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Novel iron-cobalt-based alloy wave-absorbing micro powder and preparation method thereof

An iron-cobalt-based and alloy technology, which is applied in the field of preparation of iron-cobalt-based alloy microwave-absorbing micropowder, can solve the problems of low saturation magnetization, small microwave magnetic permeability, thick matching thickness, etc., and achieve high absorption strength and high frequency absorption Bandwidth, low-cost results

Inactive Publication Date: 2015-11-25
孙炜炜
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the low saturation magnetization of ferrite in the 1-18GHz frequency band, small microwave permeability, poor wave absorption ability, and thick matching thickness (centimeter level), the application of ferrite materials in this frequency band is greatly affected. the limitations of

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0021] Metals Fe, Co, Pr, Al with a purity greater than 99.5% are classified as Fe 10 co 7 PR 1.5 Al 0.5 10g sample raw materials are prepared in atomic proportions, and the prepared raw materials are melted into small alloy ingots in a vacuum electric arc furnace. The melted alloy ingots are put into a quartz glass tube for vacuum sealing, and then the sealed quartz glass tube is put into water for inspection. Its airtightness, after checking that the seal is intact, put it into a box-type resistance furnace, and perform homogenization annealing treatment under the ambient condition of 500°C. After annealing treatment for 15 days, it is quenched in a mixture of ice and water. After cooling, take out the sample for mechanical preliminary crushing, and collect The pulverized powder is poured into a ball mill tank, and under the protection of gasoline, ball milling is carried out with a planetary ball mill. The ball milling speed is controlled at 200r / min. After 70 hours of ba...

Embodiment 2

[0023] Metals Fe, Co, Pr, Al with a purity greater than 99.5% are classified as Fe 10 co 7 PR 1.3 Al 0.7 10g sample raw materials are prepared in atomic proportions, and the prepared raw materials are melted into small alloy ingots in a vacuum electric arc furnace. The melted alloy ingots are put into a quartz glass tube for vacuum sealing, and then the sealed quartz glass tube is put into water for inspection. Its tightness, put it into a box-type resistance furnace after checking that the seal is intact, and perform homogenization annealing treatment at 550 ° C. After annealing treatment for 15 days, quench it in a mixture of ice and water. After cooling, take out the sample for mechanical preliminary crushing, and collect The pulverized powder is poured into a ball mill tank, and under the protection of gasoline, ball milling is carried out with a planetary ball mill. The ball milling speed is controlled at 250r / min. After 60 hours of ball milling, the alloy micropowder i...

Embodiment 3

[0025] Metals Fe, Co, Pr, Al with a purity greater than 99.5% are classified as Fe 10 co 7 The atomic ratio of PrAl is mixed into 20g sample raw materials, and the prepared raw materials are melted into small alloy ingots in a vacuum electric arc furnace. The melted alloy ingots are put into a quartz glass tube for vacuum sealing, and then the sealed quartz glass tube is put into water. Check its tightness, put it into a box-type resistance furnace after checking that the seal is intact, and perform homogenization annealing treatment at 600°C. After annealing treatment for 15 days, quench it in a mixture of ice and water, and take out the sample after cooling for preliminary mechanical crushing. Collect the pulverized powder and pour it into a ball mill tank. Under the protection of gasoline, use a planetary ball mill for ball milling. The ball milling speed is controlled at 300r / min. After 50 hours of ball milling, take out the alloy powder and dry it to get a kind of alloy p...

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Abstract

The invention provides novel iron-cobalt-based alloy wave-absorbing micro powder and a preparation method thereof. The preparation method includes the steps that high-purity metal comprising Fe, Co, Pr and Al serving as raw materials is compounded according to a certain atom ratio and smelted through a vacuum arc furnace; the smelted alloy is placed in a vacuum glass pipe to be subjected to homogenizing annealing treatment and then is quenched and smashed preliminarily; and finally, ball milling is conducted through a planetary ball mill under the protection of gasoline, and the powder is taken out and dried so that the alloy wave-absorbing micro powder can be obtained.

Description

technical field [0001] The invention relates to an iron-cobalt-based alloy microwave-absorbing micropowder and a preparation method thereof, in particular to a preparation method of an iron-cobalt-based alloy microwave-absorbing micropowder added with Pr and Al. Background technique [0002] With the rapid development of modern science and technology, various electronic information technologies are more and more widely used in various fields, which brings great convenience to people's life, but also brings serious electromagnetic pollution to the society. serious threat to health. As a functional material that can absorb electromagnetic waves, microwave absorbing materials can convert electromagnetic wave energy into other forms of energy, thereby suppressing electromagnetic wave radiation and interference, and have good results. Therefore, countries all over the world are rushing to invest a lot Manpower and material resources to research and develop high-performance absor...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): B22F1/00B22F9/04C22C38/10
Inventor 孙炜炜
Owner 孙炜炜