Process for preparing carbon black-loaded cobalt-zinc ferrite wave-absorbing material

A technology of wave absorbing material and process method, applied in metal material coating process, liquid chemical plating, coating and other directions, can solve the problem of easy agglomeration of nano ferrite, and achieve simple preparation process, easy process and easy operation. Effect

Active Publication Date: 2015-12-09
SHENYANG LIGONG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

It can well overcome the problem that nano-ferrite prepared by solvothermal method is easy to agglomerate during the reaction, and the composite effect of the two media improves the wave-absorbing performance of the material

Method used

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  • Process for preparing carbon black-loaded cobalt-zinc ferrite wave-absorbing material
  • Process for preparing carbon black-loaded cobalt-zinc ferrite wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0023] (a), first prepare 1000ml, 10.2% mixed metal salt solution from the following components according to the following weight ratio: zinc nitrate, iron nitrate, cobalt nitrate=0.8:0.2:2 for later use; (b), take the above Put 50ml of the prepared metal salt solution in a small beaker, add conductive carbon black at a ratio of 1:1 by weight, ultrasonically for at least 1 hour to disperse the suspension evenly, then titrate the dispersed suspension with 8% sodium hydroxide , so that the pH value is greater than 10; (c), move all the suspension solution obtained in step (b) into a hydrothermal reaction kettle, and put the reaction kettle into an oven at 220°C for solvothermal reaction, and the reaction time is 8h; ( d) Cool naturally after the solvothermal reaction is completed, filter with Buchner funnel after cooling, wash with deionized water until neutral, and finally dry to obtain the finished product.

Embodiment 2

[0025] (a), first prepare 1000ml, 10.2% mixed metal salt solution from the following components according to the following weight ratio: zinc nitrate, iron nitrate, cobalt nitrate=0.8:0.2:2 for later use; (b), take the above Put 50ml of the prepared metal salt solution in a small beaker, add conductive carbon black at a ratio of 1:1 by weight, ultrasonically for at least 1 hour to disperse the suspension evenly, then titrate the dispersed suspension with 8% sodium hydroxide , so that the pH value is greater than 11; (c), move all the suspension solution obtained in step (b) into a hydrothermal reaction kettle, and put the reaction kettle into an oven at 200°C for solvothermal reaction, and the reaction time is 12h; ( d) Cool naturally after the solvothermal reaction is completed, filter with Buchner funnel after cooling, wash with deionized water until neutral, and finally dry to obtain the finished product.

Embodiment 3

[0027] (a), first prepare 1000ml, 10.2% mixed metal salt solution from the following components according to the following weight ratio: zinc nitrate, iron nitrate, cobalt nitrate=0.8:0.2:2 for later use; (b), take the above Put 50ml of the prepared metal salt solution in a small beaker, add conductive carbon black at a ratio of 1:1 by weight, ultrasonically for at least 1 hour to disperse the suspension evenly, then titrate the dispersed suspension with 8% sodium hydroxide , so that the pH value is greater than 11; (c), move all the suspension solution obtained in step (b) into a hydrothermal reaction kettle, and put the reaction kettle into an oven at 180°C for solvothermal reaction, and the reaction time is 16h; ( d) Cool naturally after the solvothermal reaction is completed, filter with Buchner funnel after cooling, wash with deionized water until neutral, and finally dry to obtain the finished product.

[0028] like figure 1 It is a scanning electron micrograph of the c...

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Abstract

The invention discloses a process method for preparing a carbon-black-loaded cobalt zinc ferrite wave-absorbing material. The process method comprises the following steps: (a) preparing 1000ml of 10.2% mixed metal salt solution for future use; (b) pouring 50ml of the prepared metal salt solution in a small beaker, adding conductive carbon black into the metal salt solution in the small beaker in a ratio of 1:1 in parts by weight, performing ultrasonic treatment for at least 1 hour until a suspension solution disperses evenly, and then titrating the dispersed suspension solution by 8% sodium hydroxide until the pH value is greater than 8; (c) transferring all the suspension solution obtained in the step (b) into a hydrothermal reaction kettle, and placing the reaction kettle in a drying oven at 180-220 DEG C for solvothermal reaction for 8-16 hours; (d) cooling after the solvothermal reaction is ended, leaching by a Buchner funnel after cooling, washing by deionized water until the leached solution is neutral, and finally, drying, thus obtaining the finished product. Through the process method, the problem that nano-ferrite prepared by a solvothermal method is likely to cluster during reaction can be overcome, and meanwhile, the wave-absorbing performance of the material is improved.

Description

technical field [0001] The invention relates to a process for preparing a wave-absorbing material, in particular to a process for preparing a carbon black-loaded cobalt-zinc ferrite wave-absorbing material. Background technique [0002] Absorbing materials have a wide range of civilian uses in electromagnetic shielding such as television broadcasting, microwave anechoic chambers, electronic equipment, and precision instruments. At the same time, there are also urgent needs in military electronic countermeasures, weapon stealth, etc., which further promotes the development of absorbing materials. Research and Development. With the rapid development of science and technology, the requirements of high absorption rate, wide absorption frequency band, light weight and thin thickness have been put forward for the absorbing material. It is difficult for traditional absorbing materials to meet these requirements, and people have begun to develop new absorbing materials such as nano...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C23C18/00
Inventor 刘润清安玉良刘军袁霞
Owner SHENYANG LIGONG UNIV
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