Flower-like Y-shaped hexagonal ferrite-manganese dioxide nano-powder and preparation method thereof

A technology of hexagonal ferrite and nano-powder, applied in chemical instruments and methods, manganese oxide/hydroxide, nanotechnology and other directions, can solve the problems of difficult synthesis of Y powder, complex crystal structure, etc. The effect of reflection, large specific surface area, and high reflection loss

Inactive Publication Date: 2019-03-08
XIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to Co 2 The crystal structure of Y is complex, and it is difficult to directly synthesize Co with a flower-like structure. 2 Y powder

Method used

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  • Flower-like Y-shaped hexagonal ferrite-manganese dioxide nano-powder and preparation method thereof
  • Flower-like Y-shaped hexagonal ferrite-manganese dioxide nano-powder and preparation method thereof
  • Flower-like Y-shaped hexagonal ferrite-manganese dioxide nano-powder and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0074] A flower-shaped Co of the present invention 2 Y-MnO 2 The preparation method of nanopowder specifically implements according to the following steps:

[0075] Step 1, prepare Ba by solid-phase method 2 co 2 Fe 12 o 22 (Co 2 Y) powder, specifically:

[0076] In step 1.1, pure grade BaCO will be analyzed 3 , CoO, Fe 2 o 3 Mix with absolute ethanol evenly to obtain a precursor mixture, then add zirconium balls to the precursor mixture for ball milling for 1 hour, and then dry at 100°C for 3 hours to obtain a solid mixture;

[0077] BaCO 3 , CoO, Fe 2 o 3 The stoichiometric ratio is 1:1:6, BaCO 3 , CoO, Fe 2 o 3 The mass ratio of total mass to absolute ethanol and zirconium balls is 5:4:10;

[0078] The diameter of the zirconium ball is 2mm;

[0079] Step 1.2, calcining the solid mixture obtained after step 1.1, and cooling with the furnace to obtain a mixed powder;

[0080] The calcination temperature is 1100°C, and the calcination time is 2h;

[0081] Step...

Embodiment 2

[0095] A flower-shaped Co of the present invention 2 Y-MnO 2 The preparation method of nanopowder specifically implements according to the following steps:

[0096] Step 1, prepare Ba by solid-phase method 2 co 2 Fe 12 o 22 (Co 2 Y) powder, specifically:

[0097] In step 1.1, pure grade BaCO will be analyzed 3 , CoO, Fe 2 o 3 Mix well with absolute ethanol to obtain a precursor mixture, then add zirconium balls to the precursor mixture for ball milling for 1.5 hours, and then dry at 110°C for 4 hours to obtain a solid mixture;

[0098] BaCO 3 , CoO, Fe 2 o 3 The stoichiometric ratio is 1:1:6, BaCO 3 , CoO, Fe 2 o 3 The mass ratio of total mass to absolute ethanol and zirconium balls is 5:4:10;

[0099] The diameter of the zirconium ball is 2mm;

[0100] Step 1.2, calcining the solid mixture obtained after step 1.1, and cooling with the furnace to obtain a mixed powder;

[0101] The calcination temperature is 1150°C, and the calcination time is 2h;

[0102] S...

Embodiment 3

[0116] A flower-shaped Co of the present invention 2 Y-MnO 2 The preparation method of nanopowder specifically implements according to the following steps:

[0117] Step 1, prepare Ba by solid-phase method 2 co 2 Fe 12 o 22 (Co 2 Y) powder, specifically:

[0118] In step 1.1, pure grade BaCO will be analyzed 3 , CoO, Fe 2 o 3 Mix well with absolute ethanol to obtain a precursor mixed solution, then add zirconium balls to the precursor mixed solution for ball milling, the ball milling time is 2 hours, and then dry at 110°C for 5 hours to obtain a solid mixture;

[0119] BaCO 3 , CoO, Fe 2 o 3 The stoichiometric ratio is 1:1:6, BaCO 3 , CoO, Fe 2 o 3 The mass ratio of total mass to absolute ethanol and zirconium balls is 5:4:10;

[0120] The diameter of the zirconium ball is 2mm;

[0121] Step 1.2, calcining the solid mixture obtained after step 1.1, and cooling with the furnace to obtain a mixed powder;

[0122] The calcination temperature is 1100°C, and the c...

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Abstract

The invention discloses flower-like Y-shaped hexagonal ferrite-manganese dioxide nano-powder. The flower-like Y-shaped hexagonal ferrite-manganese dioxide nano-powder is formed by compounding CO2Y powder and a MnO2 nanosheet, wherein the mass fraction of the CO2Y powder accounts for 30-60%, the mass fraction of MnO2 accounts for 40-70%, and the sum of the mass percentages of the components is 100%. The invention further discloses a preparation method. The preparation method comprises the following steps that the Co2Y powder is prepared through a solid-phase method, and then the MnO2 nanosheetwith a flower-like structure quantitatively grows on the surface of the Co2Y powder through a hydrothermal method so as to form the Co2Y-MnO2 nano-powder with a flower-shaped multilevel structure. According to the flower-like Y-shaped hexagonal ferrite-manganese dioxide nano-powder and the preparation method thereof, a layer of flower-like MnO2 is wrapped around the surface of the Co2Y powder of the flower-like structure, so that the absorption rate of electromagnetic waves is increased, the specific surface area of the material is increased so as to increase the multiple reflection of the material, and therefore the purpose of high reflection loss is achieved.

Description

technical field [0001] The invention belongs to the technical field of preparation of wave-absorbing materials, and in particular relates to a flower-shaped Y-shaped hexagonal ferrite-manganese dioxide nanometer powder, and also relates to a preparation method of the nanometer powder. Background technique [0002] Today, with the rapid development of electronic communication technology, we are in an environment full of electromagnetic waves, which are more and more harmful to people. In life, electromagnetic pollution to human health due to the frequent use of electronic equipment is becoming increasingly serious; in work, electromagnetic interference may cause operation errors or damage to precision electronic communication instruments; in the military field, the attack and survivability of weapons and equipment on the battlefield are both Being seriously threatened, low detectable technology (radar wave stealth technology) has become one of the commanding heights of milita...

Claims

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Application Information

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IPC IPC(8): C01G51/00C01G45/02B82Y40/00B82Y30/00
CPCB82Y30/00B82Y40/00C01G45/02C01G51/006C01P2002/72C01P2004/03C01P2004/30C01P2004/84
Inventor 何立郭毅仲祖霆姚玺王楠楠巩思涵
Owner XIAN UNIV OF TECH
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