Characterization of porous glass-ceramic material as absorber of electromagnetic radiation

International Scientific Conference on "Radiation-Thermal Effects and Processes in Inorganic Materials"

材料科学;物理学

Kazmina, O.^1 ; Suslyaev, V.^2 ; Dushkina, M.^1 ; Semukhin, B.^3

National Research Tomsk Polytechnic University, Tomsk, Russia^1

National Research Tomsk State University, Tomsk, Russia^2

Institute of Strength Physics and Materials Science, Siberian Branch, Russian Academy of Sciences, Tomsk, Russia^3

关键词: Biological objects;    Complex dielectric permittivities;    Microwave interactions;    Physic-mechanical properties;    Porous glass-ceramic;    Protective screens;    Transmission and absorption;    Two-stage methods;   

Others  :  https://iopscience.iop.org/article/10.1088/1757-899X/81/1/012036/pdf
DOI  :  10.1088/1757-899X/81/1/012036

学科分类：材料科学（综合）

来源: IOP

【 摘 要 】

Investigations of a foam glass-ceramic material synthesized from raw siliceous earth material by the two-stage method at temperatures below 950°C have demonstrated the improvement of its physic mechanical properties in comparison with foam glass synthesized from glass cullet. This material actively interacts with microwaves and can be used for the development of protective screens reducing the adverse effect of microwaves on biological objects, anechoic chambers, and rooms with low level of electromagnetic background noise. Spectra of the transmission and absorption coefficients and of the complex dielectric permittivity for frequencies in the range 26-260 GHz are presented. The observed effects demonstrate the existence of regions with partial and total reflection arising on the glass-pore boundary and of the microwave interaction with ultradisperse carbon particles that remain after foaming with incomplete frothier transition from the soot to the gas phase.