Abstract: The microgravity in out space provides human being a quite special environment for exploring new laws and new preparation methods of materials, because the convection, deposition, floating, and hydrodynamic pressure, which have great effects on the preparation of materials, disappear in microgravity environment. The internationally historical and current studies on materials under microgravity, and the study results in this field achieved in China are introduced in this paper.

Key words: Microgravity, Space materials science, convection, floating,
Hydrodynamic pressure