Preparation method of micrometer-scale cubic ultrodispersed ferroferric oxide particles

A technology of ferroferric oxide and cubes, which is applied in the field of preparation of ultra-dispersed ferroferric oxide particles, which can solve the problems of difficult preparation of ferric oxide particles and small particles of ferroferric oxide

Inactive Publication Date: 2012-03-28
SOUTHEAST UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

The above two methods all realize the preparation of ferroferric oxide in an alkaline environment. The particles of ferric oxide prepared in an alkaline environment are small, generally 100-5 nm, and it is difficult to prepare ferric oxide with larger particles particles

Method used

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  • Preparation method of micrometer-scale cubic ultrodispersed ferroferric oxide particles
  • Preparation method of micrometer-scale cubic ultrodispersed ferroferric oxide particles
  • Preparation method of micrometer-scale cubic ultrodispersed ferroferric oxide particles

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preparation example Construction

[0018] A kind of preparation method of the ultra-dispersed iron ferric oxide particle that is a micron-sized cube of the present invention comprises the following steps:

[0019] 101. Dissolve ferric salt and ferrous salt with a molar ratio of 2:1 in deionized water to form a reaction solution.

[0020] 102. Add hydrogen peroxide to the reaction solution obtained in step 101. After reacting for 30 minutes, drop an alkaline solution into the reaction solution to adjust the pH of the reaction solution to 9-10 to form a suspension.

[0021] In this step, the concentration of hydrogen peroxide in the hydrogen peroxide is 30%, that is, the mass fraction of hydrogen peroxide in the hydrogen peroxide is 30%. The volume percentage of hydrogen peroxide and the reaction liquid is 0.6%-4%.

[0022] 103. Put the suspension obtained in step 102 in a stainless steel reaction kettle with a tetrafluoroethylene bottom pad, and put the stainless steel reaction kettle in an oven at 120-180°C. A...

Embodiment 1

[0031] Dissolve 2.7 grams of ferric chloride and 1 gram of ferrous chloride in 100 mL of deionized water, then add 1 mL of hydrogen peroxide, react for 30 minutes, add 1 mL of ammonia water dropwise, and place the reaction solution on a 50 mL tetrafluoroethylene pad In a stainless steel reaction kettle, put the reaction kettle at 120°C for 12 hours, and then cool to room temperature to obtain cubic ferric oxide particles; wash the ferric oxide particles with deionized water three times to remove the residues on the surface of the particles The ferric ions were vacuum dried for 2 hours, placed in a muffle furnace at 300°C for 12 hours and then cooled to room temperature to obtain ferric iron tetroxide particles. The finally obtained iron ferric oxide particles were characterized by a scanning electron microscope with a magnification of 1500 times, as shown in figure 1 As shown, the particle size of the ferroferric oxide particles is 3 μm, the gap between the particles is large...

Embodiment 2

[0033] Dissolve 5.4 grams of ferric chloride and 2 grams of ferrous chloride in 100 mL of deionized water, add 1 mL of hydrogen peroxide, react for 30 minutes, drop 1 mL of 1mol / L NaOH solution, and place the reaction solution in 50 mL of tetrafluoroethylene Put the reaction kettle in a stainless steel reaction kettle with ethylene bottom pad, put the reaction kettle in an oven at 160°C and react for 12 hours, then cool to room temperature to obtain cubic ferric oxide particles, wash the ferric oxide particles three times with deionized water , remove iron ions remaining on the surface of ferric oxide particles, vacuum dry for 2 hours, place in a muffle furnace at 500°C for calcination for 6 hours, and obtain ferric oxide particles. Identical to the test method adopted in Example 1, the finally obtained ferric oxide particles are characterized by a scanning electron microscope and an X-ray diffractometer. The ferric oxide particles are cubic, and meanwhile, the particle diamete...

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Abstract

The invention discloses a preparation method of micrometer-scale cubic ultrodispersed ferroferric oxide particles. The preparation method comprises the following steps of: 101, dissolving a trivalent ferric salt and a divalent ferric salt in deionized water to form reaction liquid; 102, adding hydrogen peroxide to the reaction liquid, dropwise adding an alkaline solution, and regulating the pH value of the reaction liquid to 9-10 to form suspension liquid; 103, feeding the suspension liquid to a stainless steel reaction kettle with a tetrafluoroethylene base pad, putting the stainless steel reaction kettle into a drying box, reacting for 12h, and then cooling to room temperature to obtain ferroferric oxide particles; 104, washing the ferroferric oxide particles by using deionized water and drying the particles; and 105, putting the ferroferric oxide particles obtained in the step 104 in a muffle furnace to obtain the ferroferric oxide particles. The ferroferric oxide particles prepared by using the preparation method disclosed by the invention have micrometer-scale size, regular cubic shape and good dispersibility.

Description

technical field [0001] The invention belongs to the technical field of preparing ultrafine powders, and in particular relates to a method for preparing ultra-dispersed iron ferric oxide particles in the form of micron-sized cubes. Background technique [0002] At present, due to its good chemical stability, easy to obtain raw materials and relatively simple production process, the superfine powder particles of ferroferric oxide have been widely used in magnetic functional materials, such as magnetic recording materials, magnetic separation materials and magnetic pigments. Functional Materials. However, the dispersion of magnetic materials directly affects its application prospects. Therefore, the research on preparing magnetic materials with uniform particle size, regular shape and strong magnetism has become the focus of magnetic material research. There are many methods for preparing ferric oxide particles, and there are two commonly used methods. One is to directly react...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G49/08B82Y40/00
Inventor 何农跃李小龙李智洋李国鹏
Owner SOUTHEAST UNIV
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