CN102153155A - Method for preparing spinel NiFe2O4 nano powder - Google Patents

Method for preparing spinel NiFe2O4 nano powder Download PDF

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Publication number
CN102153155A
CN102153155A CN2010102423017A CN201010242301A CN102153155A CN 102153155 A CN102153155 A CN 102153155A CN 2010102423017 A CN2010102423017 A CN 2010102423017A CN 201010242301 A CN201010242301 A CN 201010242301A CN 102153155 A CN102153155 A CN 102153155A
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powder
nife
solution
mixed solution
room temperature
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CN2010102423017A
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Chinese (zh)
Inventor
冯旺军
成金娟
时均增
张爽
耿丹
李翠环
陈映杉
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Lanzhou University of Technology
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Lanzhou University of Technology
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Priority to CN2010102423017A priority Critical patent/CN102153155A/en
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Abstract

The invention relates to a method for preparing spinel NiFe2O4 nano powder, which comprises the following steps of: dissolving Ni(NO3)2 6H2O(AR) and Fe(NO3)3 9H2O(AR) into deionized water in a ratio of nNi to nFe of 1:2, wherein the concentration of mixed solution is 1mol/L; adding a right amount of polyethylene glycol into the solution and dropwise adding ammonia so that a pH value of the solution is kept in the range of about 3; then adding a certain amount of active carbon into the mixed solution, magnetically stirring the obtained mixed solution for 2 hours at the room temperature, carrying out water bath drying on the mixture at a temperature of 95 DEG C, and carrying out alcohol wet grinding on the dried powder in agates to obtain precursor powder of NiFe2O4; and finally igniting the precursor powder by alcohol to carry out spontaneous combustion, so as to obtain a target product.

Description

Spinel NiFe＜sub〉2＜/sub〉O＜sub〉4＜/sub〉preparation method of nanometer powder
Technical field
The present invention relates to the nano powder preparation technology.
Background technology
Spinel type ferrite has a wide range of applications at aspects such as electron device, microwave technology, mutual inductance device, magnetic core bearing, magnetic recording, magnetic fluids owing to its good electromagnetic performance.Therefore, for NiFe 2O 4Nano-powder synthetic caused to be paid close attention to widely and has developed many preparation methods.Wherein physical method mainly is the mechanical ball milling method, and chemical process mainly contains: sol-gel method, hydrothermal synthesis method, coprecipitation method, self-spread synthesizing method and microemulsion method.Though these methods can be prepared the nanoparticle of excellent property, the process complexity, raw material is expensive and be easy to generate a large amount of pollution gas.
Summary of the invention
The purpose of this invention is to provide a kind of spinelle NiFe 2O 4The preparation method of nanometer powder.
The present invention is spinel NiFe 2O 4The preparation method of nanometer powder the steps include: at room temperature with Ni (NO 3) 26H 2O (AR), Fe (NO 3) 39H 2O (AR) presses n Ni: n FeBe dissolved in deionized water at=1: 2, and the concentration of mixed solution is 1mol/L, add an amount of polyoxyethylene glycol in solution, and dropping ammonia remains on about 3 the pH value of solution; Add a certain amount of gac again in mixed solution, the room temperature magnetic stirs after 2 hours mixture at 95 ℃ of following drying with water baths, with the alcohol wet-milling in agate of dried powder, just obtains NiFe then 2O 4Forerunner's powder; To drive powder at last and ignite with alcohol and carry out auto-combustion, just obtain target product.
The present invention prepares NiFe 2O 4The hysteresis curve that nanometer powder is at room temperature measured shows, the NiFe of the present invention's preparation 2O 4The specific saturation magnetization of nanometer powder is than the NiFe of block 2O 4Low 55emu/g, NiFe 2O 4Degree of crystallinity fine, sample particle is uniformly dispersed, big or small homogeneous, its size is about 20nm, and sample reunite little, decentralization is high.
Description of drawings
Fig. 1 is the XRD collection of illustrative plates of the sample for preparing of the present invention, and Fig. 2 is NiFe 2O 4The SEM photo of powder, Fig. 2 .NiFe 2O 4The SEM figure of nano particle, Fig. 3 is NiFe 2O 4The TEM collection of illustrative plates of nanometer powder, the hysteresis curve that Fig. 4 at room temperature measures for the nanometer powder of the present invention's preparation.
Embodiment
The present invention is spinel NiFe 2O 4The preparation method of nanometer powder the steps include: at room temperature with Ni (NO 3) 26H 2O (AR), Fe (NO 3) 39H 2O (AR) presses n Ni: n FeBe dissolved in deionized water at=1: 2, and the concentration of mixed solution is 1mol/L, add an amount of polyoxyethylene glycol in solution, and dropping ammonia remains on about 3 the pH value of solution; Add a certain amount of gac again in mixed solution, the room temperature magnetic stirs after 2 hours mixture at 95 ℃ of following drying with water baths, with the alcohol wet-milling in agate of dried powder, just obtains NiFe then 2O 4Forerunner's powder; To drive powder at last and ignite with alcohol and carry out auto-combustion, just obtain target product.
As shown in Figure 1, be the XRD collection of illustrative plates of the sample for preparing of the present invention, the lattice paprmeter of product: a=8.337, b=8.337, c=8.337, Spinel NiFe 2O 4Main diffraction maximum all occur and very sharp-pointed, show NiFe 2O 4Degree of crystallinity fine.Fig. 2 is NiFe 2O 4The SEM photo of powder, as seen from Figure 2, sample particle is uniformly dispersed, big or small homogeneous, and its size is about 20nm, and the sample reunion is little, decentralization is high.Fig. 3 is NiFe 2O 4The TEM collection of illustrative plates of nanometer powder is schemed as can be known thus, the NiFe of preparation method's preparation of the present invention 2O 4Nano particle is spherical, and granular size is about 20nm.Fig. 4 is the NiFe of the present invention's preparation 2O 4The hysteresis curve that nanometer powder is at room temperature measured, figure as can be known thus: NiFe 2O 4Nanometer powder at room temperature presents weak ferromagnetism, and its specific saturation magnetization is 25.3emu/g, and remanent magnetization is 5.1emu/g, and coercivity is 150.45Oe.The NiFe of the present invention's preparation 2O 4The specific saturation magnetization of nanometer powder is than the NiFe of block 2O 4Low 55emu/g.

