Synthesis and Characterization of Microwave Absorber SiO2 by Sol-Gel Methode

4th International Conference on Advanced Materials Science and Technology

Wardiyati, S.^1 ; Adi, W.A.^1 ; Deswita^1

Center for Science and Technolgy of Advance Materials, National Nuclear Energy Agency, Kawasan Puspiptek Serpong, Tangerang Selatan

15314, Indonesia^1

关键词: Confidential information;    Electromagnetic materials;    Energy dispersive spectrometers;    Microwave absorbers;    Sintering temperatures;    SiO2;    Surface area analyzers;    Synthesis and characterizations;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/202/1/012059/pdf
DOI  :  10.1088/1757-899X/202/1/012059

来源: IOP

【 摘 要 】

In recent years, information technology is growing rapidly, such as communication devices. However, there are still many shortcomings, for example, confidential information leaks caused by the leakage of electromagnetic waves used. A coating of electromagnetic materials or formation composite of electromagnetic material with other materials such as SiO2is needed to overcome these problems. For such needs, it is necessary to study the manufacture of SiO2which is simple, cheap, and effective. In this research, manufacture of SiO2by sol-gel method used a solution of sodium silicate (Na2SiO3) as precursors and H2SO4as a catalyst. The parameters tested in this experiment is the effect of sintering temperature on the properties of the resulting SiO2. The purpose of this study was to obtain an amorphous SiO2powder, which is in nano-sized and has a high surface area. The characterization of prepared samples were performed by using an X-ray Diffraction (XRD), Fourier Transmission Infra Red (FTIR), Scanning electron microscopy-energy dispersive spectrometer (SEM-EDS), Transmission Electron Microscopy (TEM), and Surface Area Analyzer (SAA). Based on the experimental results, the SiO2amorphous structure was obtained with a particle size of 15-20 nm, the surface area of 298 m2/g, and sintering temperature of 100 °C.