Silicon-containing wave-absorbing material preparation method

A technology of wave-absorbing materials and technical solutions, which is applied in chemical instruments and methods, electrical components, and other chemical processes, etc., can solve problems that are difficult to meet processing and complex and diverse use environments, poor corrosion resistance and acid resistance, and limit absorption Wave agent application and other issues, to achieve the effect of increasing anisotropy, improving stability, and improving dielectric loss

Active Publication Date: 2018-08-17
义乌市诠铈新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] Most of the absorbing materials prepared by the above inventions and existing technologies are metal oxides. Due to their poor corrosion resistance and acid resistance, it is difficult to meet the requirements of processing and complex and diverse use environments, which greatly limits this type of absorbing materials. agent application

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0020] A method for preparing a silicon-containing wave-absorbing material, the synthesis technical scheme is as follows:

[0021] step 1

[0022] According to the mass fraction, 4g of cobalt chloride, 24g of ferric chloride, and 8g of ferrous chloride solid powder are added to 150g of water, and under the protection of nitrogen, stir and heat up to 75°C; in addition, take 60g of citric acid Add it into the reaction kettle and stir to dissolve, then add alkali to adjust the pH value = 7, keep stirring for 30 minutes to ensure the formation of a gel, continue to react at 85-90°C for 8 hours, then put the gel in an oven at 105-110°C After drying, it was calcined for 4 h in a sintering furnace according to the temperature program, and after cooling with the furnace, it was ground and sieved to obtain a metal oxide magnetic powder; the obtained metal oxide magnetic powder was dispersed in 60 g of distilled water and ultrasonically treated for 30 min before use;

[0023] step 2

...

Embodiment 2

[0027] A method for preparing a silicon-containing wave-absorbing material, the synthesis technical scheme is as follows:

[0028] step 1

[0029] According to the mass fraction, 1g of nickel chloride, 12g of ferric chloride, 4g of ferrous chloride solid powder are added to 100g of water, under the protection of nitrogen, stir and heat up to 70 °C; in addition, take 45g of citric acid Add it into the reaction kettle and stir to dissolve, then add ammonia water to adjust the pH value = 7, keep stirring for 30 minutes to ensure the formation of a gel, continue to react at 80-85°C for 5 hours, then put the gel in an oven at 100-105°C After drying, it was calcined for 2 h in a sintering furnace according to the temperature program, and after cooling with the furnace, it was ground and sieved to obtain a metal oxide magnetic powder; the obtained metal oxide magnetic powder was dispersed in 20 g of distilled water and ultrasonically treated for 10 min before use;

[0030] step 2

...

Embodiment 3

[0034] A method for preparing a silicon-containing wave-absorbing material, the synthesis technical scheme is as follows:

[0035] step 1

[0036] According to the mass fraction, add 2.5g of lithium chloride, 18g of ferric chloride, 6g of ferrous chloride, solid powder into 125g of water, under the protection of nitrogen, stir and heat up to 85°C; in addition, take 54g of lemon Add the acid into the reaction kettle and stir to dissolve, then add alkali to adjust the pH value = 7, keep stirring for 30 minutes to ensure the formation of a gel, and continue to react at 85-90°C for 7 hours, then put the gel in an oven at 105-110°C After medium-drying, it was calcined in the sintering furnace according to the temperature program for 6 h, and after cooling with the furnace, it was ground and sieved to obtain the metal oxide magnetic powder; the obtained metal oxide magnetic powder was dispersed in 40 g of distilled water and ultrasonically treated for 20 min before use;

[0037] st...

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Abstract

The invention relates to the field of wave-absorbing material preparation, in particular to a silicon-containing wave-absorbing material preparation method. The method includes: adding, by mass, 1-4 parts of metallic chloride, 12-24 parts of ferric chloride, 4-8 parts of ferrous chloride and solid powder into 100-150 parts of water, and adopting a gel method to prepare metallic oxide magnetic powder under the protection of nitrogen; adding 100-180 parts of ethyl alcohol into a reaction kettle, heating to 40-45 DEG C, sequentially adding 30-50 parts of water, 40-60 parts of ammonium hydroxide and 10-20 parts of ammonium hydroxide under the condition of mechanical stirring, adding metallic oxide magnetic powder dispersion liquid after reaction for 10-15min under the condition of stirring, and performing reaction to obtain a silicon-containing wave-absorbing material. The wave-absorbing material with a silicon dioxide shell layer is capable of resisting solvent and environmental erosion,particle stability is improved, anisotropism can be effectively improved, and dielectric loss is increased.

Description

technical field [0001] The invention relates to the field of preparation of wave-absorbing materials, in particular to a preparation method of silicon-containing wave-absorbing materials. Background technique [0002] Wave-absorbing materials can convert and consume electromagnetic energy or make electromagnetic waves disappear or weaken due to interference, and deflect targets. They are a branch of electromagnetic shielding materials and become an important part of stealth and protection technology. It can be widely used in aerospace, military target radar stealth, microwave anechoic chamber, electromagnetic compatibility, electronic devices, protection of civil facilities, and shielding of electromagnetic radiation. [0003] CN103834064B discloses a bacterial cellulose / ferrite composite wave-absorbing material and a preparation method thereof. The invention relates to a preparation technology of a wave-absorbing material. Including: Weigh iron salt and dissolve it in eth...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C09K3/00H05K9/00
CPCC09K3/00H05K9/0081
Inventor 王金桢曹东立王萍
Owner 义乌市诠铈新材料有限公司
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