pulveraktig

Pulveraktig is a Swedish term used to describe a material that has the form or texture of a powder. It indicates that the substance consists of very small particles that can be easily separated from one another and dispersed in air, producing a dust-like appearance or feel. Pulveraktiga materials typically have small particle sizes, a high surface area, and can range in their flow properties from freely flowing to prone to caking depending on moisture, compaction, and the presence of binders or additives.

The term is used across several fields. In everyday language, it describes foods such as flour, powdered sugar, or cocoa powder. In chemistry, materials science, and materials processing, it refers to powders used for blending, compaction, or sintering, for example metal powders, ceramic powders, or pharmaceutical powders. In geology or volcanology, ash and other finely fragmented materials can be described as pulveraktig. In a wet environment, pulveraktig substances may form pastes or slurries rather than remain freely powdery.

Safety and handling considerations are important for pulveraktig materials. Fine powders can be inhalation hazards and, in some cases, pose dust explosion risks when dispersed in air and exposed to an ignition source. Proper ventilation, dust collection, personal protective equipment, and adherence to relevant safety standards are common practices in industrial settings.

Characterization of pulveraktig substances often involves particle-size analysis (sieve or laser diffraction), microscopy, and assessments of flowability and moisture sensitivity. These measurements help determine handling, mixing, and processing requirements for the material.