Untersuchung des Einflusses von MoO3 Pulvereigenschaften auf die Reduktion zu MoO2

Molybdenum is largely produced using powder metallurgy. The properties of the molybdenum powder used for this are adjusted during the reduction process. It is important to have a precisely defined raw material in order to adjust important parameters such as the grain size or the surface area. In the industry, molybdenum trioxide is often used for this purpose, although not all process-influencing parameters of the powder are known. Therefore, the influence of the raw material on the reduction process is to be determined in the course of this work. The investigation will focus on the first reduction step to record characteristic values, determine the extent to which this influences the intermediate product molybdenum dioxide and how this can be counteracted with targeted process control. For this purpose, several samples are reduced in industry-related aggregates and the properties of the incoming and outgoing powder are recorded. In the event of changes in the raw material, possible deviations in the reduction product are documented and suggestions are made for necessary adjustments to the process control. The powder properties analysed are the particle size distribution, the morphology, the specific surface area and the potassium content of the raw material. In addition to the morphology and particle size distribution, the degree of reduction is also recorded for the reduction product.