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Method for controlling morphology and performance of ferriferrous oxide

A technology of ferroferric oxide and morphology, applied in the field of inorganic materials, to achieve the effects of concentrated particle size distribution, high purity, and strong product controllability

Active Publication Date: 2012-09-12
ZHONGBEI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

Although ferroferric oxide with different shapes can be obtained by different methods, so far there is no simple and efficient method to achieve the transformation of ferric oxide particle morphology

Method used

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  • Method for controlling morphology and performance of ferriferrous oxide
  • Method for controlling morphology and performance of ferriferrous oxide
  • Method for controlling morphology and performance of ferriferrous oxide

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] According to the preparation process, 1.2 g FeCl 3 ·6H 2 O and 0.834 g of tetrabutylammonium chloride were added to 30 mL of ethylene glycol, and magnetically stirred to completely dissolve ferric chloride hexahydrate and tetrabutylammonium chloride to obtain a clear solution. 3.6 g of urea was added to the above clear solution, and under the action of magnetic stirring, it was fully mixed to obtain a reddish-brown clear solution. The solution was sealed and placed in a polytetrafluoroethylene-lined reactor with a volume of 50 mL, and the reactor was placed in an oven, heated to 180 °C, and reacted for 36 h. After the reaction, the obtained black precipitate was washed by centrifugation with deionized water and absolute ethanol three times, and then dried at 60°C for 12 h to obtain ferric oxide particles. Scanning electron microscope observation and magnetic performance test results see figure 1 . The characterization shows that the morphology of the product is sphe...

Embodiment 2

[0027] According to the preparation process, 1.2 g FeCl 3 ·6H 2 O and 0.834 g of tetrabutylammonium chloride were added to 30 mL of ethylene glycol, and magnetically stirred to completely dissolve ferric chloride hexahydrate and tetrabutylammonium chloride to obtain a clear solution. 3.6 g of urea was added to the above clear solution, and under the action of magnetic stirring, it was fully mixed to obtain a reddish-brown clear solution. The solution was sealed and placed in a polytetrafluoroethylene-lined reactor with a volume of 50 mL, and the reactor was placed in an oven, heated to 220 °C, and reacted for 36 h. After the reaction, the obtained black precipitate was washed by centrifugation with deionized water and absolute ethanol three times respectively, and then dried at 60°C for 12 h to obtain ferric oxide particles. Scanning electron microscope observation and magnetic performance test results see figure 2 . The characterization shows that the morphology of the p...

Embodiment 3

[0029] According to the preparation process, 1.2 g FeCl 3 ·6H 2 O and 0.834 g of tetrabutylammonium chloride were added to 30 mL of ethylene glycol, and magnetically stirred to completely dissolve ferric chloride hexahydrate and tetrabutylammonium chloride to obtain a clear solution. 3.6 g of urea was added to the above clear solution, and under the action of magnetic stirring, it was fully mixed to obtain a reddish-brown clear solution. The solution was sealed and placed in a polytetrafluoroethylene-lined reactor with a volume of 50 mL, and the reactor was placed in an oven, heated to 200 °C, and reacted for 8 h. After the reaction, the obtained black precipitate was washed by centrifugation with deionized water and absolute ethanol three times respectively, and then dried at 60°C for 12 h to obtain ferric oxide particles. Scanning electron microscope observation and magnetic performance test results see image 3 . The characterization shows that the morphology of the pro...

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Abstract

The invention discloses a method for controlling morphology and performance of a ferriferrous oxide and belongs to the technical field of inorganic materials. The method comprises the following steps of: dissolving ferric trichloride hexahydrate in ethylene glycol to prepare a solution of which the ferric trichloride concentration is 0.15-0.35mol / L; then, adding urea and a surface active agent; fully dissolving to obtain a homogeneous solution; transferring the homogeneous solution into a high-pressure reaction kettle with a polytetrafluoroethylene lining; performing a solvent thermal reaction at the temperature of 170-230 DEG C for 6-72 hours; performing centrifugal separation after the reaction is ended; washing deposits by using deionized water and alcohol; and then, drying in a drying oven to obtain a finished product. The method for controlling the morphology and the performance of the ferriferrous oxide has the advantages that the production cost is low; the preparation technology is safe and simple; the product controllability is strong; and toxic and harmful substances are not generated in the preparation process. The obtained ferriferrous oxide is high in purity and centralized in particle size distribution, and the morphology can be mutually converted among a spherical structure, a microporous structure and a hollow structure.

Description

technical field [0001] The invention belongs to the technical field of inorganic materials, and in particular relates to a method for controlling the morphology and properties of ferroferric oxide. Background technique [0002] Compared with other conventional crystals, ordered magnetic ferrite has better optical, electrical, magnetic and catalytic properties. In recent years, the research on the preparation and properties of ferrite fine particles has aroused widespread concern in the scientific community and has developed rapidly. [0003] Ferric oxide (Fe 3 o 4 ) is one of the most important soft magnetic materials with spinel structure, which has the advantages of low coercive force and high saturation magnetization, and can be widely used in high-end fields such as information storage, electronic devices, drug delivery, and magnetic resonance imaging. Nanoscale iron ferric oxide has potential application prospects in magnetic fluids, medical targeting materials, targ...

Claims

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Application Information

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IPC IPC(8): C01G49/08B82Y40/00
Inventor 赵贵哲周兴刘亚青王晓峰
Owner ZHONGBEI UNIV
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