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Method for synthesizing spherical superparamagnetic ferrite nano druse

A technology of superparamagnetic magnets and synthesis methods, which is applied in nanotechnology, nanotechnology, nanostructure manufacturing, etc., can solve problems such as application limitations, and achieve the effects of uniform shape, stable properties, and narrow particle size distribution

Inactive Publication Date: 2010-12-15
XIAMEN UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above methods are all deficient in raw material addition, reaction product, reaction conditions; Applications in the industrial field are limited

Method used

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  • Method for synthesizing spherical superparamagnetic ferrite nano druse
  • Method for synthesizing spherical superparamagnetic ferrite nano druse
  • Method for synthesizing spherical superparamagnetic ferrite nano druse

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0029] 1) Measure 16ml of ethylene glycol solution.

[0030] 2) Dissolve 404 mg of ferric nitrate nonahydrate and 120 mg of urea in the solution of step 1), and sonicate to make the solution uniform.

[0031] 3) Transfer the solution obtained in 2) into a polytetrafluoroethylene liner with a volume of 18 ml.

[0032] 4) Put the inner lining in the steel kettle, screw it tightly and put it into the oven. 180℃ constant temperature for 12h.

[0033] 5) After the reaction is completed, the reaction kettle is cooled down to room temperature with the oven, the solution in the polytetrafluoroethylene lining is poured out, and centrifuged to obtain a solid product, which is washed several times with ethanol and water in turn to obtain the target product.

[0034] Depend on figure 2 It can be seen that the spherical ferric oxide nano-clusters have a uniform morphology, a particle size of about 220 nm, and a primary particle size of about 10 nm. Depend on figure 1 (a) It can be se...

Embodiment 2

[0036] 1) Measure 16ml of ethylene glycol solution.

[0037] 2) Dissolve 404 mg of ferric nitrate nonahydrate, 68 mg of zinc chloride and 120 mg of urea in the solution of step 1), and ultrasonically make the solution uniform.

[0038] 3) Transfer the solution obtained in 2) into a polytetrafluoroethylene liner with a volume of 18 ml.

[0039] 4) Put the inner lining in the steel kettle, screw it tightly and put it into the oven. Constant temperature at 200°C for 12h.

[0040]5) After the reaction is completed, the reaction kettle is cooled down to room temperature with the oven, the solution in the polytetrafluoroethylene lining is poured out, and centrifuged to obtain a solid product, which is washed several times with ethanol and water in turn to obtain the target product.

[0041] Depend on image 3 It can be seen that the particle size of the obtained spherical zinc ferrite nanoclusters is about 350 nm, and the size of the primary particles is about 11 nm. Depend on ...

Embodiment 3

[0043] 1) Measure 16ml of ethylene glycol solution.

[0044] 2) Dissolve 404 mg of ferric nitrate nonahydrate, 99 mg of manganese chloride tetrahydrate and 120 mg of urea in the solution of step 1), and ultrasonically make the solution uniform.

[0045] 3) Transfer the solution obtained in 2) into a polytetrafluoroethylene liner with a volume of 18 ml.

[0046] 4) Put the inner lining in the steel kettle, screw it tightly and put it into the oven. Constant temperature at 200°C for 12h.

[0047] 5) After the reaction is completed, the reaction kettle is cooled down to room temperature with the oven, the solution in the polytetrafluoroethylene lining is poured out, and centrifuged to obtain a solid product, which is washed several times with ethanol and water in turn to obtain the target product.

[0048] Depend on Figure 4 It can be seen that the particle size of the obtained spherical manganese ferrite nanoclusters is about 200 nm. The size of the primary particles is abo...

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Abstract

The invention discloses a method for synthesizing a spherical superparamagnetic ferrite nano druse, relates to a ferrite nano druse and provides a method for directly synthesizing the spherical superparamagnetic ferrite nano druse without adding a protective agent. The method comprises the following steps of: preparing solution required by a spherical ferroferric oxide nano druse, namely dissolving ferric salt and urea in an ethylene glycol solvent to obtain solution A, wherein the molar ratio of the ferric salt to the urea is 1:(2-4); adding divalent metal salt into the solution A to obtain solution B, wherein the molar ratio of the divalent metal salt to the ferric salt is 2:(1-2); ultrasonically mixing the solution A and the solution B, putting the mixture into a polytetrafluoroethylene lining, and then putting the polytetrafluoroethylene lining into a steel kettle at constant temperature; and cooling the polytetrafluoroethylene lining at room temperature and washing black precipitates to obtain the spherical superparamagnetic ferrite nano druse.

Description

technical field [0001] The invention relates to a ferrite nano-crystal cluster, in particular to a method for synthesizing spherical superparamagnetic ferrite nano-cluster by a solvothermal method. Background technique [0002] Nanomaterials have received extensive attention in recent years due to their unique morphology and size-dependent properties, which have novel properties different from those of bulk materials. Superparamagnetic nanomaterials can be magnetized under the action of an external magnetic field. After the external magnetic field disappears, the magnetization of the material is basically zero. Based on this characteristic, superparamagnetic nanomaterials have broad application prospects in many fields such as color imaging, magnetic refrigeration, protein separation, drug delivery, and nuclear magnetic resonance imaging, and have become a focus of nanotechnology research. Ferrite is a magnetic material of oxide system. It is a composite oxide mainly compos...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26B82B3/00
Inventor 黄荣彬李悦方晓亮谢素原郑兰荪
Owner XIAMEN UNIV
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