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- 2017
空心粉煤灰对铁氧体-炭黑/水泥基复合材料吸波性能的影响
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Abstract:
通过改变空心粉煤灰微珠、铁氧体、炭黑的配比，分析了影响混凝土电磁吸收效能的主要因素，并探讨了空心粉煤灰微珠、铁氧体和炭黑的加入对水泥基复合材料电磁吸收性能的影响机制。结果表明：8~18 GHz频率范围内，空心粉煤灰微珠是影响水泥基复合材料吸波性能的最主要因素，最佳水平组合为20wt%铁氧体、20wt% 粉煤灰、10vol%炭黑，<-10 dB吸收带宽可达10 GHz且明显优于无粉煤灰样品，其机制在于空心粉煤灰微珠的掺入同时改善了材料表面透射性能和介电损耗。 Various content ratios of the hollow fly ash, ferrite and carbon black were used to analyze the main factors and the influencing mechanisms on absorbing properties of cement based composites. The results indicate that hollow fly ash is the main factor on absorbing property. The best absorbing bandwidth of less than -10 dB was achieved by the specimen comprised of 20wt% ferrite, 20wt% hollow fly ash and 10vol% carbon black as exhibiting 10 GHz, which is obviously better than none hollow fly ash samples. Improving material surface transmission performance and dielectric loss are the main effect mechanisms of fly ash. 四川省教育厅科研项目（16ZB0316）；绵阳师范学院科研项目（2011A04）
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