Synthesis, characterization and evaluation of reflectivity of nanosized CaTiO3/epoxy resin composites in microwave bands

Bulletin of materials science

M Murugan³  V K Kokate²  M S Bapat¹ 

[1] Department of Allied Sciences, Cummins College of Engineering, Pune 411 052, India$$Department of Allied Sciences, Cummins College of Engineering, Pune 411 052, IndiaDepartment of Allied Sciences, Cummins College of Engineering, Pune 411 052, India$$;Department of E&TC Engineering, College of Engineering, Pune 411 048, India$$Department of E&TC Engineering, College of Engineering, Pune 411 048, IndiaDepartment of E&TC Engineering, College of Engineering, Pune 411 048, India$$;Department of E&TC Engineering, Vishwakarma Institute of Information Technology, Pune 411 048, India$$Department of E&TC Engineering, Vishwakarma Institute of Information Technology, Pune 411 048, IndiaDepartment of E&TC Engineering, Vishwakarma Institute of Information Technology, Pune 411 048, India$$

关键词: Anechoic chamber;    calcium titanate;    electromagnetic interference;    epoxy resin composites;    microwave/radio frequency absorber.;   

DOI  :  

学科分类：材料工程

来源: Indian Academy of Sciences

【 摘 要 】

Microwave absorbing materials play a major role in electromagnetic interference and compatibility measurements in anechoic chambers. Nanocrystalline calcium titanate (CT) was synthesized by hydrothermal method and further composites of CT/epoxy resin were fabricated as thin solid slabs of four different weight ratios. The composite material was analyzed by X-ray diffraction (XRD) and transmission electron microscopy (TEM), which reveals that CT was observed to be in the monoclinic phase with an average crystallite size of 24 nm. The reflectivity measurement of the composite materials was carried out by the transmission/reflection method using a vector network analyzer R&S: ZVA40, in the X- and Ku-bands. The effective permittivity and permeability of the samples was also computed with the help of measured transmission and reflection coefficients. The results show that CT with equal weight of epoxy resin provides �??30 dB at 8.5 GHz in the X-band and �??19.5 dB at 18.0 GHz in the Ku-band. Reflectivity was found to be better than �??10 dB for 2.2 GHz and 1.9 GHz for X-band and Ku-band, respectively and encourages use of it as potential microwave absorber material.

【 授权许可】

Unknown