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Preparation method and application of ferroferric oxide nano composite material with mesoscopic ordered arrangement and carbon coating

A nano-composite material, the technology of ferric oxide, is applied in the preparation/purification of carbon, the oxide of ferrous iron, iron oxide/iron hydroxide, etc., which can solve the problem of narrow absorption frequency band, high-frequency absorption range, absorption Problems such as weak strength

Active Publication Date: 2021-08-20
HARBIN INST OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0004] The present invention solves the technical problems of weak absorption strength, narrow absorption frequency band and high-frequency absorption range of traditional ferrite materials, and provides a mesoscopically ordered and carbon-coated Fe3O4 nanocomposite material. Preparation method and application

Method used

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  • Preparation method and application of ferroferric oxide nano composite material with mesoscopic ordered arrangement and carbon coating
  • Preparation method and application of ferroferric oxide nano composite material with mesoscopic ordered arrangement and carbon coating
  • Preparation method and application of ferroferric oxide nano composite material with mesoscopic ordered arrangement and carbon coating

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specific Embodiment approach 1

[0040] Specific embodiment 1: In this embodiment, a method for preparing a mesoscopically ordered and carbon-coated ferric oxide nanocomposite material is specifically carried out according to the following steps:

[0041] One, prepare ferric oleate:

[0042] ①. Mix sodium oleate and ferric chloride, add to the mixed solvent, fully disperse and mix to obtain mixed solution A;

[0043] ②. Heat the mixed liquid A obtained in step ① to boiling, then lower the temperature to 60-70° C., and keep it warm for 1-5 hours to obtain a black oily liquid;

[0044] ③. Mix deionized water with the black oily liquid obtained in step ②, then extract 3 to 10 times, remove the solvent, and obtain iron oleate;

[0045] 2. Prepare the precursor of oleic acid-coated ferric oxide:

[0046] ①. Mix the solvent, surfactant and ferric oleate obtained in step 1, stir and heat to 300-400°C, control the heating rate to 3-10°C / min, and the heating time to 1-5h, then keep warm for 30min-2h , to obtain the...

specific Embodiment approach 2

[0050] Embodiment 2: The difference between this embodiment and Embodiment 1 is that in step 1, the molar ratio of sodium oleate to ferric chloride is (2.5-5):1. Others are the same as in the first embodiment.

specific Embodiment approach 3

[0051] Embodiment 3: The difference between this embodiment and Embodiment 1 or 2 is that in step 1, the mixed solvent is mixed with n-hexane, absolute ethanol and deionized water. Others are the same as in the first or second embodiment.

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Abstract

The invention discloses a preparation method and application of a ferroferric oxide nano composite material with ordered mesoscopic arrangement and carbon coating, and relates to the field of preparation and application of electromagnetic wave absorbing materials. The technical problems that a traditional ferrite material is low in absorption strength and narrow in absorption frequency band, and the absorption range is in a high frequency band are solved. The preparation method comprises the steps of 1, preparing ferric oleate; 2, preparing a precursor of oleic acid coated ferroferric oxide; and 3, preparing the ferroferric oxide nano composite material which is in mesoscopic ordered arrangement and is coated with carbon. According to the invention, low-broadband absorption of the compound to S, C and X wave bands is realized through a mesoscopic ordered structural design of the ferroferric oxide nanoparticles connected by the carbon layer. The ferroferric oxide nano composite material with ordered mesoscopic arrangement and coated with carbon is used as an electromagnetic wave absorbing material for absorbing microwaves in S, C and X wave bands.

Description

technical field [0001] The invention relates to the field of preparation and application of electromagnetic wave absorbing materials. Background technique [0002] Today, the way electromagnetic waves transmit information has greatly improved the efficiency of human transmission of information. However, when humans use electromagnetic waves to transmit information and develop electromagnetic communication technology, the electromagnetic pollution brought by electromagnetic waves has a rather adverse impact on human society. In addition to social and civilian production and life, in the field of national defense and military, radar stealth technology also requires excellent absorbing materials. Generally speaking, the commonly used frequency bands for radar positioning and tracking are 2-18 GHz, including S-band (2-4 GHz), C-band (4-8 GHz), X-band (8-12 GHz) and Ku-band (12-18 GHz). Modern times put forward four key requirements for absorbing materials - thin, light, wide a...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08C01B32/05B82Y40/00B82Y30/00H01Q17/00H05K9/00
CPCC01G49/08C01B32/05B82Y40/00B82Y30/00H01Q17/004H05K9/0083C01P2004/80C01P2006/90Y02E60/10
Inventor 黄小萧何云飞闫旭钟博刘冬冬刘玉浩
Owner HARBIN INST OF TECH
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