Enhanced electromagnetic wave absorption in biochar/yttrium iron garnet hybrid composites for electromagnetic interference shielding applications
简介：Biochar and biochar composites are versatile materials that can be used in many applications.In this study,biochar was pre-pared from sawdust and combined with the yttrium iron garnet(YIG)nanocrystal to investigate the shielding effectiveness of the compos-ite structure.Firstly,the effect of the pyrolysis temperature on the shielding effectiveness of biochar was investigated.Secondly,biochars combined with YIG nanocrystals with different contents and shielding effectiveness of the composites were investigated.The electromag-netic effectiveness of the samples was investigated within the X band(8-12 GHz).The findings indicate that biochar demonstrates en-hanced absorption properties with elevated pyrolysis temperatures.Biochars demonstrated an approximate 40 dB shielding effectiveness,while YIG exhibited approximately 7 dB,corresponding to absorption at 8 GHz.However,the combination of biochar and YIG exhibited exceptional absorption,reaching 67.12 dB at 8 GHz.展开
关键词：biocharElectromagnetic shieldingElectromagnetic wave absorptionComposite
在线出版日期：2026-01-09 （网站首发日期）
