کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1636026 | 1516951 | 2015 | 7 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Reaction pathway led by silicate structure transformation on decomposition of CaSiO3 in alkali fusion process using NaOH
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موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
The mechanism of decomposition of calcium inosilicate (CaSiO3) synthesized through chemical deposition method using analytical reagent NaSiO3?9H2O and CaCl2 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 CaSiO3 are gradually disrupted and transformed into nesosilicate with the isolated SiO4 tetrahedra at the beginning of the alkali fusion process. The three intermediates including Ca2SiO4, Na2CaSiO4 and Na2SiO3 appear simultaneously in the decomposition of CaSiO3, while the final products are Ca(OH)2 and Na4SiO4. It can be concluded that there exist two reaction pathways in the alkali fusion process of CaSiO3: one is ion exchange, the other is in the main form of the framework structure change of silicate. The reaction pathway is led by silicate structure transformation in the alkali fusion process.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 11, November 2015, Pages 3827-3833
Journal: Transactions of Nonferrous Metals Society of China - Volume 25, Issue 11, November 2015, Pages 3827-3833
نویسندگان
Chang-ming ZHAO, Guo-cheng WANG, Sheng-li LI, Xin-gang AI, Zi-rui WANG, Yu-chun ZHAI,