下载次数：212次 浏览次数：499次发布时间：2015-11-16 16:53TSI’s Small-Scale Powder Disperser Model 3433 is used mainly for powder
sizing. The operator gently brushes the powder to be dispersed across one
of three annular rings of abrasive paper glued to the top of a turntable.
One end of a stainless-steel capillary is positioned just above the turntable,
the other in a venturi throat. A suction transmitted through the capillary
tube removes the powder from the surface of the turntable. Because the
air velocity in the venturi throat greatly exceeds that in the capillary tube,
shear forces are created where the two flows meet, causing the powder to
deagglomerate. The powder then enters an expansion cone, from which it
exhausts from the unit.
+ Generating aerosol for introducing powder into particle
sizing systems such as TSI ‘s Aerodynamic
Particle Sizer® (APS™) Spectrometer Model 3321
+ Dispersing dry polystyrene latex spheres (PSLs) for
use in calibrating measurement instruments
+ Redispersing airborne material collected on 25 and
37 mm diameter membrane filters used in
environmental monitoring
+ Inhalation toxicology studies, particularly in the
pharmaceutical industry
+ Deagglomerates most dry particles in the range from
0.5 to 50 μm
+ Selection of turntables available to meet specific
dispersion needs
+ Use as an APS spectrometer accessory for
particle-size-distribution measurements
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