Abstract

The production of fine high purity tin powders suitable for use in chemical catalysis has been investigated. Ultrasonic atomisation gave a greater fraction of fines and a more homogeneous size distribution than conventional gas atomisation. The use of repeated solid state transformation between the grey and white allotropes of tin, which can be performed at low temperature and involves a large volume change, has been found to be an excellent means of breaking up atomised powder into fine particles of high specific surface area

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