University of Guilan Chemistry of Solid Materials 2 1 2015 06 22 Role of gel aging in template-free synthesis of micro and nano-crystalline sodalites 21 31 1259 EN S. M. Pourali University of Mazandaran A. Samadi-Maybodi University of Mazandaran Journal Article 2014 08 17 A  facile  effective  stirring  aging  at  room  temperature  prior  to  conventional  hydrothermal <br />treatment was employed in the template-free synthesis of micro- and nano-crystalline sodalites <br />with  two  different  initial  gel  compositions.  The  effect  of  initial  Si/Al  molar  ratio,  NaOH <br />concentration and stirring aging time were investigated on the morphology and particle size of <br />the  synthesised  sodalites.  The  results  revealed  that  applying  various  stirring  aging  time  can <br />change  the  proportion  of  the  contaminant  phase  associated  with  sodalite  and  alter  the <br />morphology of the sodalite crystals from wool ball-like consisting of nano-threads to cabbage-<br />like with  nano-leaves,  as well  as  size  distribution  of  nanocrystalline  sodalite. The  size  of  the <br />nanocrystals was in the range of 50-80 nm as observed by FE-SEM and the yield was as high as <br />about 15%.  https://csm.guilan.ac.ir/article_1259_906b44c34220e9a07c8f676cf10322f9.pdf