Crystallinity and electrical properties of silicon dioxide (SiO2) from rice straw

Rice straw is agro-waste that contain celluloses (32–47%), hemicelluloses (19–27%), lignin (5-24%) and ash (13–20%). The ash of rice straw has a high component of silicon dioxide (SiO2). This study aims to determine the effect variation of temperature on the extraction process, to assess crystallinity and electrical properties of silicon dioxide from rice straw. Based on the results and analysis, the influence of the combustion shown that the increase in temperature, will reduce the purity of the silicon dioxide. The composition of each treatment still contained the impurities at 3% of HCl solution consisted of carbon, calcium, and potassium. The structural characteristics obtained are samples in the amorphous phase. The electrical components of the sample are semiconductors and have the best dielectric constant at a temperature treatment of 800 C.