Technology
Repeatable Sample Loading
Accurate results depend on repeatable powder sample preparation. The accessory’s unique loading tools and automated conditioning procedures reduce sample-to-sample variability to as low as 0.2%.
Temperature Control
The DHR offers complete powder rheology testing with controlled temperature to predict powder behaviors under a wide range of environmental conditions. The SmartSwap™ Peltier Concentric Cylinder Jacket offers a versatile, convenient, and safe solution for every powder testing method: Shear, Flowability, Wall Friction, and Compressibility.
Powder temperature is controlled through direct conductive heating and cooling. Sample temperature uniformity is achieved through an upper heat shield and composite heat-break geometries preventing thermal gradients. Peltier technology enables sample heating up to 150 °C and cooling down to -10 °C without the need for liquid nitrogen or mechanical chillers.
Flow Cell
An impeller rotor is moved helically through the powder, measuring torque and force to report unconfined and confined Total Flowability Energy.
Flow Sample Volume: 21.2 mL
Shear Cell
Powder is consolidated in a serrated cup and plate and slowly sheared until yield under varying normal stress, reporting cohesion, yield strength, flow function and more.
Shear Sample Volume: 13.1 mL
ASTM D7891
Wall Friction
Consolidated powder interactions with a solid surface are directly measured, reporting Wall Friction Angle. Interchangeable smooth and rough steel plates are included, with options for different materials.
Wall Friction Sample Volume: 13.1 mL
ASTM D7891
Compressibility
Pre-conditioned powder is subjected to incrementally increasing normal stresses, monitoring the decrease in sample volume as powder is compressed and reporting % Compressibility under specified normal stress.
Compressibility Sample Volume: 21.2 mL