Freeze Dryers - an overview ScienceDirect Topics
A vacuum spray freeze dryer may be used to produce spherical freeze-dried powders by freezing liquid droplets followed by drying in air under vacuum (e.g. −50–60C and 5–30 Pa). Drying is rapid due to the large surface area of the frozen material and there is a high uniformity in particle size (in the range 100–400 microns) that ...
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