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Method for preparing structural type wave-absorbing material

A wave-absorbing material and structure-type technology, which is applied in the field of preparing structure-type wave-absorbing materials, achieves the effect of wide wave-absorbing frequency band, low equipment requirements, and simple preparation process

Inactive Publication Date: 2015-07-29
DALIAN UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0005] Although some progress has been made in the research on the properties and application of coal liquefaction residues, how to effectively utilize these valuable coal liquefaction wastes and make them produce greater economic benefits is still a rich concern of scientists and entrepreneurs. challenging questions

Method used

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  • Method for preparing structural type wave-absorbing material
  • Method for preparing structural type wave-absorbing material
  • Method for preparing structural type wave-absorbing material

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0018] Weigh 100g of coal liquefaction residue, 10g of nickel nitrate, 4g of iodine and 300g of tetrahydrofuran in a beaker, and stir for 10 minutes; soak a 30cm×15cm×10cm polyurethane foam in the solution and take it out, use filter paper to repeatedly squeeze, and then squeeze The polyurethane foam with the solution was dried in the air for 15 minutes; the dried polyurethane foam was placed in a muffle furnace for oxidative curing, the temperature was raised from room temperature to 300 °C at a rate of 1 °C / min, kept at a constant temperature for 60 min, and cooled naturally to room temperature; in addition, during the oxidation curing process, it is necessary to add high-temperature resistant and low-density thin plates on both sides of the polyurethane foam for fixing to prevent the polyurethane foam from bending; then cut the polyurethane foam after oxidation and curing into 15cm×22cm Carry out heating and carbonization treatment in a muffle furnace. Under the protection o...

Embodiment 2

[0020]Weigh 80g of coal liquefaction residue, 5g of ferric acetate, 2g of bromine and 250g of tetrahydrofuran in a beaker, and stir for 15 minutes; soak 30cm×15cm×0.8cm polyurethane foam in the solution and take it out, use filter paper to repeatedly squeeze, and then squeeze Finally, the polyurethane foam with the solution was dried in the air for 25 minutes; the dried polyurethane foam was placed in a muffle furnace for oxidative curing. Cool to room temperature; in addition, during the oxidation curing process, it is necessary to add high-temperature resistant and low-density thin plates on both sides of the polyurethane foam for fixing to prevent the polyurethane foam from bending; then cut the polyurethane foam after oxidation and curing into 10cm×20cm Carry out heating and carbonization treatment in a muffle furnace. Under the protection of argon, the temperature is raised from room temperature to 800 °C at a heating rate of 1 °C / min, kept at a constant temperature for 30...

Embodiment 3

[0022] Weigh 10g of coal liquefaction residue, 0.25g of zinc nitrate, 1g of iodine, and 50g of tetrahydrofuran in a beaker, and stir for 5 minutes; soak 3cm×15cm×1.5cm polyurethane foam in the solution and take it out. After pressing, the polyurethane foam with the solution was dried in the air for 10 minutes; the dried polyurethane foam was placed in a muffle furnace for oxidative curing, and the temperature was raised from room temperature to 250 °C at a rate of 5.0 °C / min, and kept at a constant temperature for 30 min. Naturally cool to room temperature; in addition, during the oxidation curing process, it is necessary to add high-temperature resistant, low-density thin plates on both sides of the polyurethane foam for fixing to prevent the polyurethane foam from bending; then cut the polyurethane foam after oxidation and curing into 15cm×22cm Put it in a muffle furnace for heating and carbonization treatment. Under the protection of argon, the temperature is raised from roo...

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Abstract

The invention relates to the technical fields of inorganic non-metallic material science and technology, branched carbon material science and technology and wave-absorbing materials. According to the method for preparing the structural type wave-absorbing material, the structural type wave-absorbing material is prepared with direct coal liquefaction residues as a carbon source and metal salt and halogen-family elementary substances as auxiliary agents. The method has the advantages as follows: (1), a preparation process is simple, the requirement for equipment is not high, process parameters are easy to control, and enlarging or shrinking can be performed as required; (2), raw materials used for preparation are wastes of the coal liquefaction process, are low is cost, do not require secondary treatment and can be directly applied, the utilization value of the raw materials is increased, and the economic benefits are increased; (3), the prepared material has the advantages of wide wave-absorption frequency band, high absorption strength, broad application field and the like.

Description

technical field [0001] The invention relates to a method for preparing structural wave-absorbing materials, and belongs to the technical fields of carbon material science and technology and wave-absorbing materials, branches of inorganic non-metallic material science and technology. Background technique [0002] With the advancement of science and technology, electronic technology, information technology, military technology and equipment have developed rapidly by leaps and bounds, and electromagnetic wave technology has continuously made breakthroughs and progress, which has brought great benefits to the development of human society and played an important role in the fields of detection, positioning, and communication. irreplaceable role. However, with the continuous expansion of electromagnetic wave application fields, the harm caused by its negative interference has gradually attracted people's attention. The deteriorating electromagnetic environment will produce electr...

Claims

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Application Information

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IPC IPC(8): C09K3/00
Inventor 邱介山肖南王帅周颖
Owner DALIAN UNIV OF TECH
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