The result found that Rice husk ash, sugarcane leaves ash, Straw ash and Plam petiole ash at all sintering temperatures and Bagasse ash at 800 and 1,000 C have silica content of > 50 wt.%. The main phase of Rice husk ash, sugarcane leaves ash, straw ash, Plam petiole and Bagasse ash was found to be Silicon dioxide , form.