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发明公开
CN108586763A 一种Ku波段宽频电磁波吸收剂及其制备方法 有权

一种Ku波段宽频电磁波吸收剂及其制备方法
摘要：
本发明公开了一种Ku波段宽频电磁波吸收剂及其制备方法，包括如下步骤：以硝酸钴和二甲基咪唑为原料制备沸石咪唑酯骨架ZIF-67预聚体，接着将ZIF-67预聚体于管式炉中进行退火处理，得到预处理的ZIF-67；将聚(二甲基亚甲硅烷基)二乙炔PDSDA和预处理的ZIF-67在有机溶剂反应得到PDSDA配位预处理ZIF-67产物；最后，将PDSDA配位预处理ZIF-67产物进行退火处理得到PDSDA配位ZIF-67电磁吸收剂。本发明所制备的电磁波吸收剂其涂层厚度仅为1.9mm，远小于同类产品，很好地解决了电磁波吸收剂在电磁波衰减过程中存在厚度大的问题，有效吸收频率宽度为5.72GHz，同时实现了电磁波吸收剂在Ku波段(12GHz-18GHz)反射系数均低于-10dB(90％电磁波被吸收)。
摘要（英）：

The invention discloses a Ku wave band broadband electromagnetic wave absorbent and a preparation method thereof. The preparation method comprises the following steps that a zeolite imidazolate framework ZIF-67 prepolymer is prepared by using cobalt nitrate and dimethylimidazole as raw materials; then, the ZIF-67 prepolymer is subjected to annealing treatment in a tubular furnace to obtain pretreated ZIF-67; PDSDA and the pretreated ZIF-67 react in an organic solvent to obtain a PDSDA coordination pretreated ZIF-67 product; finally, the PDSDA coordination pretreated ZIF-67 product is subjectedto annealing treatment to obtain a PDSDA coordination ZIF-67 electromagnetic absorbent. The prepared electromagnetic wave absorbent has the advantages that the coating thickness is only 1.9 mm and ismuch smaller than that of similar products; the problem of great thickness of the electromagnetic wave absorbent in the electromagnetic wave attenuation process is well solved; the effective absorption frequency width is 5.72GHz; meanwhile, the effect that the reflection coefficient of the electromagnetic wave absorbent in the Ku wave band (12GHz to 18GHz) is lower than -10dB (90 percent of electromagnetic waves are absorbed).

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