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Generation and Design of Nanoparticles by Glatt Powder Synthesis
Powders with particles in the nano and micrometer range are used in many areas today. Glatt powder synthesis is a thermal process for processing, generating or coating of micro- and nanoparticles.
Due to their high specific surface area, such powders exhibit very high reactivity, which manifests itself, for example, in better catalytic properties or lower sintering temperatures. The high flexibility of the dissolved raw materials in combination with the extremely high cooling gradients after synthesis, enables the extraction of powders with phase states beyond thermodynamic equilibrium, which also often exhibit improved properties compared to the equilibrium state. You will get micro- and nanoparticles with unique particle structures. This innovative technology allows to design powders with the highest degree of purity, narrow particle size distribution, specific surface area, highest homogeneity, and without hard aggregates.
Glatt powder synthesis is also used as a process for the production of core-shell particles – the coating of micro- and nanopowders. For this purpose, raw material suspensions are used as raw materials. By using organic solvents and low process temperatures, temperature-sensitive coating materials (e.g. polymers) can also be applied. At the same time, reactor temperatures of up to 1300°C also allow the core material and coatings to be chemically combined to produce novel composite materials. Typical applications of this technique are in the field of pigments and catalytic powders, but also increasingly in energy materials. The applied coating can be used as a protective layer or introduce new functions.
Particle design with Glatt powder synthesis: Process steps of spray calcination such as drying, calcination and particle formation are combined in a single step to generate micro- and nanoparticles with specific properties.
Core-Shell coating and functionalization with Glatt powder synthesis: Suspensions are sprayed during coating. The coating material is dissolved and dried onto the core material and is subsequently thermally treated, i.e. calcinated to get micro- and nanoparticles with specific properties.