What is spherical molybdenum powder
As an important intermediate product of rare metal molybdenum, molybdenum powder (Mo) often reacts with oxidants to form molybdenum compounds such as molybdenum oxide, molybdenum sulfide, molybdenum carbide, molybdenum fluoride and molybdenum chloride due to its strong reducibility. , These molybdenum compounds are processed into molybdenum rods, molybdenum electrodes, molybdenum bars and other molybdenum products after a series of treatments. However, due to the different particle shapes of Mo powder, the physical and chemical properties and specific uses of molybdenum products are also different. According to the different particle shapes, Mo powder can be divided into spherical molybdenum powder and irregular molybdenum powder.
Properties of spherical molybdenum powder
Spherical molybdenum powder is a kind of metal molybdenum in powder state, and its chemical composition is Mo, Al, Ca, Cu, Ni, Si, Fe, Mg, C, N, O and other elements.
The appearance of spherical molybdenum powder is gray metal powder, the purity is as high as 99.95%, the melting point is 2622°C, the boiling point is 4825°C, the density is 10.3g/ml, the sphericity is as high as 98%, and it has good chemical stability, electrical and thermal conductivity, and corrosion resistance. , heat resistance, wear resistance and corrosion resistance characteristics. In addition, there are characteristics such as large specific surface area, excellent fluidity, high bulk density and tap density.
Under the detection of TopSizer laser particle size analyzer, the particle size of spherical molybdenum powder shows a unimodal normal distribution, and it can be seen that the particle size is uniform.
When the particle size is between 5-25um, D10 is 5-10um; D50 is 15-20um; D90 is 20-25um.
When the particle size is between 15-53um, D10 is 15-20um; D50 is 25-35um; D90 is 45-50um.
When the particle size is between 45-75um, D10 is 45-55um; D50 is 55-65um; D90 is 70-75um.
When the particle size is between 45-105um, D10 is 80-90um; D50 is 110-125um; D90 is 135-150um.
Production method and use of spherical molybdenum powder
1. Clamp the molybdenum bar blank in the insulating water-cooling jacket, so that the gap between the end of the molybdenum bar blank close to the molybdenum disc electrode and the molybdenum disc electrode is 1mm;
2. Power on the molybdenum disc electrode and the molybdenum rod blank, and increase the voltage until the molybdenum rod blank and the molybdenum disc electrode discharge. During the discharge process, the end face of the molybdenum rod blank close to the molybdenum disc electrode is continuously melted into spherical molybdenum powder.
Widely used in rubber, plastics, paper, coatings, paints, inks, pharmaceuticals, textiles, switches, targets, etc.
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