A Preparation System for Grinding Brittle Materials to Submicron and Nano Particles via Mechanical Comminution

Abstract

Among industrial and laboratory-scale mills currently employed for producing submicron and nano particles, the high energy media mills occupy an important place. The strength characteristic of ultra-fine particles of brittle materials is analyzed, and the size effect of ultra-fine particle is considered. A kind of high energy media mills i.e. a stirred media mill designed and manufactured. Based the stirred media mill, the corresponding process route by wet grinding and the preparation system via mechanical comminution for grinding submicron and nano particles of brittle materials are proposed and built. Experiments were made through the stirred media mill with different size of the grinding media and at different levels of rotational speed of the mill and the grinding time, and at a fixed filling ratio with unitary size of the grinding media. From the experiment results, it is expected that the preparation system and the corresponding process route based on the stirred media mill is suitable to grind particles to submicron and nano size range for brittle materials.