La-Al-TiN/h-BN nanosheet composite wave-absorbing material and preparation method thereof

A composite wave-absorbing material and nanosheet technology, which is applied in chemical instruments and methods, and other chemical processes, can solve problems such as low wave-absorbing intensity, low absorption bandwidth, and poor wave-absorbing performance

Inactive Publication Date: 2020-12-25
陈淼荣
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Aiming at the technical defects of poor absorbing performance, low absorbing intensity and low absorbing bandwidth of existing medium-absorbing materials, the present invention provides a La-Al-TiN / h-BN nanosheet composite absorbing material and its preparation method

Method used

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  • La-Al-TiN/h-BN nanosheet composite wave-absorbing material and preparation method thereof
  • La-Al-TiN/h-BN nanosheet composite wave-absorbing material and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0025] Step 1: Add 1.86g of boric acid into a mixture of 23.3ml of ethanol and 23.3ml of deionized water, add 18.1g of urea into the solution after ultrasonication for 5min, then stir in a water bath at 50°C for 3h, then put the mixed solution in a 70 The white precursor was obtained in a vacuum drying oven at ℃ for 24 hours; then the precursor was spread in a quartz boat, and the quartz boat was placed in a tube furnace, and the temperature was slowly raised to 900℃ in an ammonia atmosphere, kept for 4 hours and then cooled naturally to room temperature to prepare h-BN nanosheets.

[0026] Step 2: Add 0.62g of TiO 2 Add the h-BN nanosheets prepared in step 1 to 77.5ml of sodium hydroxide solution with a concentration of 0.4g / ml. After ultrasonication for 30min, put the mixed solution into the reaction kettle to react for 36h at a temperature of 110°C. After the reaction, use a deionized Centrifuge and wash with water until the pH value of the solution is below 9, then soak t...

Embodiment 2

[0029] Step 1: Add 2.79g of boric acid into a mixture of 46.5ml of ethanol and 23.3ml of deionized water, add 18.9g of urea into the solution after ultrasonication for 6min, then stir in a water bath at 60°C for 2h, then put the mixed solution in a 75 The white precursor was obtained in a vacuum oven at ℃ for 20 hours; then the precursor was spread on a quartz boat, and the quartz boat was placed in a tube furnace, and the temperature was slowly raised to 900℃ in an ammonia atmosphere, kept for 4 hours and then cooled naturally to room temperature to prepare h-BN nanosheets.

[0030] Step 2: Add 0.75g of TiO 2Add the h-BN nanosheets prepared in step 1 to 75.4ml of sodium hydroxide solution with a concentration of 0.4g / ml. After ultrasonication for 40min, put the mixed solution into the reaction kettle to react at 120°C for 24h. After the reaction, use deionized Centrifuge washing with water until the pH value of the solution is below 9, then soak the solid sample in hydrochlo...

Embodiment 3

[0033] Step 1: Add 2.15g of boric acid into a mixture of 32.3ml of ethanol and 21.5ml of deionized water, add 17.2g of urea into the solution after ultrasonication for 8min, then stir in a water bath at 55°C for 2h, then put the mixed solution in 72 The white precursor was obtained in a vacuum drying oven at ℃ for 23 hours; then the precursor was spread in a quartz boat, and the quartz boat was placed in a tube furnace, and the temperature was slowly raised to 900℃ in an ammonia atmosphere, kept for 5 hours and then cooled naturally to room temperature to prepare h-BN nanosheets.

[0034] Step 2: Add 0.69g of TiO 2 Add the h-BN nanosheets prepared in step 1 to 72.5ml of sodium hydroxide solution with a concentration of 0.4g / ml, and after ultrasonication for 35min, put the mixed solution into the reaction kettle to react at 123°C for 32h. After the reaction, use deionized Centrifuge washing with water until the pH value of the solution is below 9, then soak the solid sample in...

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Abstract

The invention belongs to the technical field of composite material preparation, and particularly relates to a LaAlTiN / hBN nanosheet composite wave-absorbing material and a preparation method thereof.The preparation method comprises the steps that hBN nanosheets are prepared from boric acid and urea, then H2Ti2O4 (OH) 2 is prepared on hBN with TiO2 as a titanium source, and the composite wave-absorbing material is obtained; and finally, mixing La(NO3)3*6 H2O, Al(NO3)3*6 H2O and H2Ti2O4 (OH)2 / hBN, adding ammonia water, and calcining in an ammonia atmosphere to obtain the LaAlTiN / hBN nanosheet composite wave-absorbing material. The composite wave-absorbing material is good in wave-absorbing performance, high in wave-absorbing strength and wide in absorbing bandwidth.

Description

technical field [0001] The invention belongs to the technical field of composite material preparation, and in particular relates to a La-Al-TiN / h-BN nanosheet composite wave-absorbing material and a preparation method thereof. Background technique [0002] With the rapid development of modern science and technology, the wide application of various electronic devices in communication, aerospace and daily life has provided great convenience to human life, but it has also made problems such as electromagnetic interference and pollution increasingly prominent. In order to achieve the purpose of protecting human health and enhancing communication security, there is a strong demand for wave-absorbing materials, and wave-absorbing materials attenuate the electromagnetic wave energy projected on its surface in a certain way, and convert it into other forms of energy. A material that makes electromagnetic waves disappear. [0003] The loss mechanism of absorbing materials for electr...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00
CPCC09K3/00
Inventor 陈淼荣
Owner 陈淼荣
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