Abstract
1. BET methods and measurement of H2 chemisorption have been combined to determine the rate of new surface formation in the milling of quartz, corundum, silicon, germanium dioxide, molybdenum disulfide, and boron nitride. The second of these two methods can be used to determine the rate of new surface formation in the latter stages of the milling process where the BET method is no longer applicable because of particle aggregation. The work required for the formation of unit new surface area has been estimated. 2. Adsorptional methods have been used to detect and study the disorganization of the pre-surface layer structure and the effect of this factor, first on the dissolution of argon during solid body milling (silicon, quartz, GeO2) and then on the low-temperature sintering of materials such as MoS2.
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