Nickel zinc copper ferrite wave-absorbing material and preparation method thereof

A wave-absorbing material and ferrite technology, which is applied in the fields of magnetism of inorganic materials, chemical instruments and methods, and other chemical processes, can solve the problems of high sintering temperature, short sintering time, and low sintering temperature, and achieve low synthesis temperature, The effect of delaying hard agglomeration and large specific surface area

Inactive Publication Date: 2009-01-14
ZHEJIANG NORMAL UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0008] The purpose of the present invention is to provide a ferrite absorbing material and preparation method for the shortcomings of narrow absorption frequency band, large product particles, high sintering temperature, long sintering time, an

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] Weigh 4mmol Ni(NO 3 ) 2 ·6H 2 O, 5mmol Zn(NO 3 ) 2 ·6H 2 O, 1mmol Cu(NO 3 ) 2 ·6H 2 O, 20mmolFe(NO 3 ) 2 9H 2 O and 40mmol citric acid (C 6 h 8 o 7 ·H 2 0), after mixing, grind evenly, add an appropriate amount of mixed solvent variants (deionized water and absolute ethanol are mixed in a volume ratio of 1: 1) to modulate rheological variants; In a stainless steel reaction kettle, put it into an ultrasonic oscillator at 60-80°C for 15-20 hours (ultrasonic conditions: use power 100W, frequency 50KHz, intermittent ultrasonic cycle 30min.), then cool to 25°C, suction filter, respectively The solid phase is washed 2-3 times with deionized water and absolute ethanol, and dried at 80-120° C. for 4-8 hours to obtain the organic acid salt precursor. Add 0.2-0.4wt% trimanganese tetroxide to the precursor, pre-calcine in a muffle furnace at 400-600°C for 0.5-2 hours, and then bake at 700-1200°C for 1-3 hours; the nickel-zinc-copper ferrite is obtained Nano powder....

Embodiment 2

[0021] Weigh 3mmol Ni(NO 3 ) 2 ·6H 2 O, 5mmol Zn(NO 3 ) 2 ·6H 2 O, 2mmol Cu(NO 3 ) 2 ·6H 2 O, 20mmolFe(NO 3 ) 2 9H 2 O and 40mmol citric acid (C 6 h 8 o 7 ·H 2 0), mixed and ground evenly, adding an appropriate amount of mixed solvent variants (deionized water and absolute ethanol mixed in a volume ratio of 1:1) to modulate rheological variants; the rest of the steps are the same as in Example 1. Its chemical composition was determined to be the same as that of Ni 0.3 Zn 0.5 Cu 0.2 Fe 2 o 4 match.

Embodiment 3

[0023] Weigh 2mmol Ni(NO 3 ) 2 ·6H 2 O, 5mmol Zn(NO 3 ) 2 ·6H 2 O, 3mmol Cu(NO 3 ) 2 ·6H 2 O, 20mmolFe(NO 3 ) 2 9H 2 O and 40mmol citric acid (C 6 h 8 o 7 ·H 2 0), mixed and ground evenly, adding an appropriate amount of mixed solvent variants (deionized water and absolute ethanol mixed in a volume ratio of 1:1) to modulate rheological variants; the rest of the steps are the same as in Example 1. Its chemical composition was determined to be the same as that of Ni 0.2 Zn0.5 Cu 0.3 Fe 2 o 4 match.

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Abstract

The invention provides a nickel-zinc-copper ferrite absorbing material and a preparation method used for the absorbing material. The invention aims at overcoming the shortages of the existing ferrite absorbing material and the preparation method thereof which have narrow absorbing frequency range, large grain, high sintering temperature and large energy dissipation of the product, and provides the nickel-zinc-copper ferrite absorbing material and the preparation method thereof which have wide absorbing frequency range, small grain, low sintering temperature and low energy dissipation of the product. The preparation method of the invention comprises the steps that nitrate or chloride or sulphate is adopted as raw material; one of salicylic acid, citric acid, malic acid and tartaric acid is adopted as an intercalating agent; after the material and the intercalating agent are weighed according to proportion, mixed and uniformly groud, ethanol solvent with suitable quantity is added into the intercalating agent so as to prepare rheid which is injected into a reaction kettle and reacted under ultrasonic conditions; subsequently, the solid matter is cooled, filtrated, washed by water and washed by ethanol, and dried so as to obtain organic acid salt precursor; Mn3O4 is added into the precursor and the nickel-zinc-copper ferrite nanometer powder is obtained by sintering.

Description

technical field [0001] The invention belongs to the technical field of magnetic materials, in particular to a nickel-zinc-copper ferrite wave-absorbing material with an anti-electromagnetic interference function and a preparation method thereof. Background technique [0002] Ferrite is a metal composite oxide with ferromagnetism. In terms of its electromagnetic properties, the resistivity of ferrite is much larger than that of metal and alloy magnetic materials, and it also has high dielectric properties. It can also show high magnetic permeability at high frequencies. Therefore, ferrite has become a widely used non-metallic magnetic material in the field of high frequency and weak current, and is one of the important pillar products of electronics, electromechanical industry and information industry. Its promotion and application directly affect electronic information, home appliance industry, computer and communication , the development of environmental protection and ene...

Claims

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Application Information

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IPC IPC(8): H01F1/10C04B35/26C04B35/622C22C38/00C09K3/00
Inventor 李良超徐烽刘徽王育萍仇海珍向晨
Owner ZHEJIANG NORMAL UNIVERSITY
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