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Process for preparing composite material of carbon nano tube/NiZn ferrite

A nickel-zinc ferrite, carbon nanotube technology, applied in the direction of magnetic materials, metal material coating process, magnetic objects, etc. The effect of good magnetic properties and wide application prospects

Inactive Publication Date: 2006-06-28
DONGHUA UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

However, in the prepared composite material, a large amount of nickel ferrite agglomerates and cannot be completely coated on the carbon nanotubes.
For the preparation of carbon nanotubes / nickel-zinc ferrite composites, there is no report yet

Method used

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  • Process for preparing composite material of carbon nano tube/NiZn ferrite
  • Process for preparing composite material of carbon nano tube/NiZn ferrite
  • Process for preparing composite material of carbon nano tube/NiZn ferrite

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0033] 0.5g of carbon nanotubes and 50ml of concentrated nitric acid mixture were refluxed in an oil bath at 140°C for 4.5 hours to prepare modified carbon nanotubes, and then at room temperature, press Ni 2+ : Zn 2+ : Fe 3+ The molar ratio is 0.75:0.25:2 to weigh Ni(NO 3 ) 2 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, add distilled water, sonicate to dissolve the salt completely, add and Fe 3+The mass ratio is 1:10 modified carbon nanotubes, ultrasonic treatment again to make it uniformly dispersed, and then titrate the above mixture with 5mol / l NaOH solution, stirring with a magnetic stirrer at a speed of 600 rpm during the titration process , when the pH value = 9, the titration is completed, put the reactant in a 100ml hydrothermal kettle at 200°C, react for 8 hours, after the reaction is complete, wait for the system to cool to room temperature, filter the reactant, and use a large amount of distilled water Rinse with ethanol after washing to PH=7, and fu...

Embodiment 2

[0040] 0.5g of carbon nanotubes and 35ml of concentrated nitric acid mixture were refluxed in an oil bath at 150°C for 3 hours to prepare modified carbon nanotubes, and then at room temperature, press Ni 2+ : Zn 2+ : Fe 3+ The molar ratio is 0.5:0.5:2 to weigh Ni(NO 3 ) 2 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, add distilled water, sonicate to dissolve the salt completely, add and Fe 3+ The mass ratio of modified carbon nanotubes is 1:15, ultrasonic treatment is used to disperse evenly, and then the above mixture is titrated with 4mol / l NaOH solution, and the magnetic stirrer is used to stir at a speed of 800 rpm during the titration process , when the pH value = 9, the titration is completed, put the reactant in a 100ml hydrothermal kettle at 180°C, react for 24 hours, after the reaction is complete, wait for the system to cool to room temperature, filter the reactant, and use a large amount of distilled water to filter the reactant Rinse with ethanol aft...

Embodiment 3

[0042] 0.5g of carbon nanotubes and 75ml of concentrated nitric acid mixture were refluxed in an oil bath at 120°C for 8 hours to prepare modified carbon nanotubes, and then at room temperature, press Ni 2+ : Zn 2+ : Fe 3+ The molar ratio is 0.25:0.75:2 to weigh Ni(NO 3 ) 2 ·6H 2 O, Zn(NO 3 ) 2 ·6H 2 O, Fe(NO 3 ) 3 9H 2 O, add distilled water, sonicate to dissolve the salt completely, add and Fe 3+ The mass ratio of the modified carbon nanotubes is 1:12, and ultrasonic treatment is used to disperse the mixture evenly, and then the above mixture is titrated with 8 mol / l kOH solution. During the titration process, a magnetic stirrer is used to stir at a speed of 400 rpm , when the pH value = 10, the titration is completed, put the reactant in a 100ml hydrothermal kettle at 280°C, react for 3 hours, after the reaction is complete, wait for the system to cool to room temperature, filter the reactant, and use a large amount of distilled water Rinse with ethanol after was...

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Abstract

The invention discloses a carbon nanometer tube / nickel zinc ferrite composite material manufacturing method. It includes the following steps: manufacturing modified carbon nanometer tube by the backflow of the mixture of carbon nanometer tube and aqua fortis in oil bath; weighing solubility Ni2+, Zn2+, Fe3+ salt with curtain quantity relative ratio to add to distilled water to do ultra sonic dispersion at room temperature; adding to modified carbon nanometer tube with 1:10-15 mass ratio to Fe3+ to do ultra sonic dispersion again; using 4-8mol / l strongly alkaline solution to make the pH value bigger than 8; reacting for 3-24h in hot kettle; cooling to room temperature after full reaction; filtering; washing by distilled water until the pH value reaches 7; washing by alcohol; drying at 60-100 centigrade degree for 5-12h. The formed material has good magnetic, dielectric and electrical properties, and has extensive application prospect in high density magnetic recording material field, and son.

Description

technical field [0001] The invention relates to a preparation method of a nano-composite material, in particular to a preparation method of a nano-material carbon nanotube / nickel-zinc ferrite novel one-dimensional magnetic composite material. Background technique [0002] Carbon nanotubes have attracted great attention from scientists for their unique physical and chemical properties. Studies have shown that assembling or modifying carbon nanotubes with inorganic, organic, and biological materials will produce more excellent physical and chemical properties, such as better electrical properties, magnetic properties, mechanical properties, adsorption properties, and wave-absorbing properties. At the same time, carbon nanotubes can also be used as templates to prepare nanotubes and nanowires or one-dimensional composite nanomaterials. These one-dimensional nanomaterials will be important raw materials for next-generation nanodevices. The composite carbon nanotubes will have i...

Claims

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Application Information

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IPC IPC(8): C23C18/31H01F1/147
Inventor 朱美芳曹慧群李耀刚陈彦模
Owner DONGHUA UNIV
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