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Al2O3-TiN porous ceramic material and preparation method thereof

A technology of al2o3-tin and porous ceramics, applied in the field of material science, can solve the problems of unfavorable promotion and application of composite materials, complex equipment and process, low production efficiency, etc., and achieve the effect of novel concept, easy large-scale production and low cost

Inactive Publication Date: 2014-09-24
QINGDAO AGRI UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] Traditional Al 2 o 3 -TiN composite materials are mainly prepared by mixing alumina and titanium nitride powders and then hot-pressing and sintering at a high temperature of about 1700°C under relatively high pressure, or using titanium dioxide and metal aluminum or carbon to synthesize powders in situ After hot pressing sintering, gas pressure sintering, etc., or spark plasma sintering, the traditional preparation equipment and process are complicated, the production efficiency is low, and the cost is high, which is not conducive to the promotion and application of composite materials.

Method used

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  • Al2O3-TiN porous ceramic material and preparation method thereof
  • Al2O3-TiN porous ceramic material and preparation method thereof
  • Al2O3-TiN porous ceramic material and preparation method thereof

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Embodiment 1

[0028] The technical scheme of the present invention provides an Al 2 o 3 -TiN porous ceramic material, the Al 2 o 3 - The TiN porous ceramic material consists of raw materials in the following weight ratios: Al 2 o 3 Coarse particle 15%, Al 2 o 3 Fine particle 45%, α-Al 2 o 3 Micropowder 30.54%, TiO 2 Micro powder 6.53%, Al powder 2.93%. The Al 2 o 3 The diameter of the coarse particle is 1mm; the Al 2 o 3 The fine particles have a diameter of 0.5 mm. The α-Al 2 o 3 Micronized D 50 The median particle size is 9.42 μm; the TiO 2 The average particle size of the fine powder is 0.5 μm; the D of the Al powder 50 The median particle size is 38.28 μm.

[0029] Preparation of Al 2 o 3 -A method for a TiN porous ceramic material, comprising the steps of:

[0030] (1) α-Al 2 o 3 、TiO 2 , Al various fine powders are put into the nylon ball milling tank according to the required ratio, the ball milling medium is corundum ball, and the material: ball ratio is 1:2...

Embodiment 2

[0035] The technical scheme of the present invention provides an Al 2 o 3 -TiN porous ceramic material, the Al 2 o 3 - The TiN porous ceramic material consists of raw materials in the following weight ratios: Al 2 o 3 Coarse particle 15%, Al 2 o 3 Fine particle 45%, α-Al 2 o 3 Micropowder 20.86%, TiO 2 Micro powder 13.20%, Al powder 5.94%. The Al 2 o 3 The diameter of the coarse particle is 0.8mm; the Al 2 o 3 The fine particles have a diameter of 0.3 mm. The α-Al 2 o 3 Micronized D 50 The median particle size is 8 μm; the TiO 2 The average particle size of the fine powder is 1 μm; the D of the Al powder 50 The median particle size is 15 μm.

[0036] Preparation of Al 2 o 3 -A method for a TiN porous ceramic material, comprising the steps of:

[0037] (1) α-Al 2 o 3 、TiO 2 , Al various fine powders are put into the nylon ball mill tank according to the required ratio, the ball milling medium is corundum balls, take out after dry mixing, and Al 2 o 3 ...

Embodiment 3

[0042] The technical scheme of the present invention provides an Al 2 o 3 -TiN porous ceramic material, the Al 2 o 3 - The TiN porous ceramic material consists of raw materials in the following weight ratios: Al 2 o 3 Coarse particle 15%, Al 2 o 3 Fine particle 45%, α-Al 2 o 3 Micropowder 10.95%, TiO 2 Micro powder 20.04%, Al powder 9.01%. The Al 2 o 3 The diameter of the coarse particle is 0.8mm; the Al 2 o 3 The fine particles have a diameter of 0.3 mm. The α-Al 2 o 3 Micronized D 50 The median particle size is 8 μm; the TiO 2 The average particle size of the fine powder is 1 μm; the D of the Al powder 50 The median particle size is 15 μm.

[0043] Preparation of Al 2 o 3 -A method for a TiN ceramic composite comprising the steps of:

[0044] (1) α-Al 2 o 3 、TiO 2 , Al various fine powders are put into the nylon ball mill tank according to the required ratio, the ball milling medium is corundum balls, take out after dry mixing, and Al 2 o 3 Coarse ...

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Abstract

An Al2O3-TiN porous ceramic material and a preparation method thereof. The Al2O3-TiN porous ceramic material comprises the following raw materials: Al2O3 coarse and fine particles, and alpha-Al2O3, TiO2, Al fine powder. First of all, the fine powder is filled into a nylon tank spherical tank according to the proportion for dry mix, then the coarse and fine particles are added into phenolic resin and ethylene glycol in a forced mixer in particle for mixing, and the mixture is pressed by a machine for molding. A pressed sample is dried and subjected to atmospheric pressure in situ sintering reaction in flowing nitrogen to obtain the Al2O3-TiN porous ceramic material. The invention has novel design, tabular corundum particles are used as the skeleton to ensure the porous ceramic material has enough strength and hardness, in situ reaction between TiN-TiO2 and metal Al generates TiN, and consumption of metal Al and pores caused by thermal explosion reaction form uniform porous structure. The invention has the advantages of simple preparation process and equipment, low cost and easiness for large-scale production.

Description

technical field [0001] The present invention relates to the field of material science, especially Al 2 o 3 -TiN porous ceramic material and its preparation method. Background technique [0002] No Al has been seen so far 2 o 3 -Report of TiN porous ceramic material. Al 2 o 3 Ceramics have high strength, high hardness, high wear resistance, high resistance and stable chemical properties, and are widely used in various fields such as electronics, metallurgy, chemical industry, machinery, etc., but their high sintering temperature significantly increases the preparation cost and processing The difficulty of increasing, while Al 2 o 3 The brittleness of ceramics greatly limits its application prospects. Due to TiN and Al 2 o 3 The physical and chemical properties are similar, in Al 2 o 3 Adding TiN to the matrix material can significantly enhance the toughness, strength, wear resistance and electrical conductivity of the composite material. [0003] Traditional Al ...

Claims

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Application Information

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IPC IPC(8): C04B35/10C04B35/622
Inventor 冯秀梅
Owner QINGDAO AGRI UNIV
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