Materials and Energy Research Center (MERC) Iranian Ceramic Society (ICERS) Advanced Ceramics Progress 2423-7477 2 1 2016 02 01 Optimization of the nanoporous silicon structures by magnesiothermic reduction of the as-synthesized silica 32 37 70016 10.30501/acp.2016.70016 EN Mahya Nangir semiconductors, MERC Abozar Massoudi Semiconductors , Materials and Energy Research Center (MERC) Rahim Yazdani Rad Semiconductors, MERC Seyed Ali Tayebifard Semiconductors, MERC 0000-0003-3117-177X Journal Article Nanoporous silicon powder was produced via efficient magnesiothermic reduction. In this work, the thermal effect and reduction process time were investigated on the porous silicon structure. The nanoporous silicon powders were characterized by  X-ray diffraction analysis and field emission scanning electron microscopy. The results demonstrate that porous structure was changed to homogeneous and uniform porous structure when the heating ramp rate was controlled at 5 0C/min. The average pore size of uniform porous silicon was reported 195.8 nm. https://www.acerp.ir/article_70016_3059569fef80027b8fed7f87b5bb2eaf.pdf