Accession Number : AD0846927

Title :   An Apparatus for Evaluating the Dispersibility of Fine Powders.

Descriptive Note : Technical memo.,

Corporate Author : CHEMICAL RESEARCH AND DEVELOPMENT LABS EDGEWOOD ARSENAL MD

Personal Author(s) : Pistritto, J. V. ; Cogswell, R. V. ; Pieroni, J. K. ; Sneiderman, H. S.

Report Date : FEB 1964

Pagination or Media Count : 19

Abstract : An apparatus was constructed for evaluating the dispersibility of fine powders. It consisted of a 27-cu ft chamber into which 0.2-gm portions of powder are aerosolized with a specially designed powder-dispersing gun. The decay of the resulting aerosol cloud was assayed by light-scattering measurements at 90 deg. Saccharin and polystyrene were used to evaluate the apparatus. Saccharin was selected because it is a crystalline, organic, nonhygroscopic material, and polystyrene was chosen because of its spherical shape and uniform particle size. The addition of Cab-o-sil (5% by weight) to saccharin improved dispersibility under all experimental conditions. (Author)

Descriptors :   (*AEROSOLS, DISTRIBUTION), AEROSOL GENERATORS, PARTICLE SIZE, SCATTERING, STABILITY, DEGRADATION, TEST METHODS.

Subject Categories : Chemical, Biological and Radiological Warfare

Distribution Statement : APPROVED FOR PUBLIC RELEASE