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Method for preparing one-dimensional spinel type ferrite AxB1-xFe2O4 through chemical plating

An axb1-xfe2o4, spinel-type technology, applied in the field of one-dimensional spinel-type ferrite obtained after high-temperature roasting, can solve the problems of low productivity and long time consumption, and achieve low cost, simple reaction conditions, and reaction equipment simple effect

Active Publication Date: 2012-10-10
深圳凯纳方科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, there are generally disadvantages such as low productivity and long time consumption.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0066] One-dimensional spinel ferrite A prepared by electroless plating x B 1-x Fe 2 o 4 method, including the following steps:

[0067] (1) Add 1g γ-Fe 2 o 3 The powder was added to a sensitization solution prepared by 2.3g of stannous chloride, 5ml of hydrochloric acid and 95ml of deionized water, stirred at room temperature for 30min, allowed to stand, filtered with suction, and washed with deionized water.

[0068] (2) The cleaned γ-Fe 2 o 3 The powder was added to the fresh silver-ammonia solution prepared by 0.5g silver nitrate, a small amount of ammonia water and 50ml deionized water, stirred for 2 hours, then stood still, suction filtered, washed with deionized water, and dried at 70°C for 3 hours.

[0069] (3) Take the dried γ-Fe 2 o 3 Put the powder into an electroless plating solution consisting of 2g nickel sulfate, 2g sodium hypophosphite, 2g sodium citrate, 2g ammonium sulfate and 100ml deionized water, adjust the pH of the plating solution to 9, and che...

Embodiment 2

[0074] One-dimensional spinel ferrite A prepared by electroless plating x B 1-x Fe 2 o 4 method, including the following steps:

[0075] Prepare nickel ferrite according to the steps described in Example 1, the different conditions are that the raw material γ-Fe 2 o 3 Change to α-FeOOH.

[0076] The microscopic morphology of nickel ferrite prepared by α-FeOOH electroless plating is rod-like. The particle length is 0.6-1μm, the particle diameter is 100-200nm, and the aspect ratio is 5-15; and its Ms is 36.46emu / g, Mr is 12.05 emu / g, and Hc is 134Oe.

[0077] Compared with Example 1, this example shows that by changing the type of raw materials, a spinel-type nickel ferrite with an obvious one-dimensional shape can also be prepared; in addition, the particle length of the prepared nickel ferrite can also be adjusted. Diameter ratio and magnetic properties can be adjusted.

Embodiment 3

[0079] One-dimensional spinel ferrite A prepared by electroless plating x B 1-x Fe 2 o 4 method, including the following steps:

[0080] The preparatory steps before electroless plating were carried out as described in steps (1)-(2) of Example 1.

[0081] (3) Add γ-Fe 2 o 3 Put the powder into an electroless plating solution consisting of 2g nickel sulfate, 2g sodium hypophosphite, 2g sodium citrate, 2g ammonium sulfate and 100ml deionized water, adjust the pH of the plating solution to 9, and carry out at a temperature of 90°C Electroless nickel plating was performed for 15 minutes. After the plating was finished, it was washed with deionized water and dried at 70°C for 3 hours.

[0082] (4) Take the dried γ-Fe 2 o 3 Put the powder into an electroless plating solution consisting of 3g cobalt sulfate, 2g sodium hypophosphite, 3g sodium citrate, 5g ammonium sulfate and 100ml deionized water, adjust the pH of the plating solution to 9, and carry out at a temperature of 9...

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Abstract

The invention discloses a method for preparing one-dimensional spinel type ferrite AxB1-xFe2O4 through chemical plating. The method is characterized by comprising the following steps of: coating a layer of metal or alloy on the surface of one-dimensional iron oxide through chemical plating, and thus obtaining the spinel type ferrite AxB1-xFe2O4 by a high-temperature roasting process, wherein A and B are Ni, Co, Cu or Zn, and x is more than or equal to 0 and less than or equal to 1; and the one-dimensional iron oxide is alpha-FeOOH, gamma-FeOOH, alpha-Fe2O3 or gamma-Fe2O3 which has a needle-shaped or stick-shaped system, and the length-diameter ratio of particles of the one-dimensional iron oxide is more than or equal to 5. The method is short in reaction time, low in cost and high in quality.

Description

technical field [0001] The present invention relates to a method for preparing one-dimensional spinel ferrite by electroless plating of iron oxide, specifically, in α-FeOOH, γ-FeOOH, α-Fe 2 o 3 or γ-Fe 2 o 3 Electroless plating is performed on the surface of iron oxide, and one-dimensional spinel ferrite is obtained after high-temperature roasting. Background technique [0002] The crystal structure of spinel ferrite belongs to the cubic crystal system. Its chemical formula is MFe 2 o 4 , where M is Ni 2+ ,Co 2+ , Cu 2+ , Zn 2+ ...and other divalent metal ions. The structure and chemical composition characteristics of spinel structure ferrite make it have strong magnetism, certain dielectric properties, excellent mechanical properties, high strength and corrosion resistance, and good chemical stability, and can be used in Many fields, mainly including microwave-absorbing materials, medical treatment, catalysis, etc. [0003] At present, there are many preparation...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C23C18/42C23C18/18C30B29/16C30B29/62C04B35/628
Inventor 孙杰孟锦宏王文举曹晓辉
Owner 深圳凯纳方科技有限公司
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