Studium vlivu procesních parametrů výroby granulátu SMP na lisovatelnost feritového granulátu

Abstract

This diploma thesis investigates the influence of processing parameters in the production of SMP granulate on the compressibility of ferrite powder. The aim was to identify how various stages of the manufacturing process – particularly calcination, milling, binder addition and spray drying – affect the physical and mechanical properties of the granulate and its behavior during compaction. Four samples were analyzed using a combination of analytical techniques, including X-ray diffraction (XRD), bulk density determination, particle size distribution analysis, flowability tests, mechanical testing with the Powder Testing Center (PTC), and scanning electron microscopy (SEM). The results showed that sample A achieved the best compressibility due to balanced particle size distribution, favorable microstructure, and optimal flow properties. Other samples exhibited various limitations, such as increased agglomeration, reduced plastic deformability, or the need for excessive compaction pressure. A key finding is that compressibility is not governed by a single parameter but results from the complex interplay of material, technological, and microstructural factors. The production of ferrite granulate remains largely empirical and requires a holistic approach to achieve effective optimization.