Porosity

Porosity refers to the volume of void spaces within a material, influencing its ability to absorb, retain, or transport fluids and gases. This property is critical in industries like construction, filtration, and pharmaceuticals, where porosity affects strength, permeability, and functionality.

On this page, learn about the principles of porosity, its measurement techniques, and how it impacts material performance in various industrial applications.

Featured Porosity Articles

  • X-ray micro-CT pore network diagram showing open and closed porosity in a powder particle compared to gas pycnometry and BET surface area

    X-ray Micro-CT for Powder Pore Networks: What It Adds Beyond Gas Pycnometry and BET Surface Area

    Gas pycnometry and BET surface area each report a single number. X-ray micro-CT builds a three-dimensional map of the pore network, showing connectivity, tortuosity, and closed porosity that single-value tests cannot resolve, within real resolution and sample-size limits.

  • Porosity in food powders

    Functional Importance of Porosity in Food Powders

    Article updated February 2026 Porosity controls hydration speed, dissolution, compressibility, and storage stability in food powders because it sets how easily water and gases access the particle interior. Define a target porosity window for the product intent, for example, instant rehydration in spray-dried powders versus shelf stability in denser milled powders, then [...]

  • Three Petri dishes with metal, ceramic, and polymer powders, plus a spatula pouring metallic powder, illustrating powder testing circular economy.

    Powder Technologies Within Circular Systems

    The relevance of powder testing for circular economy powder usage. Circular production changes powder behavior across cycles. Therefore, measure oxidation, moisture, morphology, and flow every loop. Set clear release criteria. Track energy and carbon per cycle to keep quality stable. Table of contents The circular [...]

  • Hard carbon powder for sodium-ion battery use, shown in dry-room conditions with stable structure.

    Hard Carbon in Sodium-Ion Batteries: Moisture Control, Powder QA, and Line Readiness

    Hard carbon sodium-ion batteries are a match made in heaven. When moisture stays low and surface area remains controlled. A disciplined dry-room setup, paired with tight powder QA, improves Coulombic efficiency and shortens formation cycles. It all starts with the powder. Table of contents Sodium-ion [...]

  • 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, [...]

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