Influence of Hydrothermal Treatment on Crystalline Form of SiO2 Synthesized by Sol-Gel Method

International Conference on Mechanical Engineering, Automation and Control Systems 2017

机械制造;无线电电子学;计算机科学

Pavlenko, V.I.^1 ; Cherkashina, N.I.^1 ; Demkina, L.N.^1

Belgorod State Technological University Named after V.G. Shoukhov, 46, Kostyukov St., Belgorod

308012, Russia^1

关键词: Ammonium chloride;    Crystalline form;    Fourier transform infrared spectra;    Hydrothermal methods;    Hydrothermal treatments;    Morphology and structures;    Scanning electron micrographs;    Tetra-ethyl-ortho-silicate;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/327/5/052026/pdf
DOI  :  10.1088/1757-899X/327/5/052026

学科分类：计算机科学（综合）

来源: IOP

【 摘 要 】

The hydrothermal method and traditional sol-gel process for the synthesis of SiO2particles were comparatively studied. For the synthesis of SiO2, tetraethyl orthosilicate (tetraethoxysilane or TEOS) and ammonium chloride (NH4OH) (as a catalyst) were used. SiO2was prepared by the TEOS hydrolysis reaction at room temperature and hydrothermal treatment. Morphology and structure of the final products were characterized by X-ray diffraction (XRD), Fourier transform infrared spectrum (FT-IR) and scanning electron micrograph (SEM). It was found that SiO2product synthesized by the TEOS hydrolysis reaction at room temperature has an amorphous phase. XRD analysis shows the presence of an amorphous halo-A strong peak at Bragg angle 21 °-22 °. The hydrothermal treatment leads to crystallization of the material.