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Preparation method of manganese-zinc ferrite magnetic nano microsphere

A technology of manganese zinc ferrite and magnetic nanometers, which is applied in the field of preparation of magnetic nanospheres, can solve the problems of many process steps, uncontrollable shape, impure crystal phase, etc., and achieve simple preparation process and simple production equipment requirements , crystal phase pure effect

Inactive Publication Date: 2008-11-19
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0005] However, the present preparation of Mn 1-x Zn x Fe 2 o 4 The method mainly has the following defects, the process steps are more, the cost is higher, and the prepared Mn 1-x Zn x Fe 2 o 4 The crystal phase is impure, the shape is uncontrollable, and it is easy to agglomerate. Therefore, it is necessary to find a one-step method to prepare nano-Mn with pure crystal phase, not easy to agglomerate, and high magnetization. 1-x Zn x Fe 2 o 4 become a research hotspot

Method used

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  • Preparation method of manganese-zinc ferrite magnetic nano microsphere
  • Preparation method of manganese-zinc ferrite magnetic nano microsphere
  • Preparation method of manganese-zinc ferrite magnetic nano microsphere

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Experimental program
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Embodiment 1

[0028]Weigh 1.351g ferric chloride, 0.1487g zinc nitrate hexahydrate, 0.338g manganese sulfate monohydrate, add to a three-necked flask, then add 50ml ethylene glycol, 3.6g anhydrous sodium acetate, 1ml polyethylene glycol, 0.01g The polyvinylpyrrolidone was mechanically stirred for 30 minutes at a rotation speed of 350 rpm. After it was completely dissolved, the above solution was poured into a reaction kettle, and the temperature was raised to 200°C for 12 hours of reaction. After the reaction was completed, the product was collected with a magnet, washed with deionized water, and then dried at 60° C. for 15 hours to obtain magnetic nanospheres.

[0029] figure 1 For the X-ray diffraction pattern of the magnetic nano-microspheres synthesized in this embodiment, it can be seen that the diffraction peaks are consistent with the diffraction peaks of the manganese-zinc ferrite in the cubic phase, and no diffraction of other oxides belonging to manganese, zinc, and iron is found....

Embodiment 2

[0031] Weigh 1.351g of ferric chloride, 0.2975g of zinc nitrate hexahydrate, 0.2535g of manganese sulfate monohydrate, add to a three-necked flask, then add 55ml of ethylene glycol, 3.8g of anhydrous sodium acetate, 1.1ml of polyethylene glycol, 0.012 g of polyvinylpyrrolidone, mechanically stirred at 450 rpm for 20 minutes, and after being completely dissolved, pour the above solution into a reaction kettle, raise the temperature to 210° C., and react for 11 hours. After the reaction was completed, the product was collected with a magnet, washed with deionized water, and then dried at 50° C. for 24 hours to obtain magnetic nanospheres.

[0032] The X-ray test results show that the diffraction peaks are consistent with the diffraction peaks of the cubic phase manganese zinc ferrite, and no diffraction peaks belonging to other oxides of manganese, zinc, and iron are found, indicating that there is no impurity phase. Analysis and comparison by XRD data analysis software (JADE5.0...

Embodiment 3

[0034] Weigh 1.351g of ferric chloride, 0.4462g of zinc nitrate hexahydrate, 0.169g of manganese sulfate monohydrate, add to a three-necked flask, then add 45ml of ethylene glycol, 4 grams of anhydrous sodium acetate, 0.8ml of polyethylene glycol, 0.01 g of polyvinylpyrrolidone, mechanically stirred for 20 minutes at a rotational speed of 450 rpm, and after being completely dissolved, pour the above solution into a reaction kettle, raise the temperature to 190° C., and react for 10 hours. After the reaction was completed, the product was collected with a magnet, washed with deionized water, and then dried at 55° C. for 20 h to obtain magnetic nanospheres.

[0035] The X-ray test results show that the diffraction peaks are consistent with the diffraction peaks of the cubic phase manganese zinc ferrite, and no diffraction peaks belonging to other oxides of manganese, zinc, and iron are found, indicating that there is no impurity phase. The comparison was analyzed by XRD data ana...

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Abstract

The invention relates to a method for preparing a Mn-Zn ferrite magnetic nano-sphere, which comprises the following steps: (1) weighting soluble iron salt, zinc salt and manganese salt according to the stoichiometric proportion at the normal temperature, and adding into 40-60ml of solvent with 98-99.5wt% of glycol; (2) adding 0.4-1.2ml of polyethylene glycol and 0.01-0.02g of polyvinyl pyrrolidon dispersant, adding 3.5-5g of alkaline additive, and mechanically stirring for 20-40min; (3) putting the soluble mixture into a reaction kettle, heating to 180-220DEG C, reacting for 8-12h, cooling to the room temperature, collecting the reaction product by a magnet, washing the product by deionized water, and drying to obtain the Mn-Zn ferrite Mn1-xZnxFe2O4 magnetic nano-sphere, wherein x ranges from 0.2 to 0.8. The invention has simple preparation process and easy industrialized production, and the obtained magnetic nano-sphere has pure crystal phase, good dispersibility and high magnetization.

Description

technical field [0001] The invention belongs to the field of preparation of magnetic nano microspheres, in particular to a preparation method of manganese zinc ferrite magnetic nano microspheres. Background technique [0002] Ferrite nanoparticles have broad application prospects in high-tech fields because of their physical effects such as surface effect, small size effect, quantum size effect, and macroscopic quantum tunneling effect, as well as excellent magnetic properties. [0003] MnZn ferrite is an important magnetic material. On the one hand, it has the characteristics of high magnetic permeability, high saturation magnetization, and low loss in medium and high frequencies, so it is widely used in filters, broadband transformers, common mode choke coils, and signals of various communication and transmission equipment. transmission system, as well as lighting transformers, electronic ballasts, etc. in daily life and buildings; Materials and drug targeting materials ...

Claims

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Application Information

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IPC IPC(8): B22F9/16
Inventor 李耀刚张祺王宏志朱美芳张青红袁素珺
Owner DONGHUA UNIV
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