Claims (2)

1. spinel NiFe 2O 4The preparation method of nanometer powder the steps include: at room temperature with Ni (NO 3) 26H 2O (AR), Fe (NO 3) 39H 2O (AR) presses n Ni: n FeBe dissolved in deionized water at=1: 2, and the concentration of mixed solution is 1mol/L, add an amount of polyoxyethylene glycol in solution, and dropping ammonia remains on about 3 the pH value of solution; Add a certain amount of gac again in mixed solution, the room temperature magnetic stirs after 2 hours mixture at 95 ℃ of following drying with water baths, with the alcohol wet-milling in agate of dried powder, just obtains NiFe then 2O 4Forerunner's powder; To drive powder at last and ignite with alcohol and carry out auto-combustion, just obtain target product.
2. spinelle NiFe according to claim 1 2O 4The preparation method of nanometer powder is characterized in that spinel-type NiFe 2O 4Powder is the spheric granules of diameter about 15 ± 5nm, NiFe 2O 4At room temperature be weak ferromagnetism, specific saturation magnetization is that 25.3emu/g, coercivity are that 150.45Oe, remanent magnetization are 5.1emu/g.
CN2010102423017A 2010-07-29 2010-07-29 Method for preparing spinel NiFe2O4 nano powder Pending CN102153155A (en)

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Cited By (3)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105177517A (en) * 2015-09-23 2015-12-23 南京理工大学 Nanometer thermite and preparing method thereof
CN105502286A (en) * 2016-01-04 2016-04-20 南京林业大学 Preparation method of porous nano NiFe2O4
CN108298978A (en) * 2018-03-29 2018-07-20 太原理工大学 A kind of method that sol-gel method prepares CaCu 3 Ti 4 O/nickel ferrite based magnetic loaded compound magnetoelectric ceramic material

Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN105177517A (en) * 2015-09-23 2015-12-23 南京理工大学 Nanometer thermite and preparing method thereof
CN105502286A (en) * 2016-01-04 2016-04-20 南京林业大学 Preparation method of porous nano NiFe2O4
CN105502286B (en) * 2016-01-04 2018-05-15 南京林业大学 A kind of porous nano NiFe2O4Preparation method
CN108298978A (en) * 2018-03-29 2018-07-20 太原理工大学 A kind of method that sol-gel method prepares CaCu 3 Ti 4 O/nickel ferrite based magnetic loaded compound magnetoelectric ceramic material

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Application publication date: 20110817