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The effect of powder feeding conditions on initial porosity in the interference region between two feeding points: feeding outlet diameter and height

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A method for homogeneous powder packing into a cell is expected to be developed in both the fine ceramics and electronics industries. However, the method has not yet been developed sufficiently. In this paper, as a first step in the discussion of homogeneous powder packing, the powder porosity in the interference region between two feeding points into a cell is experimentally observed and analyzed by X-ray radiography. In particular, the effect of powder feeding height on the powder porosity in the interference region are noticed experimentally. The following conclusions are obtained. (1) For silica sand, the effect of powder feeding outlet diameter on the powder porosity in the interference region is seen to be larger than that of the powder feeding height. (2) However, for alumina powder, no effect of the powder feeding diameter and the powder feeding height on the powder porosity can be observed.

Affiliations: 1: Department of Chemical Engineering for Resources, Mining College, Akita University, Akita 010, Japan


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