Preparation Process Analysis on BN Powder with High Specific Surface Area

The BN powder with high specific surface area was successfully prepared using an airtight high-temperature reactor with NH3 as the reaction atmosphere and protective atmosphere. The influences of raw material ratio and reaction temperature on the specific surface area of obtained BN powder were investigated through the analysis on the powder yield, purity and specific surface area. The results shows both of raw material ratio and reaction temperature have influence on the specific surface area of BN powder. And the reaction temperature has more influence. More important, the BN powder with a specific surface area of 279.62m2/g and an average pore diameter of 4.19nm was obtained by the optimum process.

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