فرمت فایل دانلودی: .pdf
فرمت فایل اصلی:
حجم فایل: 427
قیمت: 3750 تومان
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دانلود مقاله :
Cohesion of lactose powders at low consolidation stresses
نویسنده :
Horng Yuan Saw , Clive E. Davies, Jim R. Jones, Guillaume Brisson Anthony H.J. Paterson
فرمت:pdf
چکیده :
The flow characteristics of a powder system are known to be influenced by particle size distribution, par-
ticularly the content of fine particles, and interparticle forces. This paper reports an investigation that has
identified and quantified links between physical properties, viz size distribution, bulk density and particle
density, and cohesion in compacted beds of powder. An annular shear cell was used in the determination
of the cohesion of cohesive and free-flowing milled lactose powders at low consolidation stresses in the
range 0.31–4.85 kPa and under ambient conditions. Following consideration of the compaction and
shearing processes, it was postulated and confirmed that cohesion could be expressed as a function of
powder surface area per unit volume and dimensionless preconsolidation stress. It was shown that care
is needed in the measurement of surface–volume mean diameter when applying correlations developed
from the experimental data.
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