Study of the electromagnetic absorber made by natural rubber composites based on Fe₃O₄

This paper proposes the study of an electromagnetic absorber material made from natural rubber latex filled only with Fe<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>O<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</inf>, referred to in this paper as composite foam. The construction method includes chemical mixing, molding, cell morphology analysis, cell size measurement, electromagnetic wave absorption measurement, and dielectric measurement. This study aims to describe the creation of composite foam samples and the distribution of Fe<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>O<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</inf> within them. Moreover, it demonstrates the effect of electromagnetic waves on composite foam filled with Fe<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">3</inf>O<inf xmlns:mml="http://www.w3.org/1998/Math/MathML" xmlns:xlink="http://www.w3.org/1999/xlink">4</inf>. The results of electromagnetic wave and dielectric measurements revealed that frequencies in the range of 800 MHz to 6 GHz are not significantly absorbed.