Al2O3-ZrO2-Y2O3-TiN nano composite ceramic powder and preparation method thereof

A ceramic powder and nano-composite technology, which is applied in chemical instruments and methods, zirconium compounds, inorganic chemistry, etc., can solve the problems of local component segregation and unsatisfactory mechanical properties of composite ceramic materials, and achieve good dispersion, Good hardness and wear resistance, the effect of improving mechanical properties

Inactive Publication Date: 2019-07-16
中国有色桂林矿产地质研究院有限公司
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

This method often leads to the agglomeration of the added phase TiN, or the segregation of local components, so that the mechanical properties of the final composite ceramic material cannot meet people's needs.

Method used

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  • Al2O3-ZrO2-Y2O3-TiN nano composite ceramic powder and preparation method thereof
  • Al2O3-ZrO2-Y2O3-TiN nano composite ceramic powder and preparation method thereof

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preparation example Construction

[0025] The present invention also provides the Al described in the above technical scheme 2 o 3 -ZrO 2 -Y 2 o 3 -The preparation method of TiN nanocomposite ceramic powder, comprises the following steps:

[0026] (1) Mix organic salts of aluminum salt, zirconium salt, yttrium salt and titanium salt in an organic solvent, add ammonia water to carry out hydrolysis reaction, and obtain a hydrolysis reaction product;

[0027] (2) After the hydrolysis reaction product obtained in the step (1) is subjected to solid-liquid separation, the solid is dried to obtain an intermediate product powder;

[0028] (3) The intermediate product powder obtained in the step (2) is subjected to gradient calcination to obtain Al 2 o 3 -ZrO 2 -Y 2 o 3 -Ti 2 O solid solution;

[0029] (4) The solid solution obtained in the step (3) is subjected to selective nitriding reaction under ammonia gas to obtain Al 2 o 3 -ZrO 2 -Y 2 o 3 -TiN nanocomposite ceramic powder; the temperature of the s...

Embodiment 1

[0041] Aluminum isopropoxide (C 9 h 21 AlO 3 ), zirconium n-propoxide (C 12 h 28 o 4 Zr), yttrium isopropoxide (C 9 h 21 o 3 Y) and isopropyl titanate (C 12 h 28 o 4 Ti) as raw material, according to molar ratio ZrO 2 :Y 2 o 3 =98.5:1.5, ZrO 2 :Al 2 o 3 :TiO 2 =60:25:15 Weigh the raw materials, 19.65 grams of zirconium n-propoxide, 10.2 grams of aluminum isopropoxide, 4.26 grams of isopropyl titanate, and 0.486 grams of yttrium isopropoxide. It was dissolved in isopropanol, left for two hours, ammonia water was added as a precipitating agent, and then refluxed at a temperature of 78° C. for 24 hours to obtain a hydrolyzed product. The hydrolyzate was centrifuged and the resulting solid washed with hot water. Then the washed solid was dried in vacuum at 120° C. to obtain an intermediate product (powder).

[0042] The obtained intermediate product (powder) was calcined in air at 700°C for 9 hours, and then calcined in high-temperature air at 900°C for 3 hours ...

Embodiment 2

[0049] Aluminum isopropoxide (C 9 h 21 AlO 3 ), zirconium n-propoxide (C 12 h 28 o 4 Zr), yttrium isopropoxide (C 9 h 21 o 3 Y) and isopropyl titanate (C 12 h 28 o 4 Ti) as raw material, according to molar ratio ZrO 2 :Y 2 o 3 =98.5:1.5, ZrO 2 :Al 2 o 3 :TiO 2 =80:15:5 Weigh the raw materials, 26 grams of zirconium n-propoxide, 6 grams of aluminum isopropoxide, 1.4 grams of isopropyl titanate, and 0.646 grams of yttrium isopropoxide. It was dissolved in isopropanol, left for two hours, ammonia water was added as a precipitating agent, and then refluxed at a temperature of 78° C. for 24 hours to obtain a hydrolyzed product. The hydrolyzate was centrifuged and the resulting solid washed with hot water. Then the washed solid was dried in vacuum at 120° C. to obtain an intermediate product (powder).

[0050] The obtained intermediate product (powder) was calcined in air at 700°C for 9 hours, and then calcined in high-temperature air at 900°C for 3 hours to obtai...

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Abstract

The invention provides Al2O3-ZrO2-Y2O3-TiN nano composite ceramic powder and a preparation method thereof, and belongs to the field of ceramic materials. The molar ratio of Zr to Al to Y to Ti in theceramic powder is (30-70):(10-30):(0.4-1):(5-20). The nano composite ceramic powder has good dispersibility and no agglomeration, and a ceramic material obtained through sintering of the nano composite ceramic powder has good mechanical properties. Results of the embodiments in the invention show that the ceramic material obtained through sintering of the nano composite ceramic powder has a hardness of 28-35 GPa and an abrasive ratio of (4500-6000):1.

Description

technical field [0001] The invention relates to the field of ceramic materials, in particular to a nanocomposite ceramic powder and a preparation method thereof. Background technique [0002] Zirconia-toughened alumina ceramics (zirconia-toughenedalumina, ZTA) materials have good mechanical properties, and the strength and toughness of ZTA materials can be changed by changing Y 2 0 3 However, the mechanical properties of the final ceramic material still cannot meet people's needs. [0003] In order to improve the hardness and wear resistance of ZTA materials, people choose TiN as the additive phase to make oxide and non-oxide composite ceramics. After introducing TiN into the ZTA material, on the one hand, the high melting point and high hardness of TiN can be used to improve the wear resistance and hardness of the ZTA material; on the other hand, the high conductivity of TiN can be used to process the ZTA material into Devices with complex shapes. [0004] However, the ...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/626
CPCC04B35/48C04B35/62605C04B2235/3217C04B2235/3225C04B2235/3886C04B2235/5454C04B2235/96C04B35/4885C04B35/62675C04B2235/3244C04B35/6325C04B2235/465C04B35/6264C04B2235/441C04B2235/549C01G25/006C04B35/6268C04B2235/6567C04B2235/658C04B2235/661
Inventor 陈超陈家荣莫培程
Owner 中国有色桂林矿产地质研究院有限公司
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