Reaction pathway led by silicate structure transformation on decomposition of CaSiO 3 in alkali fusion process using NaOH
作者: Chang-ming ZHAOGuo-cheng WANGSheng-li LIXin-gang AIZi-rui WANGYu-chun ZHAI
作者单位: 1School of Materials and Metallurgy, University of Science and Technology Liaoning, Anshan 114051, China
2Key Laboratory of Chemical Metallurgy Engineering of Liaoning Province, Anshan 114051, China
3School of Materials and Metallurgy, Northeastern University, Shenyang 110004, China
刊名: Transactions of Nonferrous Metals Society of China, 2015, Vol.25 (11), pp.3827-3833
来源数据库: Elsevier Journal
DOI: 10.1016/S1003-6326(15)64027-4
关键词: alkali fusion processCaSiO 3intermediatereaction pathway
原始语种摘要: Abstract(#br)The mechanism of decomposition of calcium inosilicate (CaSiO 3 ) synthesized through chemical deposition method using analytical reagent NaSiO 3 ?9H 2 O and CaCl 2 during the alkali fusion process using NaOH was investigated by Raman spectroscopy in situ, X-ray diffraction and Fourier transform infrared spectrometer (FTIR). The results show that the tetrahedral silica chains within CaSiO 3 are gradually disrupted and transformed into nesosilicate with the isolated SiO 4 tetrahedra at the beginning of the alkali fusion process. The three intermediates including Ca 2 SiO 4 , Na 2 CaSiO 4 and Na 2 SiO 3 appear simultaneously in the decomposition of CaSiO 3 , while the final products are Ca(OH) 2 and Na 4 SiO 4 . It can be concluded that there exist two reaction pathways in the...
全文获取路径: Elsevier  (合作)

  • silicate 硅酸盐
  • fusion 融解
  • structure 构造
  • alkali 
  • process 过程
  • decomposition 分解
  • diffraction 衍射
  • pathway 轨道
  • reaction 反酌
  • deposition 沉积