PowderTechnology.info

Solve powder problems at the root.

From visible behavior to defensible process decisions

PowderTechnology.info helps engineers, scientists, QA and QC teams, formulators, and process specialists connect visible powder behavior to credible mechanisms, relevant measurements, and controlled process decisions.

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Troubleshoot a problem

Start with poor flow, caking, dust, segregation, dosing, moisture, electrostatics, or particle breakage.

Understand powder behavior

Explore cohesion, friction, packing, moisture, permeability, electrostatics, particle size, and other mechanisms behind bulk behavior.

Choose a test method

Connect an engineering question to measurements that can distinguish likely causes, test assumptions, and support a defensible decision.

Process & equipment

Connect material behavior to storage, discharge, conveying, feeding, mixing, milling, and other process and equipment decisions.

Find your route

From a symptom to the right technical route

Powder problems rarely fit into a single category. Poor flow, caking, dust formation, dosing variation, or particle breakage can show up in many industries, but the likely cause depends on the material, process step, equipment, and measurement method. Work through the three steps below to get a route that fits your situation.

1Symptom
2Industry
3Your route

Step 1 — What problem are you seeing?

Not sure which fits? Browse all symptoms or start with powder behavior.

Step 2 — What is your industry?

Step 3 — Your route

Latest from PTI

The newest Featured Article, Insight, Know-How guide, and Guest Author contribution, with new technical publishing throughout the week.

Featured Article

Continue exploring PowderTechnology.info through our featured articles, weekly insights, practical monthly know-how guides, and expert guest authors.

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Engineering tools

Put powder data to work

Use a calculator directly, or jump to another engineering question. PTI tools are designed to narrow the problem and make the assumptions visible before you act on the result.

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Carr Index & Hausner Ratio

Enter bulk and tapped density in any consistent unit (g/mL, kg/m³). The classification follows USP <1174>.

Bulk (poured) density Tapped density

Hausner ratio—

Carr index—

Enter both densities to see the flow classification.

Read this before you act on it. Hausner ratio is a screening indicator of compressibility, not a measurement of flow under your process stresses. It cannot tell you whether cohesion, wall friction or permeability is the limiting mechanism — only a shear cell and wall friction test can. Open the full Carr/Hausner calculator or choose the right flow test.

Other useful calculators

Jump directly to six common calculations, or open the complete tools and calculators hub below.

PSD AnalyzerD10, D50, D90, and span from cumulative PSD data.

Flow Function / ffcInterpret cohesive strength against consolidation stress. $Void fraction and porosity calculator$ Void Fraction / PorosityCalculate bed void space from bulk and particle density.

Bin / Vessel CapacityEstimate powder mass from geometry and bulk density.

Minimum fluidization velocity calculator

Minimum Fluidization VelocityEstimate when a powder bed begins to fluidize.

Moisture Basis ConverterConvert moisture between wet basis and dry basis.

Explore all tools & calculators

Explore PTI

Browse by behavior, process, measurement, or industry

Use the main technical hubs to move directly into the part of PTI that matches your question.

Powder Behavior

Flow, cohesion, packing, moisture, segregation, electrostatics, particle size, and other material behaviors.

Process & Equipment

Storage, discharge, conveying, mixing, feeding, milling, classification, and other unit operations.

Test Methods

Characterization and measurement routes for particle, bulk, flow, moisture, surface, and mechanical properties.

Industries

Apply powder science in pharmaceutical, food, chemical, energy, materials, agriculture, and other process industries.

Why PTI

Technical information organised around engineering decisions

PTI is structured to help you move from an observed problem to a plausible mechanism, a relevant measurement, and a better-controlled process decision.

Problem-led

Start with observed powder behavior and production problems rather than assuming the cause.

Measurement-aware

Connect plausible mechanisms to measurements that can distinguish between them and test assumptions.

Cross-industry

Use relevant knowledge across pharmaceuticals, food, chemicals, energy, advanced materials, agriculture, and more.

Evidence-linked

Connect practical guidance to technical literature, standards, test methods, and transparent sourcing.

Laboratory perspective

Grounded in practical powder characterization

PowderTechnology.info is a spin-out from Delft Solids Solutions, a specialist laboratory for powder and particle characterization. That laboratory background informs the way PTI approaches measurement and industrial powder problems, while PTI operates as an independent technical publishing and knowledge platform.

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Bring technical experience into the conversation

PTI welcomes technically substantive contributions from industry specialists, researchers, equipment suppliers, laboratories, and experienced practitioners.

Pitch a technical storyPropose a technically useful article, case, method, or engineering perspective for editorial consideration.Pitch a story → Participation & partnershipsExplore ways to contribute expertise, technical material, events, research, or other relevant collaboration.Explore participation →

Particle characterization

Particle size, morphology, and related measurement questions.

Bulk powder behaviour

Flow, packing, density, handling, and mechanical response.

Surface & porous properties

Surface area, porosity, adsorption, and related material characteristics.

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