Powder surface modification has important practical significance for improving the performance of the powder.Spherical powder has good fluidity due to its spherical structure, larger specific surface area and its own physical and chemical properties, making it more play a role in the field of application.
Particle surface modification and spheroidization is a technical process that treats the surface of particles using physical, chemical, mechanical, or other means. It alters the particles' surface chemical composition, structure, morphology, or energy state, thereby optimizing their surface properties (such as hydrophilicity/hydrophobicity, dispersibility, adsorptivity, and compatibility).
Its core purpose is to solve the problem of "mismatch between the inherent surface properties of particles and application requirements". For example, when natural mineral particles are hydrophilic but need to be used in oil-based systems, or when nanoparticles tend to agglomerate but require monodispersed use, surface modification and spheroidization can make the particles suitable for the target application scenarios, and ultimately improve the overall performance of the materials (such as the mechanical strength of composite materials, the stability of coatings, and the activity of catalysts).
Optimize modifiers/spheroidizing agents based on particle properties (e.g., composition, surface charge) and application needs (e.g., silane for inorganic particles, low-melting binders for brittle ones).
Pre-treat raw particles to remove impurities and reduce agglomeration (e.g., ultrasonic dispersion) for uniform contact with agents/equipment.
Precisely control key parameters (temperature, time, mechanical force) to match particle size/materials, ensuring optimized surface properties and ideal sphericity.
Select suitable equipment (e.g., plasma devices for fine particles, fluidized bed spheroidizers) to ensure stable processes and uniform treatment effects.
Post-treat particles (e.g., proper drying to remove solvents, sieving) to improve product uniformity and performance stability.
Establish real-time monitoring (e.g., laser particle size analyzers, FTIR) and adjust parameters promptly to avoid deviations and ensure optimal effects.
