IMPROVEMENTS IN SILICA AEROGELS

摘要

THIS INVENTION RELATES TO SILICA AEROGELS AND TO A METHOD FOR THEIR PREPARATION FROM RICE HUSK. RICE HUSK IS VERY RICH IN SILICA, AND ITS ASH CAN CONTAIN UP TO 92-97% OF AMORPHOUS SILICA. THE RICE HUSK ASH IS PREPARED Y BURNING THE RICE HUSK ON A HEATING PLATE WITH EXCESS AIR UNTIL THE WHITE ASH IS OBTAINED . SILICA FROM RICE ASH HUSK IS IN A VERY ACTIVE FORM AND HAS BEEN FOUND TO BE A VERY POTENTIAL STARTING MATERIAL FOR SILICA AEROGELS.