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Preparation method of ZTA nano composite powder

A nano-composite and powder technology, which is applied in the field of large-scale and rapid ZTA nano-composite powder preparation, can solve the problems of complicated ZTA nano-composite powder technological process, unfavorable large-scale industrial production, long process cycle, etc. The effect of industrial large-scale continuous production, environmental protection, and simple process operation

Inactive Publication Date: 2018-03-13
SOUTHWEST UNIVERSITY
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

The disadvantage is that the process of preparing ZTA nanocomposite powder by liquid phase precipitation is complicated, there are many control variables, and the process cycle is long, which is not conducive to the promotion of large-scale industrial production
[0003] At present, there is a lack of a preparation method for ZTA nanocomposite powder with easy process operation.

Method used

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  • Preparation method of ZTA nano composite powder
  • Preparation method of ZTA nano composite powder
  • Preparation method of ZTA nano composite powder

Examples

Experimental program
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Effect test

Embodiment 1

[0028] Such as Figure 1 to Figure 3 as shown, figure 1 It is the graph of the powder morphology change before and after the addition of the additive of the present invention; the powder of the comparative example is seriously agglomerated, ZrO2 is unevenly distributed, the powder particles of the embodiment are fine, and the agglomeration is relatively light, and ZrO2 is distributed on the surface of the spherical particle and uniformly dispersed;

[0029] figure 2 It is a diagram of the composition change of the powder sintered sample before and after the addition of the additive of the present invention; t-ZrO2 increases obviously, which is conducive to improving the strength and toughness of the material;

[0030] image 3 It is a graph showing the change in mechanical properties of the sintered sample before and after adding the additive of the present invention. The addition of Al improves the dispersion of ZrO2 in the powder, and the ZrO2 grains are finer after sint...

Embodiment 2

[0044] The difference between embodiment 2 and embodiment 1 is:

[0045] A kind of preparation method of ZTA nanocomposite powder of the present invention, comprises the steps:

[0046] In step (1), the raw material spherical Al 2 o 3 , ZrO 2 , MgO, and additive powder are premixed according to the proportioning configuration; the raw material powder includes the following components according to mass percentage:

[0047] 15%≤ZrO 2 ≤30%,

[0048] MgO 0.25,

[0049] 0.5%≤Al≤5%,

[0050] The balance is additive powder.

[0051] In step (2), the ball milling balls are agate balls, and the premixed powder and agate balls are put into the nylon ball milling tank according to the ball-to-material ratio of 4:1, and absolute ethanol is used as the ball milling medium, and the amount of absolute ethanol added is Submerged 1.2cm above the level of ball milling balls in the nylon tank, and added process control agent;

[0052] In step (3), the ball milling speed is 45 rpm, and t...

Embodiment 3

[0054] The difference between embodiment 3 and embodiment 1 is: the preparation method of a kind of ZTA nanocomposite powder of the present invention, comprises the steps:

[0055] In step (1), the raw material spherical Al 2 o 3 , ZrO 2 , MgO, and additive powder are premixed according to the proportioning configuration; the raw material powder includes the following components according to mass percentage:

[0056] 15%≤ZrO 2 ≤30%,

[0057] MgO 0.25,

[0058] 0.5%≤Al≤5%,

[0059] The balance is additive powder;

[0060] The additive powder is Al powder, its purity is ≥99.5%, and the particle size of Al powder is ≤Al 2 o 3 Powder size.

[0061] In step (2), the ball milling balls are agate balls, and the premixed powder and agate balls are put into the nylon ball milling tank according to the ball-to-material ratio of 4.5:1, and absolute ethanol is used as the ball milling medium, and the addition of absolute ethanol is Submerge 2cm of the ball milling ball level in th...

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Abstract

The invention discloses a preparation method of ZTA nano composite powder. The preparation method comprises the following steps of: (1) weighing raw materials including spherical Al2O3, ZrO2, MgO andadditive powder according to proportions, and premixing the raw materials; (2) using an agate ball as a ball milling ball, putting the premixed powder and the agate ball into a nylon ball milling tankaccording to a ball-material ratio of 4-5:1, using anhydrous ethanol as a ball milling medium with the addition amount of 1-2cm above the horizontal plane of the ball milling ball in the nylon tank,and adding a process control agent; (3) carrying out ball milling with a horizontal ball mill, and controlling the ball milling rate and the ball milling time; and (4) carrying out ball-material separation with anhydrous ethanol after ball milling, drying the separated mixed solution, and sieving the powder after drying through a sieve of 80 meshes to obtain ZTA nano composite powder. The preparation method provided by the invention has the advantages of short process flow, simple and convenient process operation, low equipment requirement, low cost, less emission of three wastes, less harm toenvironment and human bodies, and convenience for popularization and industrial large-scale continuous production.

Description

technical field [0001] The invention belongs to the technical field of non-metallic nanometer materials, and in particular relates to a large-scale and rapid preparation method of ZTA nanocomposite powder. Background technique [0002] "Research on the Properties of ZTA Composite Ceramics Prepared by Nano Powder" in the 15th issue of "Journal of Ceramics" in 2016 introduced a method of preparing ZTA nanocomposite ceramic materials by liquid phase precipitation. The method is NH 4 Al(SO 4 ) 2 , ZrOCl 2 , Y(NO 3 ) 3 and NH 4 HCO 3 It is a precursor, mixed and stirred according to a certain proportion and sequence, and the precipitate is calcined into powder at 1000°C. The disadvantage is that the process of preparing ZTA nanocomposite powder by liquid phase precipitation method is complicated, there are many control variables, and the process cycle is long, which is not conducive to the promotion of large-scale industrial production. [0003] At present, there is a lac...

Claims

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Application Information

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IPC IPC(8): C04B35/48C04B35/626
CPCC04B35/48C04B35/62615C04B2235/3206C04B2235/3217C04B2235/402
Inventor 蒋显全齐保彭和
Owner SOUTHWEST UNIVERSITY
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