Method for making magnetic nano particle based on solution co-deposition

A technology of magnetic nanoparticles and co-precipitation method, which is applied in the direction of magnetism of inorganic materials, can solve problems such as difficult control of process conditions, particle size and dispersibility defects, and achieve the effect of avoiding agglomeration and good dispersibility

Inactive Publication Date: 2008-04-30
INST OF PROCESS ENG CHINESE ACAD OF SCI
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although the co-precipitation method has the above advantages, its process conditions are...

Method used

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  • Method for making magnetic nano particle based on solution co-deposition
  • Method for making magnetic nano particle based on solution co-deposition
  • Method for making magnetic nano particle based on solution co-deposition

Examples

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Embodiment 1

[0026] use as figure 1 device shown. Including ammonia gas cylinder 1, nitrogen gas cylinder 2, ammonia gas inlet 3, nitrogen gas inlet 4, sample solution tank 5, upper pulley 6, nitrogen gas discharge port 7, airtight container 8, stainless steel strip 9, isolation plate 10, lower pulley 11, Sample collection tank 12, ammonia discharge port 13;

[0027] In an airtight container 8, it is divided into upper and lower two containers by a separating plate 10, a sample collection tank 12 is arranged in the lower container, a lower pulley 11 is installed in the sample collection tank, and an upper pulley 6 is installed in the upper container above the lower pulley , the upper pulley 6 and the lower pulley 11 are connected with a thin stainless steel belt 9, and the stainless steel belt is driven to rotate by the pulley; a sample solution tank 5 is fixed on the upper pulley 6;

[0028] Ammonia gas discharge port 13 is arranged on the bottom side wall of airtight container 8, and n...

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Abstract

The invention belongs to powder preparation field, more particularly relates to a method for preparing spherical magnetic Fe3O4 nanoparticles by using the coprecipitation method of a solution layer. The method comprises the steps of: forming a solution layer from the mixed alcohol solution of ferric salt and ferrous salt on a stainless steel band in a sealed container, and adding ammonia gas as precipitant to react with reactant in the solution layer to generate spherical Fe3O4 particles. In the reaction, the presence of water molecules is reduced to effectively obviate particle agglomeration. The thickness of the solution layer can be adjusted by applying the solution, and the diameter of the Fe3O4 particle can be controlled to a range from several nanometers to dozens of nanometers by controlling the concentration of the reactant alcohol solution and the thickness of the solution layer, thereby achieving good dispersivity.

Description

technical field [0001] The invention belongs to the field of powder preparation, in particular to a solution layer co-precipitation method for preparing spherical magnetic nanoparticles Fe 3 o 4 Methods. technical background [0002] Magnetic nanoparticles, especially nano-Fe with superparamagnetism 3 o 4 Particles have attracted much attention in recent years. Magnetic nano-Fe 3 o 4 It has the characteristics of both magnetic materials and nanomaterials, and is widely used in many fields such as information, biology, medicine, lubrication and magnetic fluid. [0003] It is believed that one of the main reasons for the agglomeration of nanoparticles is the presence of water in the reaction process, and hydrogen bonds are formed between the particles and water molecules. Due to the magnetic effect, the agglomeration of nano magnetic particles is stronger. Currently Fe 3 o 4 The preparation methods mainly include physical methods, chemical methods and biological sour...

Claims

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Application Information

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IPC IPC(8): H01F1/36C04B35/26C04B35/622
Inventor 刘会洲江洋洋郭晨安震涛
Owner INST OF PROCESS ENG CHINESE ACAD OF SCI
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