Abstract
The objective of the present work is to develop a procedure for obtaining and characterization active silica with a high
specific surface area from rice husk ash. The relative amount of silica was increased after burning out the carbonaceous material
at different times and temperatures. A 95% silica powder could be produced after heat-treating at 700jC for 6 h. The specific
surface area of particles was increased after wet milling from 54 to 81 m
2
/g.
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