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Preparation method of nickel-iron-zirconium compound ferrite

A technology of ferrite and nickel-iron, which is applied in the field of preparation of nickel-iron-zirconium composite ferrite, can solve the problems of lack of overall uniformity of materials, difficulty in mixing to a uniform state, etc., and achieve excellent wave-absorbing ability, uniform mixing, The effect of uniform material composition

Inactive Publication Date: 2014-09-24
QINGDAO DONGFANG RECYCLING ENERGY +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] In terms of synthesis method, the synthesis of ferrite is generally made by mixing oxides and directly sintering. The overall uniformity of the material is lacking, and the mixing between the components is not easy to achieve a uniform state.

Method used

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  • Preparation method of nickel-iron-zirconium compound ferrite
  • Preparation method of nickel-iron-zirconium compound ferrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Take nickel nitrate, ferric nitrate and zirconium tetrachloride with a volume of 20mL to prepare a mixed solution, wherein the concentration of nickel nitrate is 0.2mol / L, the concentration of ferric nitrate is 0.5mol / L, and the concentration of tetrachloride is 0.5mol / L. The molar concentration of zirconium oxide is 0.1mol / L, and at an ultrasonic frequency of 40KHz, add 50mL of 1mol / L sodium hydroxide solution dropwise to the mixed solution, let the precipitate stand for 24h, filter, and wash with hot water for 5 times , and then washed 5 times with ethanol, and the obtained solid precipitate was dried in an oven at 80° C. for 8 hours. After taking it out, it is calcined in a tube furnace. During calcination, the temperature rise program is 8°C / min to 400°C, and it is kept for 1h, and then it is raised to the target temperature of 850°C at 2°C / min, and it is kept for 4h. -5Fe 2 o 3 -ZrO 2 Composite ferrite.

Embodiment 2

[0023] Take nickel nitrate, ferric nitrate and zirconium tetrachloride with a volume of 20mL to prepare a mixed solution, wherein the concentration of nickel nitrate is 0.1mol / L, the concentration of ferric nitrate is 0.8mol / L, and the concentration of tetrachloride is 0.8mol / L. The molar concentration of zirconium oxide is 0.1mol / L, and at an ultrasonic frequency of 40KHz, add 60mL of 1mol / L sodium hydroxide solution dropwise to the mixed solution, let the precipitate stand for 24h, filter, and wash with hot water for 5 times , and then washed 5 times with ethanol, and the obtained solid precipitate was dried in an oven at 80° C. for 8 hours. After taking it out, it is calcined in a tube furnace. During calcination, the temperature rise program is 8°C / min to 400°C, and it is kept for 1 hour, and then it is raised to the target temperature of 850°C at 2°C / min, and it is kept for 4 hours. After cooling down, the solid is taken out to obtain NiO-8Fe 2 o 3 -ZrO 2 .

Embodiment 3

[0025] Take nickel nitrate, iron nitrate and zirconium tetrachloride with a volume of 15mL to prepare a mixed solution, wherein the concentration of nickel nitrate is 0.3mol / L, the concentration of iron nitrate is 0.9mol / L, and the concentration of tetrachloride is 0.9mol / L. The molar concentration of zirconium oxide is 0.1mol / L, and at an ultrasonic frequency of 40KHz, add 60mL of 1mol / L sodium hydroxide solution dropwise to the mixed solution, let the precipitate stand for 24h, filter, and wash with hot water for 5 times , and then washed 5 times with ethanol, and the obtained solid precipitate was dried in an oven at 80° C. for 8 hours. After taking it out, it is calcined in a tube furnace. During calcination, the temperature rise program is 8°C / min to 400°C, and it is kept for 1 hour, and then it is raised to the target temperature of 850°C at 2°C / min, and it is kept for 4 hours. After cooling down, the solid is taken out to obtain 3NiO-4.5Fe 2 o 3 -ZrO 2 .

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Abstract

The invention discloses a preparation method of a nickel-iron-zirconium compound ferrite. The preparation method comprises the specific steps of mixing nickel salt, iron salt and zirconium salt solutions together, and then carrying out titration by use of an alkali liquor under an ultrasonic condition for precipitating, and filtering, drying and sintering at a high temperature the precipitate, thereby obtaining the nickel-iron-zirconium compound ferrite. The compound ferrite shows excellent wave absorbing capacity; all the components are mixed more evenly.

Description

technical field [0001] The invention relates to a preparation method of ferrite, in particular to a preparation method of nickel-iron-zirconium composite ferrite. Background technique [0002] Ferrite is sintered from iron oxide and other ingredients, and generally can be divided into three types: permanent ferrite, soft ferrite and gyromagnetic ferrite. Permanent ferrite is also called ferrite magnet, which is the small black magnet we usually see. Soft ferrite is prepared and sintered by ferric oxide and one or several other metal oxides (such as nickel oxide, zinc oxide, manganese oxide, magnesium oxide, barium oxide, strontium oxide, etc.). Gyromagnetic ferrite refers to a ferrite material with gyromagnetic properties. [0003] At present, the most widely used and hottest research is soft ferrite. CN102603278B provides a preparation method of nickel-zinc ferrite, which is prepared by an oxide method and sintered under certain conditions. After sintering, the crystal g...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/622
Inventor 建方方马连湘吴锋李琼
Owner QINGDAO DONGFANG RECYCLING ENERGY
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