Cohesion

Cohesion refers to the force that holds particles of the same material together, influencing the behavior of powders and bulk solids. This property plays a critical role in industries like pharmaceuticals, food, and chemicals, where material flowability, packing density, and processing efficiency are directly impacted.

On this page, explore the principles of cohesion, its effects on material performance, and strategies to optimize particle behavior for improved industrial applications.

Featured Cohesion articles

  • Technical hero image for a PowderTechnology.info Monthly Know-How on Hausner Ratio and Carr Index, showing two graduated cylinders with loose and tapped powder, three different powder mechanism backgrounds, the Hausner Ratio and Carr Index formulas, a workflow from result to next test, and a reference to an included practical interpretation guide.

    Hausner Ratio and Carr Index: What the Numbers Tell You and Where They Break Down

    Both the Hausner Ratio and Carr Index reduce bulk and tapped density to a single number. The mechanism behind that number, whether aeration, particle shape, or surface cohesion, determines whether it supports a process decision or actively misleads one.

  • Close view of mixed industrial powder with visible size contrast, suggesting flow and segregation behavior

    The Dictators of Powder Behavior: A practical guide to powder behavior control in production

    Powder behavior control starts with fifteen core factors. Tune particle size, shape, surface energy, moisture, charge, and environment. Use ring shear, Hausner ratio, and DEM insights to design predictable flow, mixing, and compaction. Table of contents Powder behavior control starts with particle size, it sets [...]

  • Catalytic hot spots in powders shown by a lab setup with a Karl Fischer titrator, a weigh boat of powder, and a microbalance on a clean bench.

    Catalytic Hot Spots in Powders: Small Regions, Big Consequences

    Catalytic hot spots in powders often determine stability. Detect them early with targeted screening. Reduce mobility, limit contact, and lower energy to control risk. Confirm improvements with defined stress holds and retests. Why Catalytic Hot Spots in Powders Matter Powders may look uniform. Their chemistry rarely is. [...]

  • Dry electrode battery manufacturing line with powder handling equipment and automated feeders.

    Dry Electrode Battery Manufacturing: Powder Rules for Modern Factories

    Dry electrode battery manufacturing demands tighter powder control. Flow, moisture, and morphology define stability, yield, and cost. Table of contents Dry electrode battery manufacturing is no longer a niche R&D ambition. Instead, it is rapidly moving into large-scale production. The attraction is clear: lower costs, [...]

  • Photorealistic image showing a powder sample undergoing high-speed mixing or compression testing, with visible instrumentation capturing thermal or mechanical responses.

    Energetic States and Chemical Dynamics in Powder Systems

    Energetic states in powder systems depend on more than material composition. Internal coherence, entropy gradients, and surface energy determine how powders respond to mechanical, thermal, and environmental stress. Controlling these energetic variables enables predictive processing, coating performance, and long-term stability. Table of contents Introduction: From [...]

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More Cohesion Articles

Editor’s Picks

Poorly Soluble APIs: How Surface Contact Shapes Dissolution and Bioavailability

Categories: Analytical Techniques and Methods, Editors pick, Feature Article, Particle Size Testing, Pharmaceutical Industry, Surface Energy, Wettability

Powder Segregation Diagnosis During Mixing, Conveying, and Filling

Categories: Conveying, Editors pick, Feature Article, Flowability, Mixing technology, Segregation, Uncategorised

Why Bulk Powder Behavior Depends on Contact Networks, Not Just Particle Size

Categories: Bulk Solids Characterization, Editors pick, Flowability, Insights

Why Free-Flowing Powders Still Arch in Hoppers, and How to Diagnose the Real Cause

Categories: Editors pick, Feature Article, Flowability, Hoppers

Functional Importance of Porosity in Food Powders

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