Mikroagglomeroitu

Mikroagglomeroitu, or microagglomerated, refers to the formation of small particle clusters within powders where primary particles bind together to create aggregates on the micrometer scale. These microagglomerates typically range from a few micrometers up to tens of micrometers in size and can occur during handling, milling, drying, or storage.

The formation mechanism is driven by interparticle forces, including van der Waals attractions, capillary bridges from trace moisture, hydrogen bonding, and sometimes electrostatic interactions. The tendency to form mikroagglomeroitu is influenced by factors such as moisture content, particle size distribution, surface chemistry and roughness, particle shape, and the processing history of the material. Environmental conditions like humidity and temperature during processing also play a role.

Implications of mikroagglomeroitu affect powder behavior and product quality. They can alter flowability, cohesion, bulk density, and pourability, making handling and metering more challenging. In pharmaceutical and food industries, microagglomerates can influence dissolution rates, uniformity of mixtures, and tablet or capsule integrity. In ceramics and mining, agglomerates can impact compaction, sintering, and material consistency.

Measurement and control methods include imaging and particle-size analysis (e.g., microscopy, laser diffraction), as well as assessment of flow properties and bulk density. To reduce or manage mikroagglomeroitu, engineers may adjust moisture control, apply anti-caking agents, modify surface properties through coatings or additives, or employ controlled milling and granulation to break up or homogenize aggregates.

See also: agglomeration, deagglomeration, granulation, powder flow.