Accordion-shaped NiCo2O4 wave-absorbing material and preparation method thereof

A wave-absorbing material and accordion technology, applied in chemical instruments and methods, inorganic chemistry, nickel compounds, etc., can solve the problems of high cost and cumbersome preparation process, and achieve small thickness, cheap and easy-to-obtain raw materials, and strong controllability Effect

Active Publication Date: 2021-03-16
NORTHWESTERN POLYTECHNICAL UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

CN110272719A, CN107177053A, CN107244877A, CN107177053B, CN107244877B etc. respectively disclose the preparation method of nickel cobalt oxide composite wave-absorbing material, but there are problems such as complicated preparation process and high cost

Method used

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  • Accordion-shaped NiCo2O4 wave-absorbing material and preparation method thereof
  • Accordion-shaped NiCo2O4 wave-absorbing material and preparation method thereof
  • Accordion-shaped NiCo2O4 wave-absorbing material and preparation method thereof

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Experimental program
Comparison scheme
Effect test

Embodiment 1

[0032] Accurately weigh 0.1426g NiCl according to the stoichiometric ratio 2 ·6H 2 O and 0.2855 g CoCl 2 ·6H 2 O, added to 60mL of deionized water; another accurately weighed 0.3528g sodium oxalate was added to the above solution, stirred rapidly for 10min to make it a homogeneous liquid; sequentially added 0.1621g anhydrous glucose and 0.1462g urea, stirred at high speed for 30min; The above solution was transferred to a stainless steel reactor, and the temperature was raised to 220°C for 10 hours; after the reaction, it was naturally cooled to room temperature, filtered, washed, and dried to obtain the precursor of the wave-absorbing material; finally, it was calcined at 400°C for 2 hours to obtain an accordion-shaped NiCo 2 o 4 Absorbing material.

[0033] figure 1 S1 is the X-ray diffraction pattern of the prepared sample. All the diffraction peaks are sharp and consistent with the spinel NiCo 2 o 4 (JCPDS No.20-0718) is consistent, indicating that NiCo 2 o 4 The...

Embodiment 2

[0036] Accurately weigh 0.1426g NiCl according to the stoichiometric ratio 2 ·6H 2 O and 0.2855 g CoCl 2 ·6H 2 O, added to 60mL of deionized water; another 1.1790g of sodium sulfosalicylate was accurately weighed and added to the above solution, and stirred rapidly for 10min to make it a homogeneous liquid; sequentially added 0.9720g of anhydrous glucose and 0.38mL of ammonia water, and Stir for 30 minutes; transfer the above solution to a stainless steel reactor, raise the temperature to 40°C for 24 hours; after the reaction, naturally cool to room temperature, suction filter, wash, and dry to obtain the precursor of the wave-absorbing material; finally calcinate at 600°C for 0.5h, Accordion-shaped NiCo 2 o 4 Absorbing material.

[0037] figure 1 S2 is the X-ray diffraction pattern of the prepared sample.

[0038] Figure 4 It is the scanning electron microscope picture of the synthetic wave-absorbing material of this embodiment, can find out from this figure that NiC...

Embodiment 3

[0040] Accurately weigh 0.1426g NiCl according to the stoichiometric ratio 2 ·6H 2 O and 0.2855 g CoCl 2 ·6H 2 O, added to 60mL of deionized water; another accurate measure of 12μL ethylenediamine was added to the above solution, stirred rapidly for 10min to make it a homogeneous liquid; sequentially added 0.6552g cetyltrimethylammonium bromide and 0.0711g Ammonium bicarbonate, stirred at high speed for 30 minutes; transferred the above solution to a stainless steel reaction kettle, raised the temperature to 220°C and reacted for 10 minutes; naturally cooled to room temperature after the reaction, filtered, washed, and dried to obtain the precursor of the wave-absorbing material; ℃ calcined for 3h to obtain accordion-shaped NiCo 2 o 4 Absorbing material.

[0041] figure 1 S3 is the X-ray diffraction pattern of the prepared sample.

[0042] Figure 5 It is the scanning electron microscope picture of the synthetic wave-absorbing material of this embodiment, can find out ...

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Abstract

The invention belongs to the technical field of inorganic wave-absorbing materials, and discloses a novel accordion-shaped NiCo2O4 wave-absorbing material and a preparation method thereof, and the wave-absorbing material has a special accordion shape and regular morphology. The specific preparation method comprises the following steps: S1, dissolving divalent nickel ion metal salt, divalent cobaltion metal salt and a complexing agent in water to obtain a nickel-cobalt ion complexing solution; S2, adding a template agent and a precipitant into the nickel-cobalt ion complexing solution, performing hydrothermal reaction, cooling, and sequentially filtering, washing and drying to obtain a precursor; and S3, calcining the precursor to obtain the wave-absorbing material. The prepared accordion-shaped NiCo2O4 wave-absorbing material has excellent wave-absorbing performance and has a good application prospect in the field of wave-absorbing materials; the preparation process is simple, raw materials are cheap and easy to obtain, requirements on production equipment are low, and industrial production is easy.

Description

technical field [0001] The invention relates to a method of preparing accordion-shaped NiCo by adding complexing agent 2 o 4 A wave-absorbing material and a preparation method thereof belong to the technical field of inorganic wave-absorbing materials. Background technique [0002] With the development of science and technology, especially the rapid development of wireless equipment and electronic equipment used in industrial and commercial fields, electronic equipment tends to be miniaturized and miniaturized, and the working band tends to be high frequency. Equipment working in the high frequency band is susceptible to electromagnetic wave interference generated by other electronic devices, which will lead to performance degradation or even paralysis of the equipment. In addition, high-frequency electromagnetic waves are harmful to human health. Therefore, with the rapid development of modern high-tech electronic technology and the improvement of people's emphasis on ph...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G53/00
CPCC01G53/00C01P2004/61C01P2004/62C01P2004/30Y02E60/13
Inventor 吴宏景师宾常卿张利民
Owner NORTHWESTERN POLYTECHNICAL UNIV
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