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Europium doped cobalt ferrite composite and preparation method thereof

A technology of cobalt ferrite and composite materials, applied in iron compounds, chemical instruments and methods, inorganic chemistry, etc., to achieve the effects of less pollution, easy reaction, and easy industrialization

Inactive Publication Date: 2017-11-24
ANHUI UNIV OF SCI & TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Currently about Eu 2+ The effect of doping on the structure and magnetism of cobalt ferrite and its mechanism are rarely reported, and different preparation methods can prepare cobalt ferrite with different appearances, the purpose of which is to obtain better electromagnetic properties

Method used

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  • Europium doped cobalt ferrite composite and preparation method thereof
  • Europium doped cobalt ferrite composite and preparation method thereof
  • Europium doped cobalt ferrite composite and preparation method thereof

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Experimental program
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Effect test

Embodiment 1

[0029] A europium-doped cobalt ferrite (Co 0.8 Eu 0.2 Fe 2 o 4 Namely x=0.8) the preparation method of composite material, method step is as follows:

[0030] S1: Add 1.6mmol Co(NO 3 ) 3 ·6H 2 O, 0.4mmol Eu(NO 3 ) 3 ·6H 2 O and 4mmol Fe(NO 3 ) 3 9H 2 O, and fully stirred evenly, adding NaOH solution with a concentration of 5mol / L dropwise, adjusting the pH of the solution to 11, and continuously stirring for 20min.

[0031] S2: Move the solution into a reaction kettle, and react at a constant temperature of 180°C for 10 hours; after the reaction is completed, cool the solution to room temperature, and repeatedly centrifuge and wash the precipitate with deionized water and ethanol until the solution becomes neutral.

[0032] S3: Finally, dry in a vacuum oven at 60°C for 12 hours to obtain Co with x=0.8 0.8 Eu 0.2 Fe 2 o 4 Europium-doped cobalt ferrite composites.

Embodiment 2

[0034] A europium-doped cobalt ferrite (Co 0.85 Eu 0.15 Fe 2 o 4 Namely x=0.85) the preparation method of composite material, method step is as follows:

[0035] S1: Add 1.7mmol Co(NO 3 ) 3 ·6H 2 O, 0.3mmol Eu(NO 3 ) 3 ·6H 2 O and 4mmol Fe(NO 3 ) 3 9H 2 O, and fully stirred evenly, adding NaOH solution with a concentration of 5mol / L dropwise, adjusting the pH of the solution to 11.5, and continuously stirring for 20min.

[0036] S2: Move the solution into a reaction kettle, and react at a constant temperature of 180°C for 10 hours; after the reaction is completed, cool the solution to room temperature, and repeatedly centrifuge and wash the precipitate with deionized water and ethanol until the solution becomes neutral.

[0037] S3: Finally, dry in a vacuum oven at 60°C for 12 hours to obtain Co with x=0.85 0.85 Eu 0.15 Fe 2 o 4 Europium-doped cobalt ferrite composites.

Embodiment 3

[0039] A europium-doped cobalt ferrite (Co 0.9 Eu 0.1 Fe 2 o 4 Namely x=0.9) the preparation method of composite material, method step is as follows:

[0040] S1: Add 1.8mmol Co(NO 3 ) 3 ·6H 2 O, 0.2mmol Eu(NO 3 ) 3 ·6H 2 O and 4mmol Fe(NO 3 ) 3 9H 2 O, and fully stirred evenly, adding NaOH solution with a concentration of 5mol / L dropwise, adjusting the pH of the solution to 11.8, and continuously stirring for 20min.

[0041]S2: Move the solution into a reaction kettle, and react at a constant temperature of 180°C for 10 hours; after the reaction is completed, cool the solution to room temperature, and repeatedly centrifuge and wash the precipitate with deionized water and ethanol until the solution becomes neutral.

[0042] S3: Finally, dry in a vacuum oven at 60°C for 12 hours to obtain Co with x=0.9 0.9 Eu 0.1 Fe 2 o 4 Europium-doped cobalt ferrite composites.

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Abstract

The invention discloses a europium-doped cobalt ferrite composite material. Cobalt nitrate hexahydrate, europium nitrate hexahydrate and ferric nitrate nonahydrate are dissolved in deionized water according to different substance ratios, and the pH is adjusted to alkali by NaOH A simple one-step hydrothermal method was used to prepare rod-shaped nano-europium-doped cobalt ferrite materials. This method has a simple technological process and is easy to operate and control.

Description

technical field [0001] The invention relates to the technical field of composite materials, in particular to a europium-doped cobalt ferrite composite material and a preparation method thereof. Background technique [0002] Spinel-type cobalt ferrite is a ferrimagnetic material with unique physical, chemical and magnetic properties. Its high high-frequency magnetic permeability, magnetic crystal anisotropy, and coercive force and resistivity dozens of times higher than magnetic alloys make it widely used in communication broadcasting, mutual inductance devices, magnetic core bearings, microwave absorption etc. For the existing cobalt ferrite production process, it is easy to operate and easy to control, unlike metal magnetic materials that need to be rolled into thin sheets or made into fine powder media before they can be applied. In recent years, magnetic nanomaterials have received widespread attention, and the development of different types of nano-cobalt ferrites has ...

Claims

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Application Information

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IPC IPC(8): C01G49/00
CPCC01G49/009C01P2002/20C01P2002/72C01P2002/80C01P2004/04C01P2004/61C01P2006/40C01P2006/42
Inventor 邢宏龙申子瑶刘叶贾涵枭王欢
Owner ANHUI UNIV OF SCI & TECH
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