Open Access
Review
Table 3
Representative summary of iron-based filler.
| No. | Base Material | Additive type | Loading wt.%, thickness | RL min. | References |
|---|---|---|---|---|---|
| 1 | Polyurethane | Natural zeolites and ferric-oxide | Nano zeolite: ferric oxide 18:2––––– 16:4––––– 14:6––––– 12:8––––– 10:10––––– |
–7.3 dB@9.9 GHz –12.2 dB@9.9 GHz –9 dB@11.1 GHz –13.2 dB.@11.1 GHz –2 dB@11.1 GHz |
[63] |
| 2 | SnO2/MWCNTs composites | Iron | 16.2%, ––– 29.2%, ––– 39.8%, ––– 48.8%,–––– |
–13 dB@8.5 GHz with 2 mm thickness –12.5 dB@12 GHz with 1.5 mm –22.5 dB@13.7GB with 1.5 mm –44.5 dB@15.44 GHz with 1.5 mm |
[73] |
| 3 | (MWCNT) composites | Fe. | 5% 10% 20% |
–14 dB@6 GHzwith3 mm thickness and −14 dB@6 GHz with 2 mm –28 dB@18 GHz with 1 mm –24 dB@50 GHz with 0.4 mm and −22 dB@25 GHz with 0.8 mm |
[64] |
| 4 | Paraffin wax | Fe@CF | 20% 30% 40% |
–22.5 dB,@9 GHz with 3 mm thickness –36.89 dB@6.2 GHZ with 2.5 mm –17.24 dB@7.8 GHZ with 2.5 mm |
[65] |
| 5 | Fe3O4–PANI nanoparticle–paraffin composite | Fe3O4 nanoparticles | 1 mm 1.5 mm 1.7 mm 2 mm 2.5 mm 3 mm 3.5 mm 4 mm 4.5 mm 5 mm |
–5 dB@@16.5 GHz –16 dB@18 GHz –35.1 dB@16.7 GHz. –15 dB@16.5 GHz –15 dB@9 GHz –15.5 dB@6.5 GHz –15 dB@5 GHz –15.5 dB@4.2 GHz –15 dB@3.9 GHz –15 dB@3 GHz |
[70] |
| 6 | Carbonyl iron particles (GOCIPs) composites | graphene oxide (GO) | 0% 0.5% 1% 2% |
–16 dB@18 GHz with 1.5 mm thickness –25 dB@18 GHz with 1.5 mm –39 dB@18 GHz with 1.5 mm –56 dB@10.9 GHz with 1.9 mm |
[67] |
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