Pre-mixing dispersion of MLCC materials with the corn mill "MKO".

In dispersion engineering, stable quality cannot be achieved solely based on the performance of the equipment. What is important is the overall design of the process, taking into account material properties and process conditions. This is referred to as dispersion process design. Dispersion quality is determined not only by the strength of shear but also by multiple factors such as flow state, residence time, and method of input. If these conditions are not properly designed, localized agglomeration or variation can occur, making it difficult to maintain stable quality. For example, poor wetting during powder input or the occurrence of stagnant areas due to flow bias can lead to clumping or dispersion issues. Additionally, even if the shear energy is sufficient, if it does not act uniformly on all particles, differences in dispersion state will arise. Therefore, in dispersion processes, it is crucial to design "flow," "shear," and "processing time" as an integrated system. This allows for all particles to receive the same dispersion history, achieving uniform and highly reproducible dispersion quality. In particular, inline continuous processing has the advantage of maintaining consistent conditions within the flow, making it easier to ensure reproducibility in process design. Dispersion process design is a key concept for stabilizing quality and successfully scaling up.

In dispersion engineering, issues such as unresolved agglomeration, sedimentation, and unstable particle size distribution occur frequently at many sites. These problems are caused not only by the performance of the equipment but also by inconsistencies in particle characteristics, dispersion conditions, and process design. For example, when there is insufficient dispersion energy, particles do not break down to primary particles, and agglomeration remains. Additionally, if the shear conditions or flow state are not appropriate, uniform dispersion cannot be achieved, leading to sedimentation and variations in quality. Particularly in high-viscosity systems or high solid content slurries, even slight differences in conditions can significantly impact the results. Furthermore, in batch processing, variations in mixing uniformity and residence time make it difficult to ensure reproducibility. To resolve these dispersion issues, it is important to optimize the entire process, including particle characteristics, dispersion energy, and flow design, rather than simply changing the equipment. By maintaining consistent conditions, as in inline continuous processing, stable dispersion quality and reproducibility can be achieved.