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Self-assembly rod-shaped manganese-zinc ferrite magnetic material and preparation method thereof

A technology of manganese-zinc ferrite and magnetic materials, applied in chemical instruments and methods, iron compounds, inorganic chemistry, etc., can solve the problems of unfriendly environment, complicated process, easy agglomeration of product particles, etc., and it is easy to control the experimental conditions , Uniform particle size distribution and simple process

Inactive Publication Date: 2013-07-24
CHINA UNIV OF GEOSCIENCES (WUHAN)
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] (2) Wet chemical synthesis is usually used, the conditions are relatively sensitive, difficult to control, and the process is complicated
[0008] (3) Due to the addition of organic solvents during the preparation process, the product particles are easy to agglomerate and are not environmentally friendly

Method used

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  • Self-assembly rod-shaped manganese-zinc ferrite magnetic material and preparation method thereof
  • Self-assembly rod-shaped manganese-zinc ferrite magnetic material and preparation method thereof
  • Self-assembly rod-shaped manganese-zinc ferrite magnetic material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0042] The self-assembled rod-shaped manganese-zinc ferrite magnetic material provided in this embodiment is self-assembled into submicron rods by octahedral units, and its structural formula is Mn 0.25 Zn 0.75 Fe 2 o 4 The material is obtained by calcining after mixing the reactant and the reaction medium, wherein the reactant at least includes manganese source, zinc source and iron source, and the reaction medium is a chloride salt or a mixture of two chloride salts.

[0043] In this embodiment, manganese source is manganese carbonate, oxide or soluble chloride, sulfate, zinc source is zinc carbonate, oxide or soluble chloride, sulfate, iron source is synthetic Fe 2 o 3 Powder, the reaction medium is sodium chloride, potassium chloride, or a mixture of sodium chloride and potassium chloride.

[0044] Fe in this example 2 o 3 The powder is prepared by solvothermal method, and the specific preparation method is as follows:

[0045] (1) FeCl 3 ·6H 2 O was ground into a...

Embodiment 2

[0058] The self-assembled rod-shaped manganese-zinc ferrite magnetic material provided in this embodiment is self-assembled into submicron rods by octahedral units, and its structural formula is Mn 0.5 Zn 0.5 Fe 2 o 4 , the material is obtained by calcining reactants, wherein the reactants at least include manganese source, zinc source and iron source.

[0059] In this embodiment, manganese source is manganese carbonate, oxide or soluble chloride, sulfate, zinc source is zinc carbonate, oxide or soluble chloride, sulfate, iron source is synthetic Fe 2 o 3 Powder.

[0060] Fe in this example 2 o 3 The powder is prepared by solvothermal method, and the specific preparation method is as follows:

[0061] (1) FeCl 3 ·6H 2 O was ground into a powder, which was then dissolved in deionized water to obtain solution A;

[0062] (2) NH 4 h 2 PO 4 Dissolved in deionized water to obtain solution B;

[0063] (3) Mix solution A and solution B, stir fully with a magnetic stirre...

Embodiment 3

[0074] The self-assembled rod-shaped manganese-zinc ferrite magnetic material provided in this embodiment is self-assembled into submicron rods by octahedral units, and its structural formula is Mn 0.75 Zn 0.25 Fe 2 o 4 The material is obtained by calcining after mixing the reactant and the reaction medium, wherein the reactant at least includes manganese source, zinc source and iron source, and the reaction medium is a chloride salt or a mixture of two chloride salts.

[0075] In this embodiment, manganese source is manganese carbonate, oxide or soluble chloride, sulfate, zinc source is zinc carbonate, oxide or soluble chloride, sulfate, iron source is synthetic Fe 2 o 3 Powder, the reaction medium is sodium chloride, potassium chloride, or a mixture of sodium chloride and potassium chloride.

[0076] Fe in this example 2 o 3 The powder is prepared by a solvothermal method, and the specific preparation method is the same as in Example 1.

[0077] The preparation method...

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Abstract

The invention provides a manganese-zinc ferrite magnetic material with uniform particle size, regular particle morphology, and good dispersion. The material is a self-assembled submicron-level rod assembled by octahedral units, and has a structural formula of MnxZn1-xFe2O4, wherein x is no smaller than 0 and no greater than 1. In a reactant, a molar ratio of the elements are that (Mn+Zn) / Fe=1:2. Reaction medium mass / reactant total mass=0-6:1. The invention also provides a process for preparing the material. In the reaction process of the method, molten salt exists among produced manganese-zinc ferrite particles, such that particle agglomeration can be prevented. With the method provided by the invention, stoichiometric ratio of the components can be precisely controlled. The method also has the advantages of simple process, high-purity product, controllable particle morphology, no need of mechanical ball milling, no doping, narrow particle size distribution, wide raw material source, and the like.

Description

technical field [0001] The invention relates to a spinel-type manganese-zinc ferrite magnetic material and a preparation process thereof, in particular to a spinel-type ferrite with a self-assembled rod-like microscopic appearance and a preparation process thereof. Background technique [0002] MnZn spinel ferrite is widely used in the fields of electronic devices, information storage and magnetic resonance imaging (MRI) to manufacture inductors, transformers and deflection coils due to its large resistivity, low power consumption and high magnetic permeability. The key to MnZn ferrite production technology lies in the powder production process and sintering process, and the powder preparation is particularly important. The currently commonly used pulverizing process is the oxide method (such as B. Skoyszewska, W. Tokarz, K. Przybylski. Physica C, 2003, (387): 290–294.), which uses high-purity Fe 2 o 3 , Mn 3 o 4 And ZnO, through batching, mixing, pre-calcination, coarse...

Claims

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Application Information

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IPC IPC(8): C01G49/00C04B35/26
Inventor 栗海峰罗学维沈旭根袁惠吴星许清强叶婷陈康刘金萍
Owner CHINA UNIV OF GEOSCIENCES (WUHAN)
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