# particle size

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## particle size

[′pärd·ə·kəl ‚sīz]
(geology)
The general dimensions of the particles or mineral grains in a rock or sediment based on the premise that the particles are spheres; commonly measured by sieving, by calculating setting velocities, or by determining areas of microscopic images.
(metallurgy)
The average and controlling lineal dimension of an individual particle of metal powder as determined by suitable screens or other methods of analysis.
McGraw-Hill Dictionary of Scientific & Technical Terms, 6E, Copyright © 2003 by The McGraw-Hill Companies, Inc.

## particle size

1. In evaluating the efficiency of a filter for removing particles from an air stream, the minimum particle diameter in microns that will be removed by the filter.
2. In paints, the diameter of a pigment or latex particle; usually expressed in mils or microns.
McGraw-Hill Dictionary of Architecture and Construction. Copyright © 2003 by McGraw-Hill Companies, Inc.
References in periodicals archive ?
Udden-Wentworth scale is the most widely used size grading at present.
Stage Sample Fitted curve [alpha] [beta] Stage 1 1# k = 13979 f([phi]) + 0.39638 13979 0.396 2# k = 14632 f([phi]) + 0.05796 14632 0.058 3# k = 16233 f([phi]) + 0.18146 16233 0.181 Stage 2 1# k = 817 f([phi]) + 1.33911 817 1.339 2# k = 1042 f([phi]) + 1.38474 1042 1.385 3# k = 812 f([phi]) + 1.26588 812 1.266 Stage 3 1# k = 1016 f([phi]) + 3.37391 1016 3.374 2# k = 1021 f([phi]) + 4.57822 1021 4.578 3# k = 1097 f([phi]) + 3.18941 1097 3.189 Stage Sample [R.sup.2] Stage 1 1# 0.881 2# 0.940 3# 0.987 Stage 2 1# 0.944 2# 0.925 3# 0.998 Stage 3 1# 0.983 2# 0.999 3# 0.996 TABLE 3: Udden-Wentworth scale and ff.
The mean particle size of all bench samples was 0.081 mm (0.003 in) (sd = 0.2 mm [0.008 in], n = 308), which classified as fine sand on the Udden-Wentworth scale (Udden 1914; Wentworth 1922).

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