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Nano ceramic/reduced graphene oxide composite aerogel wave-absorbing material and preparation method thereof
The invention discloses a nano ceramic/reduced graphene oxide composite aerogel wave-absorbing material and a preparation method thereof. The wave-absorbing material is mainly prepared from barium titanate nanoparticles, a graphene oxide aqueous solution and a reducing agent. The preparation method comprises the following steps: firstly, preparing a nano-scale barium titanate dielectric ceramic material by a hydrothermal method, and then synthesizing the nano barium titanate/reduced graphene oxide composite aerogel wave-absorbing material by combining a chemical reduction method with a freeze-drying process. By introducing barium titanate nanoparticles, not only is the impedance matching performance improved, but also the generation of interface polarization can be caused by polarization charges accumulated at the interface of barium titanate and reduced graphene oxide, and the enhanced polarization related to dielectric relaxation is beneficial to improving the wave absorbing performance of the material.
一种纳米陶瓷/还原氧化石墨烯复合气凝胶吸波材料及其制备方法，该吸波材料的制备原料主要包括钛酸钡纳米颗粒、氧化石墨烯水溶液和还原剂。制备方法是首先通过水热法制备了纳米级的钛酸钡介电陶瓷材料，随后通过化学还原法结合冷冻干燥工艺合成了纳米钛酸钡/还原氧化石墨烯复合气凝胶吸波材料；通过引入钛酸钡纳米颗粒，不仅改善了阻抗匹配性能，而且在钛酸钡和还原氧化石墨烯界面处积累的极化电荷会导致界面极化的产生，这些增强的与介电弛豫有关的极化有利于改善材料的吸波性能。
Nano ceramic/reduced graphene oxide composite aerogel wave-absorbing material and preparation method thereof
The invention discloses a nano ceramic/reduced graphene oxide composite aerogel wave-absorbing material and a preparation method thereof. The wave-absorbing material is mainly prepared from barium titanate nanoparticles, a graphene oxide aqueous solution and a reducing agent. The preparation method comprises the following steps: firstly, preparing a nano-scale barium titanate dielectric ceramic material by a hydrothermal method, and then synthesizing the nano barium titanate/reduced graphene oxide composite aerogel wave-absorbing material by combining a chemical reduction method with a freeze-drying process. By introducing barium titanate nanoparticles, not only is the impedance matching performance improved, but also the generation of interface polarization can be caused by polarization charges accumulated at the interface of barium titanate and reduced graphene oxide, and the enhanced polarization related to dielectric relaxation is beneficial to improving the wave absorbing performance of the material.
一种纳米陶瓷/还原氧化石墨烯复合气凝胶吸波材料及其制备方法，该吸波材料的制备原料主要包括钛酸钡纳米颗粒、氧化石墨烯水溶液和还原剂。制备方法是首先通过水热法制备了纳米级的钛酸钡介电陶瓷材料，随后通过化学还原法结合冷冻干燥工艺合成了纳米钛酸钡/还原氧化石墨烯复合气凝胶吸波材料；通过引入钛酸钡纳米颗粒，不仅改善了阻抗匹配性能，而且在钛酸钡和还原氧化石墨烯界面处积累的极化电荷会导致界面极化的产生，这些增强的与介电弛豫有关的极化有利于改善材料的吸波性能。
Nano ceramic/reduced graphene oxide composite aerogel wave-absorbing material and preparation method thereof
一种纳米陶瓷/还原氧化石墨烯复合气凝胶吸波材料及其制备方法
ZHENG XIAOTIAN (Autor:in) / ZHAO HANG (Autor:in) / MOU YIRUI (Autor:in) / FENG ZIBO (Autor:in) / LIU ZHAOPING (Autor:in)
14.06.2024
Patent
Elektronische Ressource
Chinesisch
IPC:
C04B
Kalk
,
LIME
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