Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Eine Plattform für die Wissenschaft: Bauingenieurwesen, Architektur und Urbanistik
Heat-resistant wave-absorbing material and preparation method thereof
The invention discloses a heat-resistant wave-absorbing material, which is a composite material with quartz as matrix and a quartz fiber needled part as a reinforced phase. The composite material contains a short carbon fiber; the length of the short carbon fiber is 5-6mm; the volume content of the short carbon fiber in the composite material is 0.002-0.005g/cm<3>; the volume density of the quartz fiber needled part is 0.43-0.45g/cm<3>; and the preparation method disclosed by the invention comprises the following steps: selecting raw materials; preparing a fiber preformed part; dipping the fiber preformed part for a plurality of times; and carrying out gel and heat treatment until densification is finished. When the heat-resistant wave-absorbing material disclosed by the invention is 3.5mm in thickness, the reflectivity within a frequency range of 8-18GHz can be lower than -8dB; the heat-resistant wave-absorbing material has relatively good wave-absorbing property when the thickness is relatively small; and the preparation method disclosed by the invention is simple in processing step, free of a harmful and toxic pollutant in the technological process, and good in compatibility with the environment.
Heat-resistant wave-absorbing material and preparation method thereof
The invention discloses a heat-resistant wave-absorbing material, which is a composite material with quartz as matrix and a quartz fiber needled part as a reinforced phase. The composite material contains a short carbon fiber; the length of the short carbon fiber is 5-6mm; the volume content of the short carbon fiber in the composite material is 0.002-0.005g/cm<3>; the volume density of the quartz fiber needled part is 0.43-0.45g/cm<3>; and the preparation method disclosed by the invention comprises the following steps: selecting raw materials; preparing a fiber preformed part; dipping the fiber preformed part for a plurality of times; and carrying out gel and heat treatment until densification is finished. When the heat-resistant wave-absorbing material disclosed by the invention is 3.5mm in thickness, the reflectivity within a frequency range of 8-18GHz can be lower than -8dB; the heat-resistant wave-absorbing material has relatively good wave-absorbing property when the thickness is relatively small; and the preparation method disclosed by the invention is simple in processing step, free of a harmful and toxic pollutant in the technological process, and good in compatibility with the environment.
Heat-resistant wave-absorbing material and preparation method thereof
LIU HAITAO (Autor:in) / CHENG HAIFENG (Autor:in) / ZHOU YONGJIANG (Autor:in) / ZU MEI (Autor:in)
02.09.2015
Patent
Elektronische Ressource
Englisch
IPC:
C04B
Kalk
,
LIME
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