Preparation method of nanosized silicon carbide toughened aluminum oxide bulletproof ceramic

A technology of nano-silicon carbide and alumina, which is applied in the field of special ceramics, can solve problems such as joint defects that cannot be solved, and achieve the effects of good product safety performance, uniform internal structure, and improved fracture toughness

Active Publication Date: 2009-10-14
SHANDONG GUIYUAN ADVANCED CERAMICS
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Simultaneously forming a whole piece of bulletproof ceramic material is a development trend. Due to splicing of small pieces, joint defects cannot be solved

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation method of the nano-silicon carbide toughened alumina bullet-proof ceramics according to the present invention firstly mixes and prepares the premix according to the following weight composition:

[0028] Acrylamide 30%

[0029] N,N'-Methylenebisacrylamide 2.5%

[0030] Ammonium polyacrylate 1.5%

[0031] remaining water.

[0032] Then weigh the raw materials according to the following weight percentage: α-Al with a particle size of less than 2.5um 2 o 3 Powder 98%, kaolin 1.3% through 325 mesh sieve, 0.7% calcined talc through 325 mesh sieve, plus 6% of 10-30nm nano-silicon carbide powder, and finally add the premixed solution according to 18% of all ingredients by weight, put into the mill and mix 18 hours to make initial slurry.

[0033] Put the initial slurry into a vacuum mixer, vacuumize while stirring until the vacuum reaches -0.1MPa, keep it for 35 minutes, then add 0.2% of the total weight of all ingredients N, N, N', N'-tetramethylethane D...

Embodiment 2

[0039] The preparation method of the nano-silicon carbide toughened alumina bullet-proof ceramics according to the present invention firstly mixes and prepares the premix according to the following weight composition:

[0040] Acrylamide 32%

[0041] N,N'-Methylenebisacrylamide 2%

[0042] Ammonium polyacrylate 1%

[0043] remaining water.

[0044] Then weigh the raw materials according to the following weight percentage: α-Al with a particle size of less than 2.5um 2 o 3 Powder 98.5%, kaolin 1% through 325 mesh sieve, 0.5% calcined talc through 325 mesh sieve, plus 4% 10-30nm nano-silicon carbide powder, and finally add the premixed solution according to 15% of the weight of all ingredients, and put it into the mill for mixing 16 hours to make initial slurry.

[0045] Put the initial slurry into a vacuum mixer, vacuumize while stirring until the vacuum reaches -0.1MPa, keep it for 30 minutes, then add 0.15% of the total weight of all ingredients N, N, N', N'-tetramethyle...

Embodiment 3

[0051] The preparation method of the nano-silicon carbide toughened alumina bullet-proof ceramics according to the present invention firstly mixes and prepares the premix according to the following weight composition:

[0052] Acrylamide 34%

[0053] N,N'-Methylenebisacrylamide 2.5%

[0054] Ammonium polyacrylate 1.5%

[0055] remaining water.

[0056] Then weigh the raw materials according to the following weight percentage: α-Al with a particle size of less than 2.5um 2 o 3 powder 98.2%, kaolin 1.2% passing through a 325 mesh sieve, 0.6% calcined talc passing a 325 mesh sieve, plus 4% 10-30nm nano-silicon carbide powder, and finally add the premixed solution according to 16% of the weight of all ingredients, and put it into the mill for mixing 16 hours to make initial slurry.

[0057] Put the initial slurry into a vacuum mixer, vacuumize while stirring until the vacuum reaches -0.1MPa, keep it for 35 minutes, then add 0.18% of the total weight of all ingredients N, N, N...

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Abstract

The invention relates to a preparation method of a nanosized silicon carbide toughened aluminum oxide bulletproof ceramic, which belongs to the technical field of the special ceramic. The preparation method comprises the following steps of blending, molding and burning and is characterized in that the basic components comprises 98-98.5 percent of alpha-Al2O3 power with grain size being less than 2.5 mum, 0.8-1.3 percent of kaolin with 325 meshes and 0.5-1.0 percent of burn talc with 325 meshes according to the percentage by weight, the components above are taken as the base number, the 3-8 percent of nanosized silicon carbide with grain size of 10-30 nanometers is additionally added in; a gel-casting method is adopted; and the burning schedule is as follows: the burnt temperature is 1650-1700 DEG C, and the heat preservation time is 3-5 hours. The invention is low in cost and good in quality and is favorable for the large-scale production.

Description

technical field [0001] The invention relates to a preparation method of nanometer silicon carbide toughened alumina bulletproof ceramics, which belongs to the technical field of special ceramics. Background technique [0002] Bulletproof ceramics are mainly used in the protection of individuals, tanks, key parts of aircraft and helicopters, and mine explosions during combat. At present, as bulletproof materials, there are mainly alumina, zirconia toughened alumina, silicon carbide, silicon nitride, silicon carbide whiskers, titanium carbide whiskers composite toughened alumina. The biggest advantage of bulletproof materials is light weight, while the weight reduction of zirconia toughened bulletproof ceramics is not obvious, and its bulletproof effect is not much improved compared with 99 alumina bulletproof ceramics, and it is gradually eliminated in the market; silicon carbide bulletproof ceramics are brittle. It is difficult to solve, it can only bear one bullet, and cann...

Claims

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Application Information

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IPC IPC(8): C04B35/622C04B35/10
Inventor 高礼文樊震坤许业静刘天程范勇
Owner SHANDONG GUIYUAN ADVANCED CERAMICS
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