Influence of Magnetic Wood on Mechanical and Electromagnetic Wave-Absorbing Properties of Polymer Composites

Table 3

The reflection losses compared with the literature.

Ref.	Filler material and method	Reflection losses and frequency	Present work
4	Oak wood and co-precipitation chemical interactions	−64.26 dB at 14.36 GHz	By co-precipitation chemical interactions for magnetic wood synthesis process and by hand lay-up method, the best results of RL are obtained at 10.2 GHz of −9.40 dB.
11	Wood and (1) coating type (Ni–Zn ferrite powder coated onto a fibre board), (2) powder type (Ni–Zn ferrite powder and cider wood powder mixed and pressed into boards), (3) impregnated type (cider wood impregnated with a water-based magnetic fluid), (4) sandwich type (combination structure consisting of a fibre board layer/magnetic binder layer/fibre board layer).	At 1.93 GHz, the RL as −16.69 dB, −13.83 dB, −3.64 dB.
13	Coating-type magnetic wood	−14.56 dB at 10.0 GHz
14	Oak wood and co-precipitation chemical interactions	−14.14 dB at 7 GHz
20	Powder-type magnetic wood	−20 dB over the 2.5–6.2 GHz