2

Molybdenum disulfide powder is a solid powder made from natural molybdenum concentrate after purification. The color is black with a silvery gray color, has a metallic luster, and feels slippery to the touch. It is insoluble in water, non-toxic and non-flammable.

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Temperature of molybdenum disulfide MoS2

Molybdenum disulfide starts to slowly oxidize at 400°C, and its oxidation product is molybdenum trioxide. The higher the heating temperature, the greater the amount of oxidation; the longer the heating time at a certain temperature, the greater the amount of oxidation.

Granularity:

The oxidation amount of molybdenum disulfide is also closely related to its particle size. The smaller the particle size, the greater the oxidation amount at a certain temperature and the same time.

Humidity of molybdenum disulfide MoS2

Humidity also has a great influence on the oxidation of molybdenum disulfide. Molybdenum disulfide is gradually oxidized at a certain temperature, and the participation of water can promote the oxidation of molybdenum disulfide.

Scope of application of molybdenum disulfide MoS2

1. Used to improve the sliding characteristics of machine parts, equipment and precision parts, especially for highly precise machined surfaces;

2. Used to fuse plastics, seals, packaging, and sintered metals to improve sliding characteristics;

3. For long-term lubrication or to provide life-long lubrication.

Advantages and utility

Reduce wear and friction, excellent extreme pressure resistance;

Molybdenum disulfide has a strong affinity for metals, so the effect is significant;

3. The sliding film is extremely thin to achieve minimum consumption;

4. Electrically, it has non-conductive and non-magnetized characteristics;

5. Chemically stable, but not resistant to halogen gas, concentrated sulfuric acid and nitric acid.

Simple method to distinguish molybdenum disulfide

Look at the color of molybdenum disulfide MoS2

Molybdenum disulfide is silver black with metallic luster; graphite is jet black with no metallic luster;

Touch:

Observe the adhesion of the powder on the hand: Molybdenum disulfide has better film-forming properties than graphite. After twisting, more powder is attached to the hand, while graphite is less attached;

Hydrophilicity of molybdenum disulfide MoS2

Molybdenum disulfide is insoluble in water. Pour molybdenum disulfide into water and stir thoroughly. After standing for a period of time, there will be oily film-like substances on the water surface. Graphite is more hydrophilic. Pour into water and stir well. After standing for a period of time, graphite Will sink and layer.

High temperature firing (above 400℃) of molybdenum disulfide MoS2

The color of the powder changes from black to white or yellow (yellow when molybdenum trioxide is heated, and white when cooled), then it is molybdenum disulfide.

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