Analysis of the Powder Composite Process by a Mechanical Method [Translated]†

Abstract

Recently, composite particles covered with different kinds of fine particles have been fabricated using various mechanical methods in a dry phase. However, the quantitative analysis of the composite process has not yet been conducted systematically. In this paper, a mechanical processing method called MECHANOFUSION was used to investigate the composite process of glass beads and titanium dioxide fine particles. As a first trial, the ratio of fine particles fixed onto core particles and the BET specific surface area of the processed particles were measured as a function of the processing time. Consequently, the composite process was described as the following two steps: The first is the adhering step whereby fine particles adhere to the core particles' surface, and the second is the compacting step of the fine particle layers. Furthermore, it was found that the BET specific surface area of the processed powder was correlated with the energy consumption per weight of material in the apparatus.† This report was originally printed in J. Soc. Powder Technology, Japan. 29(6), 434-439 (1992) in Japanese, before being translated into English by KONA Editorial Committee with the permission of the editorial committee of the Soc. Powder Technology, Japan.