Study on synthesis and explosion properties of<br /> porous silicon/NaClO4 composite<br />
Journal Title: Science Paper Online - Year 2008, Vol 3, Issue 3
Abstract
Porous silicon is prepared by electrochemical oxidization method. The porosity and thickness of porous silicon prepared by different conditions as well as the influence of prepared conditions, concentration of sodium perchlorate solution and storage method on the explosive phenomena are researched in this paper. The results show that the porosity of porous silicon increase at the earlier stage, and decrease at the latter stage with the increase of current density and etching time; when current density is 50 mA•cm-2 and etching time is 30 min, porosity reached the maximum; increasing the concentration of hydrofluoric acid, the porosity will decrease; longer etching time would lead to thicker film depth. SEM analysis shows that porous silicon cracks on surface and forms silicon column in its internal. Porous silicon composite cannot explode prepared by small current density and short etching time; when the mass concentration of sodium perchlorate solution is higher than 98 g•L-1, the explosion phenomena are the most obvious; the best storage method of porous silicon composite is dipping in the absolute ethanol.
Authors and Affiliations
LI Xueming CHEN Jianwen
Keywords
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- EP ID EP134073
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