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Method for preparing high dielectric loss titanium silicon carbon microwave absorbent powder

A technology of microwave absorbing agent and titanium silicon carbon is applied in the field of preparation of high dielectric loss titanium silicon carbon powder microwave absorbing agent, which can solve the problems of low microwave dielectric loss and low purity, and achieve the absorption frequency bandwidth and the preparation process. Simple and low cost of raw materials

Inactive Publication Date: 2015-03-04
XIDIAN UNIV
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a kind of preparation method of high dielectric loss titanium silicon carbon powder body microwave absorber, solve existing titanium silicon carbon (Ti silicon carbon) 3 SiC 2 ) The problem of low purity and low microwave dielectric loss of the material

Method used

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  • Method for preparing high dielectric loss titanium silicon carbon microwave absorbent powder
  • Method for preparing high dielectric loss titanium silicon carbon microwave absorbent powder
  • Method for preparing high dielectric loss titanium silicon carbon microwave absorbent powder

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Experimental program
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Effect test

Embodiment 1

[0050] Mole ratio is n Ti :n Si :n Al :n TiC =2:1.8:0.4:3 Weigh titanium powder Ti, silicon powder Si, aluminum powder Al and titanium carbide powder TiC respectively, wherein, the average particle diameter of titanium powder Ti is 45 μ m, the average particle diameter of silicon powder Si is 45 μ m, The average particle size of the aluminum powder Al is 45 μm, and the average particle size of the titanium carbide powder TiC is 38 μm; the weighed titanium powder Ti, silicon powder Si, aluminum powder Al and titanium carbide powder TiC are mixed together to form a mixture A; Put the mixture A in the planetary ball mill, measure absolute ethanol according to the mass of mixture A, add 1ml of absolute ethanol per g of mixture A, add the measured absolute ethanol into the planetary ball mill as a medium, and turn on the planetary ball mill. Type ball mill, ball milled at a rate of 250r / min for 6h to obtain mixture B; take out mixture B obtained after ball milling, place mixture...

Embodiment 2

[0055] Mole ratio is n Ti :n Si :n Al :n TiC =1:1.5:0.2:2 Take titanium powder Ti, silicon powder Si, aluminum powder Al and titanium carbide powder TiC respectively, wherein, the average particle diameter of titanium powder Ti is 58 μ m, the average particle diameter of silicon powder Si is 58 μ m, The average particle size of the aluminum powder Al dopant is 58 μm, and the average particle size of the titanium carbide powder TiC is 45 μm; the weighed titanium powder Ti, silicon powder Si, aluminum powder Al and titanium carbide powder TiC are mixed together to form a mixture A The prepared mixture A is put into the planetary ball mill, measure dehydrated alcohol by the quality of mixture A, add the dehydrated alcohol of 1.2ml of the mixture A of every g, add the dehydrated alcohol measured as medium into the planetary ball mill , turn on the planetary ball mill, and ball mill at a rate of 300r / min for 8 hours to obtain mixture B; take out the mixture B obtained after ball...

Embodiment 3

[0060] Mole ratio is n Ti :n Si :n Al :n TiC =3:2:0.6:4 Weigh titanium powder Ti, silicon powder Si, aluminum powder Al and titanium carbide powder TiC respectively, wherein, the average particle diameter of titanium powder Ti is 62 μm, and the average particle diameter of silicon powder Si is 62 μm, The average particle size of the aluminum powder Al dopant is 62 μm, and the average particle size of the titanium carbide powder TiC is 58 μm; the weighed titanium powder Ti, silicon powder Si, aluminum powder Al and titanium carbide powder TiC are mixed together to form a mixture A The mixture A prepared is put into the planetary ball mill, and dehydrated alcohol is taken by the quality of the mixture A, the dehydrated alcohol of every g of the mixture A is added 1.3ml, and the dehydrated alcohol that is measured is added into the planetary ball mill as a medium , turn on the planetary ball mill, and ball mill at a speed of 320r / min for 10 hours to obtain a mixture B; take ou...

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Abstract

The invention discloses a method for preparing high dielectric loss titanium silicon carbon microwave absorbent powder. The method includes the following steps specifically: 1, weighing titanium powder Ti, silica powder Si, titanium carbide TiC and aluminum powder Al respectively, then ball-milling mixing the weighed titanium powder Ti, silica powder Si, titanium carbide TiC and aluminum powder Al to prepare a mixture powder A; 2, sieving the mixture powder A obtained in step 1 by a 200-mesh sieve to break down aggregated objects and obtain a mixture powder B, wherein the average grain diameter of the mixture powder B is 74 micrometers blow; 3, placing the mixture powder B obtained in step 2 in a vacuum sintering furnace, vacuumizing, and performing high temperature solid-phase reaction to prepare and obtain Al-doped high-purity Ti3SiC2 phase microwave absorbent powder. The preparation method provided by the invention solves the problem that the conventional Ti3SiC2 is low in purity and microwave dielectric loss.

Description

technical field [0001] The invention belongs to the technical field of preparation methods of high-temperature wave-absorbing materials and electromagnetic shielding materials, and relates to a preparation method of high-dielectric loss titanium-silicon-carbon powder microwave absorbers. Background technique [0002] The rapid development of modern radio technology and radar detection systems has greatly promoted the development and application of absorbing materials in military and civilian fields. According to the microwave loss mechanism, absorbing materials are mainly divided into two categories: dielectric absorbing materials and magnetic absorbing materials. However, most of the microwave absorbers of these two types of materials currently developed can only be used at lower temperatures, such as: dielectric carbon black series microwave absorbers are easily oxidized at high temperatures and lose their microwave-absorbing properties; Oxygen, carbonyl iron powder and o...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/515C04B35/626
Inventor 李智敏黄云霞张茂林马晓华仲鹏
Owner XIDIAN UNIV
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