CAJ | 학술논문

以NaSiO 3·9H 2 O和CaCl 2为原料，通过化学沉积法合成链状硅酸盐(CaSiO 3)。采用拉曼光谱、X射线衍射和红外光谱研究其在NaOH碱熔过程中的分解机制。结果表明，CaSiO 3在碱熔过程中链状结构的硅氧四面体结构逐渐断裂、转变生成岛状结构的硅氧四面体。CaSiO3分解过程中同时生成3种中间体：Ca2SiO4, Na2CaSiO4和Na2SiO3，最终产物是Ca(OH)2和 Na4SiO4。因此，CaSiO3在NaOH碱熔融反应过程中存在两条反应途径，分别以离子交换和硅酸盐骨架结构改变为主要形式，碱熔过程中硅酸盐结构的变化贯穿于整个反应过程。
이NaSiO 3·9H 2 O화CaCl 2위원료，통과화학침적법합성련상규산염(CaSiO 3)。채용랍만광보、X사선연사화홍외광보연구기재NaOH감용과정중적분해궤제。결과표명，CaSiO 3재감용과정중련상결구적규양사면체결구축점단렬、전변생성도상결구적규양사면체。CaSiO3분해과정중동시생성3충중간체：Ca2SiO4, Na2CaSiO4화Na2SiO3，최종산물시Ca(OH)2화 Na4SiO4。인차，CaSiO3재NaOH감용융반응과정중존재량조반응도경，분별이리자교환화규산염골가결구개변위주요형식，감용과정중규산염결구적변화관천우정개반응과정。
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.