Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
NiFe-LDH cement-based composite wave-absorbing material and preparation method thereof
The invention belongs to the field of environmental protection, and provides a NiFe-LDH cement-based composite wave-absorbing material and a preparation method thereof. The raw materials comprise: 300-400 parts of cement; 3-4 parts of NiFe-LDH; 3-4 parts of a water reducing agent; and 100-140 parts of mixing water. The preparation method comprises the following steps: firstly, adding the water reducing agent into the mixing water, and stirring for 3 minutes to form a uniform mixing solution; secondly, adding nickel-iron layered double hydroxides (NiFe-LDH) into the mixed solution, placing the mixed solution in an ultrasonic environment for ultrasonic treatment, and obtaining a mixed aqueous solution in which NiFe-LDH is evenly dispersed; then, putting accurately weighed cement into a stirring pot, then adding the stirring solution, stirring the mixture to be uniform, and pouring the prepared slurry into a mold; and finally, maintaining the sample in an air environment, and removing the mold. The prepared NiFe-LDH cement-based composite wave-absorbing material is low in electromagnetic wave reflectivity, the frequency width with the reflectivity lower than -10 dB is wide, and the NiFe-LDH cement-based composite wave-absorbing material is suitable for electromagnetic wave pollution absorption of multiple frequency bands and has remarkable environmental protection and engineering application value.
本发明属于环境保护领域，提供一种NiFe‑LDH水泥基复合吸波材料及其制备方法，其原材料为：水泥300‑400份；NiFe‑LDH 3‑4份；减水剂3‑4份；拌合水100‑140份。制备方法为：首先，将减水剂加入拌合水中，搅拌3min，形成均匀的拌合溶液；其次，将镍铁层状双金属氢氧化物(NiFe‑LDH)加入至拌合溶液中，置于超声环境中超声处理，获得NiFe‑LDH均匀分散的拌合水溶液。然后，将精确称量的水泥至搅拌锅中，再加入拌合溶液搅拌均匀，将制备的浆体浇注于模具中；最后，将试样在空气环境中养护后拆模。本发明制备的NiFe‑LDH水泥基复合吸波材料电磁波反射率较低，反射率低于‑10dB的频率宽度较宽，适用于多个频段的电磁波污染吸收，具有显著的环保及工程应用价值。
NiFe-LDH cement-based composite wave-absorbing material and preparation method thereof
The invention belongs to the field of environmental protection, and provides a NiFe-LDH cement-based composite wave-absorbing material and a preparation method thereof. The raw materials comprise: 300-400 parts of cement; 3-4 parts of NiFe-LDH; 3-4 parts of a water reducing agent; and 100-140 parts of mixing water. The preparation method comprises the following steps: firstly, adding the water reducing agent into the mixing water, and stirring for 3 minutes to form a uniform mixing solution; secondly, adding nickel-iron layered double hydroxides (NiFe-LDH) into the mixed solution, placing the mixed solution in an ultrasonic environment for ultrasonic treatment, and obtaining a mixed aqueous solution in which NiFe-LDH is evenly dispersed; then, putting accurately weighed cement into a stirring pot, then adding the stirring solution, stirring the mixture to be uniform, and pouring the prepared slurry into a mold; and finally, maintaining the sample in an air environment, and removing the mold. The prepared NiFe-LDH cement-based composite wave-absorbing material is low in electromagnetic wave reflectivity, the frequency width with the reflectivity lower than -10 dB is wide, and the NiFe-LDH cement-based composite wave-absorbing material is suitable for electromagnetic wave pollution absorption of multiple frequency bands and has remarkable environmental protection and engineering application value.
本发明属于环境保护领域，提供一种NiFe‑LDH水泥基复合吸波材料及其制备方法，其原材料为：水泥300‑400份；NiFe‑LDH 3‑4份；减水剂3‑4份；拌合水100‑140份。制备方法为：首先，将减水剂加入拌合水中，搅拌3min，形成均匀的拌合溶液；其次，将镍铁层状双金属氢氧化物(NiFe‑LDH)加入至拌合溶液中，置于超声环境中超声处理，获得NiFe‑LDH均匀分散的拌合水溶液。然后，将精确称量的水泥至搅拌锅中，再加入拌合溶液搅拌均匀，将制备的浆体浇注于模具中；最后，将试样在空气环境中养护后拆模。本发明制备的NiFe‑LDH水泥基复合吸波材料电磁波反射率较低，反射率低于‑10dB的频率宽度较宽，适用于多个频段的电磁波污染吸收，具有显著的环保及工程应用价值。
NiFe-LDH cement-based composite wave-absorbing material and preparation method thereof
一种NiFe-LDH水泥基复合吸波材料及其制备方法
WANG BAOMIN (Autor:in) / DENG SHUANG (Autor:in) / AI HONGMEI (Autor:in) / FAN CHENGCHENG (Autor:in)
04.05.2021
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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