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Preparation method of nano-lanthanum strontium manganese oxide/graphene composite wave absorbing coating

A graphene composite, lanthanum strontium manganese oxide technology, applied in coatings, epoxy resin coatings, radiation-absorbing coatings, etc., can solve problems such as thick metal graphene composite coatings, and achieve wave-absorbing frequency bandwidth and system structure Simple, fast processing results

Active Publication Date: 2015-07-22
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0010] Lanthanum strontium manganese oxide powder has a good magnetic loss effect as a wave-absorbing material, and graphene has a good dielectric loss effect as a wave-absorbing material. Thicker metal-graphene composite coating

Method used

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  • Preparation method of nano-lanthanum strontium manganese oxide/graphene composite wave absorbing coating

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example 1

[0029] Example 1: Preparation of metal-based nano-lanthanum strontium manganese oxide / graphene composite absorbing coating by spin coating method

[0030] (1) Use lanthanum nitrate, strontium nitrate, and manganese nitrate in molar ratios of 0.7:0.3:1, respectively, add citric acid, and use sol-gel self-combustion method to prepare lanthanum strontium manganese oxide nanopowder with a particle size of 1-100nm. Add graphene, epoxy resin dissolved in absolute ethanol and curing agent to prepare slurry.

[0031](2) The substrate is made of an aluminum plate, which is ultrasonically cleaned, dried, and then fixed on a spin coater;

[0032] (3) Drop the prepared slurry onto the substrate, start it at a low speed, and spread the spin coating solution evenly into a thin film. Place it at room temperature to dry it naturally, then put it in a vacuum drying oven to dry for 10 hours, and then coat the film again. Finally, put it into a vacuum drying oven to dry. Put the coated film int...

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Abstract

Belonging to the field of nano-functional device preparation, the invention specifically relates to a preparation method of a nano-lanthanum strontium manganese oxide / graphene composite wave absorbing coating. The method includes: preparing nano-lanthanum strontium manganese oxide powder by sol-gel auto-combustion technique, preparing lanthanum strontium manganese oxide / graphene composite powder by agglomeration technique, adding epoxy resin and a curing agent and mixing the materials into a slurry, taking high temperature alloy or other materials as the substrate, preparing a compact, uniform and thick nano-lanthanum strontium manganese oxide / graphene composite coating by spin coating technique, and then studying the wave absorbing performance. The method provided by the invention has the advantages of simple system structure, fast processing speed, strong regulation ability and wide wave absorbing band width, etc., is suitable for preparation of large area wave absorbing coating materials, and has significant commercial value and practical significance.

Description

technical field [0001] The invention belongs to the field of preparation of nanometer functional devices, and in particular relates to a preparation method of nanometer lanthanum strontium manganese oxide / graphene composite wave-absorbing coating. Background technique [0002] Graphene is a new material with a single-layer sheet structure composed of carbon atoms. Graphene is the thinnest and hardest nano-material known in the world. Its thermal conductivity is as high as 5300W / m·K, its electron mobility exceeds 15000cm2 / V·s at room temperature, and its resistivity is only about 10-6Ω·cm. Therefore, In nanogenerators ([1] ROH I J; SHIN P K, KR2013141901-A), electromechanical sensors ([2] HURSTA, KURTZAD, US2010140723-A1; US8044472-B2), light-emitting diodes ([3] Tchernycheva, M; Lavenus , P; Zhang, H; Babichev, A V; Jacopin, G; Shahmohammadi, M; Julien, F H; Ciechonski, R; Vescovi, G; ([4] Chaoxing Wu; Fushan Li; Yongai Zhang; Tailiang Guo, Applied Surface Science, 10.1016...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B32B15/092C09D163/00C09D5/32B05D7/24B05D7/14
Inventor 张跃丁一廖庆亮闫小琴余寅生章潇慧康卓张光杰
Owner UNIV OF SCI & TECH BEIJING
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