Rice husk, a waste material, which first heated at uncontrolled temperature, is
crystalline in nature. Under controlled temperature of 650°C, the ash obtained is
amorphous and white in color. From this, 98% pure nanosilica is extracted by
precipitation method. HRHA and nanosilica are studied by SEM, which reveals that
the particle is in spherical shape in the agglomeration form with a dimension of 75-80
nm. XRD peak shows the peak intensity to be in amorphous phase. FTIR peak shows
the silixone groups Si-O-Si band at 1092 – 1100 cm-1 in HRHA and nanosilica. This
experimentation suggests that rice husk ash is an alternative source of amorphous
silica. The cost is supposed to be less but with equivalent properties.