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How does particle size effect voiding? 


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Particle size significantly affects voiding in various materials. Smaller particle sizes generally lead to higher voidage. In the case of solder paste used in surface mount technology, voiding is influenced by factors like decreasing solderability of metallisation, decreasing flux activity, and increasing metal load of powder. Additionally, in soil properties evaluation, the minimum void ratio is impacted by particle size distributions and shapes, with more irregular particle shapes leading to larger minimum void ratios. Moreover, in waste processing using mechanical biological treatment, the permeability of samples decreases with smaller particle sizes, indicating a relationship between particle size and void formation. Therefore, particle size plays a crucial role in voiding behavior across different materials and applications.

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Particle size affects voiding by influencing permeability; smaller particles result in lower permeability due to decreased void ratio, while larger particles lead to higher permeability in waste materials.
Particle size affects voiding, as observed in the study using glass beads. Smaller particles result in increased voidage. However, even non-porous glass beads were not ideal for void volume measurements.
Journal ArticleDOI
W.B. Hance, Ning-Cheng Lee 
34 Citations
Particle size has a negligible effect on voiding in SMT. Smaller solder powder particles do not significantly impact void formation during reflow processes.
Particle size affects voiding by influencing the minimum void ratio of sand; as fines content increases, the minimum void ratio initially decreases, reaching a minimum at around 40%.

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