Laboratory: Powder and paste rheology
Measured properties | Method/Measuring device |
---|---|
• Powder tap density | • Tapped density tester (Stav) |
• Powder bulk density | • ISO 697 bulk density measurement setup |
• Particle solid density | • Gas pycnometry (Quantachrome) |
• Powder compressibility | • Texture Analyser (Stable Micro Systems) with powder compression die |
Powder shear behavior: • Flowability ffc • Cohesion • Coefficients of inner/wall friction • Compression strength • Storage consolidation | • Ring shear testers (Schulze, Brookfield) • Heating/cooling cell for ring shear tests (temperatures -30 °C - +200 °C) • Translation shear tester (Jenike) • Powder stirrer rheometer (self-developed) • Storage shear cells for time consolidation measurements • Test setup for flow under vibration (self-developed) |
• Powder angle of repose | • Angle of repose setup (in air or liquid, vibration) (self-developed) |
• Moisture analysis (Sorption/desorption) | • Dynamic vapor sorption with Raman (SMS) • Infrared Moisture Analyser (Sartorius) • Controlled humidity/temperature chamber |
• Min. fluidization velocity | • Self-developed fluidized bed test setup for measurement of umf |
• Powder permeability (air or liquid) | • Self-developed fixed bed test setup for pressure drop measurement |
• Silo discharge/filling behavior | • Silo setup with adjustable hopper geometry: mass flow measurement/ |
• Blending behavior | • Blending continuous silos in lab. and pilot scale (height of 4 m) |
• Forces in silos | • Force measurement sensors in silos (lid, installations) |
• Rheology of complex | • Rheometer Rheostress 6000 (Haake), temperature range -5 - +200 °C |
Compounding/extrusion | • Twin Screw Extruder with two powder feeders, liquid injection system, |