Oil extrusion and constant pressure head methods to determine surface area of granular carbon powders
✍ Scribed by P.T. John; R.S. Sekhon
- Book ID
- 102993254
- Publisher
- Elsevier Science
- Year
- 1967
- Tongue
- English
- Weight
- 404 KB
- Volume
- 5
- Category
- Article
- ISSN
- 0008-6223
No coin nor oath required. For personal study only.
✦ Synopsis
Surface area of granular powders such as carbon powders used m the manufacture of cinema arc carbon rods, brushes etc. was determined by the method of oil extrusion. The granular powder thoroughly dispersed in anthracene oil of density d was poured into a Buchner funnel to a fell millimeters depth. An increasing suction pressure was applied till it reached the maximum possible value. Critical pressure PC at which rapid displacement of oil took place and v the volume of oil retained after complete extrusion of oil at pressure p, were observed and r the capillary radius corresponding to pc was determined. Then applying the above values of zs and r in an empirical equation similar to Wicke's equation, S the surface area was determined. The results were tested using Blaine's method and constant pressure head apparatus designed by the authors.