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Method for preparing stable zirconia by mechano-chemical process

A technology of stabilizing zirconia and mechanochemical method, applied in the field of nanomaterial synthesis, can solve problems such as environmental pollution, and achieve the effects of environmental friendliness, simple process, and low temperature in the preparation process

Active Publication Date: 2014-02-12
广东达昊科技有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Moreover, the wet chemical method requires a large amount of solvent, so it is easy to cause environmental pollution.

Method used

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  • Method for preparing stable zirconia by mechano-chemical process
  • Method for preparing stable zirconia by mechano-chemical process

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0024] A, take by weighing 4 grams of MgO powder, take by weighing 196 grams of zirconia powder;

[0025] b. Put the above-mentioned powder into a ball mill jar, and add 200 grams of deionized water and 400 grams of zirconia grinding balls;

[0026] c, on the ball mill, with a speed of 120 rev / min, the ball mill was mixed for 5 hours;

[0027] d. Use a filter screen to filter the grinding balls, place the slurry in an oven at 120°C to dry the slurry for 1.5 hours, crush the dried agglomerated powder with a mortar, and pass through a 20-mesh sieve to granulate;

[0028] e. Fill the granulated powder into the screw mill with a filling ratio of 2g / ml;

[0029] f. Then put the above powder into a screw grinder for grinding, control the power of the grinder at 2.4kw, grind the powder, rotate forward for 15 minutes, reverse for 1 minute, and stop for 4 minutes. Cycle like this 20 times, obtain 12mol% Mg-doped tetragonal phase zirconia, its XRD pattern sees attached figure 1 .

Embodiment 2

[0031] a. Weigh Y 2 o 3 5 grams of powder, weigh 195 grams of zirconia powder;

[0032] b. Put the above-mentioned powder into a ball mill jar, and add 200 grams of deionized water and 400 grams of zirconia grinding balls;

[0033] c, on the ball mill, with a speed of 100 rpm, ball milling for 6 hours for mixing;

[0034] d. Use a filter screen to filter the grinding balls, place the slurry in an oven at 100°C to dry the slurry for 2 hours, crush the dried agglomerated powder with a mortar, and pass through a 20-mesh sieve to granulate;

[0035] e. Fill the granulated powder into the screw mill with a filling ratio of 2g / ml;

[0036] f. Then put the above-mentioned powder into a screw grinder for grinding, control the power of the grinder at 3kw, grind the powder, rotate forward for 15 minutes, reverse for 1 minute, and stop for 4 minutes. So cycle 18 times,

[0037] Obtain 5mol% doping Y tetragonal phase zirconia, its XRD collection of patterns refers to attached figur...

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Abstract

The invention discloses a method for preparing stable zirconia by a mechano-chemical process. The method is characterized in that a screw type grinding machine is used for grinding zirconia powder doped with monoclinic phase, and the Mg-stable zirconia and the Y-stable zirconia can be prepared by utilizing the action of extrusion and shearing force of the screw type grinding machine. According to the method disclosed by the invention, the Y or Mg-stable zirconia with high content of tetragonal phase can be fast, simply, conveniently and effectively prepared, and the method has the advantages of simple process, low cost, low temperature during the preparation process and environment-friendly effect, and is of a green and environment-friendly synthesis process.

Description

technical field [0001] The invention relates to the technical field of nanomaterial synthesis, in particular to a mechanochemical synthesis method of Mg-stabilized zirconia and Y-stabilized zirconia. Background technique [0002] Since a large volume change occurs when monoclinic zirconia transforms to a tetragonal phase, and a large volume change occurs in the opposite direction when it is cooled, it is easy to cause cracking of the product, which limits the use of pure zirconia. Applications in high temperature areas. However, adding an appropriate amount of crystal stabilizer MgO or Y 2 o 3 Later, ZrO can be made 2 The phase transition temperature is lowered below room temperature, and the toughness of the ceramic material is improved, so there will be no sudden change in volume after heating, which greatly expands the application range of zirconia. Doping stabilized tetragonal zirconia mainly has the following important applications: [0003] 1. Structural ceramics:...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/626
Inventor 李强吴皓
Owner 广东达昊科技有限公司