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Preparation method of manganous-manganic oxide magnetic wave-absorbing filler

A technology of manganese tetroxide and magnetic wave absorption, which is applied in the fields of manganese oxide/hydroxide, nano-magnetism, and bulk chemical production, etc.

Pending Publication Date: 2020-12-04
NANCHANG HANGKONG UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The applicant found that so far, there is no patent on the preparation of magnetic manganese oxide materials by supercritical fluid treatment process, especially the nanosheet manganese oxide materials with molecular size thickness, which have not been applied for invention patents

Method used

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  • Preparation method of manganous-manganic oxide magnetic wave-absorbing filler
  • Preparation method of manganous-manganic oxide magnetic wave-absorbing filler

Examples

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Effect test

Embodiment 1

[0036] Take 20mg of pre-prepared H 0.13 MnO 2 0.7H 2 The O nanosheet material was added to a stainless steel reactor, injected with 10ml of DMF solvent, and dispersed ultrasonically for 10 minutes at low power; then the sealed reaction vessel was heated to 673.15K (400°C) in a professionally designed tube furnace, Leave on for 15 minutes. The pressure of the reactor is adjusted by pre-designing the volume of the reaction vessel, the amount of reactants and the temperature. The reaction was finally terminated by rapidly exiting the hot reactor chamber and immersing it in an ice-cold water bath. The supercritical fluid treated product was collected by washing with fresh solvent repeatedly.

Embodiment 2

[0038] Take 19mg of pre-prepared H 0.13 MnO 2 0.7H 2The O nanosheet material was added to a stainless steel reactor, injected with 9ml of DMF solvent, and dispersed ultrasonically for 12 minutes at low power; then the sealed reaction vessel was heated to 673.15K (395°C) in a professionally designed tube furnace, Leave on for 10 minutes. The pressure of the reactor is adjusted by pre-designing the volume of the reaction vessel, the amount of reactants and the temperature. The reaction was finally terminated by rapidly exiting the hot reactor chamber and immersing it in an ice-cold water bath. The supercritical fluid treated product was collected by washing with fresh solvent repeatedly.

Embodiment 3

[0040] Take 18 mg of pre-prepared H 0.13 MnO 2 0.7H 2 The O nanosheet material was added to a stainless steel reactor, injected with 9ml of DMF solvent, and dispersed ultrasonically for 10 minutes at low power; then the sealed reaction vessel was heated to 672.15K (392°C) in a professionally designed tube furnace, Leave on for 8 minutes. The pressure of the reactor is adjusted by pre-designing the volume of the reaction vessel, the amount of reactants and the temperature. The reaction was finally terminated by rapidly exiting the hot reactor chamber and immersing it in an ice-cold water bath. The supercritical fluid treated product was collected by washing with fresh solvent repeatedly.

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Abstract

The invention relates to a preparation method of a manganous-manganic oxide magnetic wave-absorbing filler, which is characterized by comprising the following steps: (1) early-stage preparation for obtaining reactants; (2) mixing a layer obtained after protonation with a used solvent according to a certain proportion, performing ultrasonic oscillation to disperse the mixture, injecting the mixtureinto a reaction container, and sealing the reaction container; (3) heating the reactor, raising the temperature of the reactor, enabling the reactor to reach a supercritical point, and maintaining the supercritical state for a period of time; (4) after a certain period of time, quickly cooling the reactor to finish the reaction; (5) cleaning and collecting reactants in the reactor; (6) separatingthe mixture, and conducting precipitating to obtain a multilayer manganese oxide nanosheet layer material and a bulk-phase manganese oxide material; and (7) obtaining a separated suspension liquid, namely, the nanometer manganese oxide material. The invention also provides another method for preparing the high-quality Mn3O4 nanosheet layer material, namely, a supercritical fluid method is utilized to obtain the Mn3O4 nanosheet-containing nano material from the layered material in one treatment process.

Description

technical field [0001] The present invention relates to a kind of manganese oxide (Mn 3 o 4 ) A method for preparing a magnetic wave-absorbing filler. Background technique [0002] Magnetic nanosheet materials are widely used in various fields of industry, especially in the electronics industry, where magnetic nanomaterials are basic industrial materials. Magnetic nanomaterials provide new basic conditions for the application and basic research of nanodevices and electronic and electromagnetic devices. Especially in recent years, the in-depth research on electromagnetic wave-absorbing composite materials often involves the use of magnetic materials. The size and shape of the material have certain requirements. Nanomagnetic materials can well meet the requirements of electromagnetic composite material design in terms of size and shape, while manganese oxide (Mn 3 o 4 ) material is a magnetic material, if there are sheets in the nano-manganese oxide material, it will prov...

Claims

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Application Information

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IPC IPC(8): C01G45/02B82Y40/00B82Y25/00
CPCC01G45/02B82Y40/00B82Y25/00C01P2004/20C01P2004/03C01P2004/01Y02P20/54
Inventor 易理希
Owner NANCHANG HANGKONG UNIVERSITY
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