Method for preparing Co1-xNixFe2O4 magnetic nano-powder by solvothermal method

A co1-xnixfe2o4, cobalt-nickel ferrite technology, applied in the field of cobalt-nickel ferrite magnetic nano-powder preparation by solvothermal method, can solve the problems of complex process steps, impure crystal phase, large particle size, etc., and achieve magnetization The effect of high strength, pure crystal phase and small grain size

Inactive Publication Date: 2010-11-24
DONGHUA UNIV
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  • Abstract
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Problems solved by technology

[0005] However, the current preparation of Co 1-x Ni x Fe 2 o 4 The method mainly has the following defects: the process steps are more complicated, the cost is higher, and the produced Co 1-x Ni x Fe 2 o 4 The crystal phase is impure and the particle size is large
At present, there is no use of ethylene glycol methyl ether as a solvent to prepare Co in a lower temperature range (180-220°C). 1-x Ni x Fe 2 o 4 A report on magnetic nanopowder

Method used

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  • Method for preparing Co1-xNixFe2O4 magnetic nano-powder by solvothermal method
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  • Method for preparing Co1-xNixFe2O4 magnetic nano-powder by solvothermal method

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Experimental program
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Embodiment 1

[0027] Weigh 2.0192g ferric nitrate nonahydrate, 0.5821g cobalt nitrate hexahydrate, and 0.1454g nickel nitrate hexahydrate, add to a three-necked flask, then add 50ml of analytically pure ethylene glycol methyl ether solution, and after fully stirring, Fe in the solution 3+ The molar concentration is 0.1mol / L. Then add 1.8g of anhydrous sodium acetate and mechanically stir for 30min at a speed of 500 rpm. After the solution is completely dissolved, pour the above solution into the reaction kettle, raise the temperature to 200°C, and react for 12h. After the reaction was completed, the product was washed with distilled water and absolute ethanol, and centrifuged three times, and then the product was dried at 80°C for 12 hours to obtain Co 1-x Ni x Fe 2 o 4 Nano powder. figure 1 It is the X-ray diffraction pattern of the powder synthesized in this embodiment, and the diffraction peaks in the figure show that the nanopowder is Co 0.8 Ni 0.2 Fe 2 o 4 , Scherrer's formula ca...

Embodiment 2

[0029] Weigh 2.0192g ferric nitrate nonahydrate, 0.4366g cobalt nitrate hexahydrate, and 0.2908g nickel nitrate hexahydrate, add to a three-necked flask, then add 40ml of analytically pure ethylene glycol methyl ether solution, and stir fully, Fe in the solution 3+ The molar concentration is 0.125mol / L. Then add 3.0 g of anhydrous sodium acetate and mechanically stir for 40 min at a rotation speed of 300 rpm. After it is completely dissolved, pour the above solution into the reaction kettle, raise the temperature to 220° C., and react for 8 h. After the reaction was completed, the product was washed with distilled water and absolute ethanol, and centrifuged three times, and then the product was dried at 40°C for 24 hours to obtain Co 1-x Ni x Fe 2 o 4 Nano powder. The XRD test results show that the nanopowder is Co 0.6 Ni 0.4 Fe 2 o 4 , Scherrer's formula calculation shows that the grain size of the synthetic powder is about 5.1nm. Scanning electron microscope observa...

Embodiment 3

[0031] Weigh 2.0192g ferric nitrate nonahydrate, 0.3638g cobalt nitrate hexahydrate, and 0.3635g nickel nitrate hexahydrate, add to a three-necked flask, then add 60ml of analytically pure ethylene glycol methyl ether solution, and stir fully, Fe in the solution 3+ The molar concentration is 0.083mol / L. Then add 4.5g of anhydrous sodium acetate and mechanically stir for 20min at a speed of 600 rpm. After the solution is completely dissolved, pour the above solution into the reaction kettle, raise the temperature to 180°C, and react for 16h. After the reaction was completed, the product was washed with distilled water and absolute ethanol, and centrifuged three times, and then the product was dried at 60°C for 18 hours to obtain Co 1-x Ni x Fe 2 o 4 Nano powder. The XRD test results show that the nanopowder is Co 0.5 Ni 0.5 Fe 2 o 4 , Scherrer's formula calculation shows that the grain size of the synthetic powder is about 5.2nm. Scanning electron microscope observatio...

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Abstract

The invention relates to a method for preparing Co1-xNixFe2O4 magnetic nano-powder by a solvothermal method. The method comprises the following steps of: (1) weighing soluble ferric salt, nickel salt and cobalt salt at room temperature, dispersing the soluble ferric salt, the nickel salt and the cobalt salt into solution of ethylene glycol monomethyl ether, adding anhydrous sodium acetate after the salts are fully dissolved and stirring the mixture to form reaction liquid; (2) putting the reaction liquid into a reaction kettle, raising the temperature to be between 180 and 220 DEG C and performing a reaction for 8 to 16 hours; and (3) cooling the reaction product to the room temperature, washing the product by using distilled water and absolute ethyl alcohol respectively and drying the washed product to obtain the Co1-xNixFe2O4 magnetic nano-powder. The preparation method of the invention is simple and easy for industrialized production. The prepared Co1-xNixFe2O4 magnetic nano-powderhas pure crystalline phase, small crystallite dimension and high magnetization intensity.

Description

technical field [0001] The present invention belongs to cobalt nickel ferrite (Co 1-x Ni x Fe 2 o 4 ) field of preparation of magnetic nanopowders, particularly related to a solvothermal method for cobalt-nickel ferrite (Co 1-x Ni x Fe 2 o 4 ) method of magnetic nano powder. Background technique [0002] Nanomagnetic particles have unique structures and magnetic properties, and have broad application prospects in many fields such as biology, medicine, and environmental protection. The properties of non-uniform ferrites formed by partial ion substitution often have a wide range of options to meet the needs of different applications. Many research works have also been carried out around this idea. [0003] CoFe 2 o 4 Ferrite is a permanent magnet material with excellent performance, which has excellent properties such as high magnetization, large anisotropy constant of magnetocrystalline, and good chemical stability. However, CoFe 2 o 4 The magnetocrystalline anis...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/626C04B35/26
Inventor 李耀刚唐亚王宏志张青红
Owner DONGHUA UNIV
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