GRADUAL AND COMBUSTIVE MECHANOCHEMICAL REACTIONS IN THE SN-ZN-S SYSTEM

摘要

The mechanochemical formation of ZnS from a mixture of Zn and S powders turns into a self-propagating thermal reaction after 30 min of milling. A similar ''explosion'' occurs when Sn and S are milled for about the same time to form SnS2. However, the ignition time is longer or the reaction is gradual in mixtures of the two systems. This phenomenon is investigated as a function of composition. A model is proposed based on the thermodynamic properties and mechanochemical reactions of the binary systems. (C) 1996 Academic Press, Inc. [References: 30]