The Uniaxial Powder Tester (UPT) from Freeman Technology is a unique stand-alone uniaxial shear tester for simple, sensitive and cost-efficient powder characterisation. The instrument delivers repeatable and reliable measurements, providing a robust, cost-effective alternative to traditional powder testing techniques.
Uniaxial testing first involves the construction of a consolidated powder column. This is then removed from its confining sleeve before being fractured through the application of a vertical stress, directly measuring the uniaxial Unconfined Yield Strength (uUYS). This technique can therefore be used to assess and rank the flowability of powders.
Cohesive powders have relatively strong inter-particulate forces, which encourage the particles to stick together rather than moving easily relative to one another. By contrast, in free-flowing powders, the tensile forces between particles tend to be much weaker.
Uniaxial testing is a direct and reliable method for measuring uUYS (σc) and Flow Function of powders.
The UPT is available in manual and advanced versions. Both deliverthe same highly repeatable data with the advanced version offering increased levels of automation and reduced operator input.