Evaporation Coated Tantalum Particles

The liquid phase modification process is characterized by particle dispersion in the liquid phase and adsorption of the modifier, evaporation coating tantalum particle modification effect is stable, the modifier in the particle surface adsorption uniform, complete, but the particles if applied in the dry state, but also need to undergo drying treatment, the modification process is complex and costly.

The dry modification process is characterized by particle dispersion in the dry state, by spraying modifier or modifier solution, at a certain temperature so that the modifier adsorption on the surface of the particles to complete the surface modification of the particles. The modification method is flexible, simple, and low cost, but it is difficult to achieve uniform treatment of particles of the modification process.

The vapor phase modification process is characterized by the dispersion of the modifier in the gas phase can be uniformly adsorbed on the surface of the particles, the particle modification effect is stable, compared with the liquid phase processing equipment, the modified powder does not need to be dried. However, due to the limitations of the gas-solid separation technology in the modification process, it is difficult for the gas-phase treatment equipment to modify the surface of submicron particles.

The mechanical force chemical treatment process is characterized by the addition of modifiers for surface modification treatment while the particles are crushed, and the surface modification treatment of the particles is carried out while the particle size of the powder is reduced. Due to the crushing process, the particles will produce a large number of highly active nascent surfaces, and the strong mechanical action during the crushing process can activate the surface of the particles, effectively improving the adsorption of the modifier on the surface of the particles. The process can be combined with particle crushing and surface modification, simplifying the processing process of particles, and can improve the efficiency of particle crushing and enhance the effect of particle surface modification. However, due to the modification process, the particles are constantly crushed, resulting in a new surface, the particle surface is difficult to completely adsorb the modifier.

The high-energy radiation modification process is characterized by directly changing the particle surface charge and changing the nature of the particle surface through high-energy radiation, or using high-energy radiation to enhance the adsorption of organic modifiers on the particle surface and better modify the surface of evaporation coated tantalum particles.

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