Abstract SnO2@MWCNT wave absorbent was firstly fabricated via a hydrothermal process followed by heat treatment. Then SnO2@MWCNT/silicone rubber wave-absorbing composites were obtained by solution casting method. XRD, Raman, TGA, XPS, and TEM analyses indicated the successful preparation of covalently bonded SnO2@MWCNT absorbent with encapsulation structure. When the mass fraction of SnO2@MWCNT was 7.5 wt% and the sample thickness was 2.6 mm, the SnO2@MWCNT/silicone rubber wave-absorbing composite displayed the minimum reflection loss (RLmin) of −56.9 dB and effective absorption bandwidth (EAB) of 3.1 GHz. The outstanding wave-absorbing performances of SnO2@MWCNT/silicone rubber wave-absorbing composites could be ascribed to the excellent impedance matching and dielectric loss capability. Furthermore, the corresponding 7.5 wt% SnO2@MWCNT/silicone rubber wave-absorbing composite exhibited heat resistance index (THRI) of 196.3 °C, higher than that of neat silicone rubber (187.4 °C).

中文翻译：

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通过引入具有封装结构的共价键合 SnO2@MWCNT 吸收剂，硅橡胶复合材料具有优异的吸波性能

摘要 SnO2@MWCNT 波吸收剂首先通过水热工艺制备，然后进行热处理。然后采用溶液浇铸法制备了SnO2@MWCNT/硅橡胶吸波复合材料。XRD、Raman、TGA、XPS 和 TEM 分析表明共价键合的 SnO2@MWCNT 吸收剂的制备成功。当SnO2@MWCNT的质量分数为7.5 wt%，样品厚度为2.6 mm时，SnO2@MWCNT/硅橡胶吸波复合材料的最小反射损耗（RLmin）为-56.9 dB，有效吸收带宽（EAB） 3.1 GHz。SnO2@MWCNT/硅橡胶吸波复合材料优异的吸波性能可归因于其优异的阻抗匹配和介电损耗能力。此外，相应的 7.