BS 4359-2:1982
Current
The latest, up-to-date edition.
Determination of the specific surface area of powders Recommended air permeability methods
Hardcopy , PDF
English
31-12-1982
Foreword
Cooperating organizations
Methods
0 Introduction
1 Scope
2 Definitions
3 Symbols
4 Principles
5 Apparatus: general
6 Preparation of the powder bed
7 Measurement of permeability
8 Variables affecting the result
9 Reporting
Appendices
A Measurement of the effective solid density of a
powder
B Lea and Nurse constant flow rate method
C Fisher sub-sieve sizer constant flow rate method
D Rigden constant volume method
E Blaine constant volume method
F Test for bed uniformity
G Sources of reference materials for air permeability
measurements
Tables
1 Variation of air viscosity with temperature
2 Density of pure water, rho w
3 Indicated diameter correction factors for a sample
volume v1 of 1.25 cm3
Figures
1 Permeability cells
2 Lea and Nurse apparatus with pressure drop flowmeter
3 Schematic diagrams of Fisher sub-sieve sizer and
sample tube
4 Rigden apparatus
5 Blaine apparatus
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