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Mikael Nersesyan

Alexander Mukasyan

Vasiliy Mukasyan

Hayk Khachatryan

Surên Kharatyan

A method for synthesis of high surface-area (&#x3e;100 m/g) and nanosized (&#x2266;100 nm) silicon powder by initiation of self-sustained combustion reaction in a mixture of silicon dioxide and magnesium powders in a sealed reactor chamber under pressurized inert gas atmosphere. A specific feature of the method is rapid cooling of the product at a rate of 100 K/s to 400 K/s in the area directly behind the combustion front.

Method of manufacturing high-surface-area silicon

A method of manufacturing a silicon carbide powder with submicron size of powder particles wherein a homogeneous reactant mixture comprising a source of silicone, a source of carbon, and polytetrafluoroethylene is locally preheated in a sealed reaction chamber filled with an inert gas under pressure of 20 atm to 30 atm to a temperature sufficient to initiate an exothermic self-propagating reaction ranges from 650K to 900K. In the aforementioned homogeneous reactant mixture, the carbon source is used in the amount from 63 wt % to 68%, the silicon source is used in the amount of from 20 wt. % to 25 wt. %%, and the activated additive is used in the amount of from 8 wt. % to 15 wt. % per 100% of the entire homogeneous reactant mixture.

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St. Louis, MO, United States of America

Mikael Nersesyan