创新具有宽有效吸收带宽、高电导率和易加工性的优良微波吸收剂已成为一项艰巨的任务，阻碍了其未来的应用。因此，首次为此目的设计了三种基于不同尺寸的 Bi 2 Te 3微波吸收剂（标记为 BT1 ~30.7 µm、BT2 ~43.1 ± 3 nm 和 BT3 ~20.1 ± 3 nm）。BT3 吸收剂的表面积 (70.9 m 2 /g) 大于 BT2 (41.39 m 2 /g) 和 BT1 (2.34 m 2 /g)。Bi 2 Te 3基吸收体的尺寸对微波吸收特性有很大影响。Bi 2 Te的较小尺寸/直径3显示出更高的 EM 吸收，而厚度为 1.51 mm 的 BT3 (20.1 ± 3 nm) 吸收器在f = 15.47 GHz 时表现出最小反射损耗 (RL= ─ 60 dB)，而 BT2 (43.1 ± 3 nm) 表现出（RL = ─ 34.9 dB at 6.59 GHz for 4.1 mm）和（RL = ─25 dB at 7 GHz for 4.1 mm）BT1 (30.7 µm)。此外，BT3 吸收器显示出从 10 GHz 到 18 GHz 的有效吸收带宽（2.1 毫米处的 8 GHz）比 BT2 的其他两个屏蔽（2.1 毫米处的 7.01 GHz）和 BT1 的（2.6 毫米处的 6.01 GHz）更好. 介电损耗是参与强电磁吸收模式的主要因素。较小尺寸的 Bi 2 Te 3 (BT3) 吸收器记录了最高的热导率k = 1.41 W/mK，证明这些吸收器具有更大的热能储存。最后，这些基于Bi 2 Te 3颗粒的电磁吸收剂由于其重量轻、尺寸小和智能的特点，可能在电子、电气和军事设备的宽频带宽中作为一种高效的电磁吸收材料具有潜在的应用。
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Bismuth telluride (Bi2Te3) nanoparticles as a brilliant microwave absorber: A new exploration
Innovation of an excellent microwave absorber with a wide effective absorption bandwidth, high conductivity, and easy processability has become a hard dare, which obstructs its prospective applications. Thus, three microwave absorbers of Bi2Te3 based on different size (labelled BT1 ~30.7 µm, BT2 ~43.1 ± 3 nm and BT3 ~20.1 ± 3 nm) have been designed for this purpose, for the first time. BT3 absorbers have shown a surface area (70.9 m2/g) larger than BT2 (41.39 m2/g) and BT1 (2.34 m2/g). The size of the Bi2Te3 based absorbers has shown a great impact on the microwave absorbing features. The smaller size/diameter of Bi2Te3 has displayed a higher EM absorption, whereas the BT3 (20.1 ± 3 nm) absorber with thickness 1.51 mm exhibits a minimum reflection loss (RL= ─ 60 dB) at f = 15.47 GHz while the BT2 (43.1 ± 3 nm) exhibits a (RL = ─ 34.9 dB at 6.59 GHz for 4.1 mm) and (RL= ─25 dB at 7 GHz for 4.1 mm) for BT1 (30.7 µm). Also, the BT3 absorber shows an effective absorption bandwidth (8 GHz at 2.1 mm) extending from 10 to 18 GHz better than the other two shields (7.01 GHz at 2.1 mm) for the BT2 and (6.01 GHz at 2.6 mm) for the BT1. The dielectric loss is the prevailing factor participates in the strong EM absorption mode. The smaller size Bi2Te3 (BT3) absorber has recorded the highest thermal conductivity k = 1.41 W/mK, proving the larger thermal energy storages of these absorber. Finally, these Bi2Te3 particles based EM absorbers may have potential applications as an efficient EM absorption material in broad bandwidth of frequency in electronic, electrical and military devices thanks to their lightweight, small size and smart features.