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
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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, whi

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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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Example Embodiment

[0027] Example 1

[0028] Such as Figure 1 to Figure 3 As shown, figure 1 It is a graph showing the change of powder morphology before and after the additives of the present invention are added; the comparative powder has serious agglomeration and uneven distribution of ZrO2. The powder particles of the examples are small and the agglomeration is lighter. ZrO2 is distributed on the surface of spherical particles with uniform dispersion;

[0029] figure 2 It is a diagram of the composition change of the powder sintered sample before and after the additives of the present invention are added; t-ZrO2 is significantly increased, which is beneficial to improve the strength and toughness of the material;

[0030] image 3 It is a graph showing changes in mechanical properties of sintered samples before and after the additives of the present invention are added. The addition of Al improves the dispersibility of ZrO2 in the powder. After sintering, the ZrO2 grains are fine, the content of...

Example Embodiment

[0043] Example 2

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

[0045] The preparation method of ZTA nano composite powder of the present invention includes the following steps:

[0046] In step (1), the raw material spherical Al 2 O 3 , ZrO 2 , MgO and additive powder are pre-mixed according to the ratio 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 ball is agate ball, and the premixed powder and agate ball are put into the nylon ball milling tank according to the ball-to-battery ratio of 4:1, and absolute ethanol is used as the ball milling medium. The horizontal surface of the ball milling ball in the nylon tank is 1.2cm, and the process control agent is added;

[0052] In step (3), the ball milling speed is 45 rpm, and the ball milling time is 48 hours.

Example Embodiment

[0053] Example 3

[0054] The difference between Example 3 and Example 1 is that: a method for preparing ZTA nanocomposite powder of the present invention includes the following steps:

[0055] In step (1), the raw material spherical Al 2 O 3 , ZrO 2 , MgO, and additive powder are pre-mixed 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 greater than or equal to 99.5%, and the particle size of Al powder is less than or equal to Al 2 O 3 Powder particle size.

[0061] In step (2), the ball milling ball is an agate ball, and the premixed powder and agate ball are put into the nylon ball milling tank according to the ball-to-material ratio of 4.5:1, using absolute ethanol as the ball milling medium, and the amount of absolute ethanol added is 2cm ...

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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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