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Process for preparing punching die by using ZTA material

A stamping die and powder technology, which is applied in clay preparation devices, chemical instruments and methods, and clay processing equipment, etc., can solve the problems of electrode powder ring fracture, low bending strength and fracture toughness, and poor wear resistance, etc. Abrasion resistance and service life, good thermal shock resistance, effect of excellent abrasion resistance

Inactive Publication Date: 2008-10-22
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

Due to the poor wear resistance of the alloy steel mold, metal debris will be mixed into the electrode powder ring during the stamping process, which will easily cause the internal short circuit of the electrode during the later use of the battery.
Domestic yttrium-stabilized zirconia ceramic molds are assembled with yttrium-stabilized zirconia ceramic inner core and metal jacket. Yttrium-stabilized zirconia stamping dies are also prone to breakage of the electrode powder ring
The imported alumina ceramic mold is assembled with alumina ceramic inner core and metal jacket. The alumina ceramic is sintered at low temperature and has the advantages of fine grain, high hardness and good wear resistance, but its bending strength and fracture toughness are higher than Yttrium stabilized zirconia, ZTA materials are much lower

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0019] The first step: according to 97mol% ZrO 2 +3mol%Y 2 o 3 Proportioning, weigh 74.25g ZrOCl 2 ·8H 2 O and 4.32g YCl 3 ·6H 2 O, add 1.05g glycerol as a dispersant according to 0.7% of the total mass of the final product ZTA powder simultaneously, and dissolve the three kinds of reagents in 200ml distilled water;

[0020] The second step: according to the ZrOCl added in the first step 2 ·8H 2 O, YCl 3 ·6H 2The total mass of O and three kinds of chemical reagents of glycerin Dilute the above solution with distilled water again to a solution with a concentration of 50g / L, stir vigorously (rotating speed is 370r / min) for 2h, then use a peristaltic pump to it while vigorously stirring Slowly add ammonia water dropwise until the solution pH=9.3 to generate a mixed sol of zirconium hydroxide and yttrium hydroxide;

[0021] The third step: wash the prepared sol repeatedly, and use AgNO 3 The solution was tested to the absence of Cl in the sol - until; then washed twice...

Embodiment 2

[0031] The first step: according to 97.5mol% ZrO 2 +2.5mol%Y 2 o 3 Proportioning, weigh 74.94g ZrOCl 2 ·8H 2 O and 3.62g YCl 3 ·6H 2 O, add glycerol 0.75g as dispersant according to 0.5% of the final product ZTA powder gross mass simultaneously, three kinds of reagents are dissolved in 200ml distilled water;

[0032] The second step: according to the ZrOCl added in step one 2 ·8H 2 O, YCl 3 ·6H 2 The total mass of O and three kinds of chemical reagents of glycerin Dilute the above solution with distilled water again to a solution with a concentration of 40g / L, vigorously stir (rotating speed is 390r / min) for 2h, then use a peristaltic pump to it while vigorously stirring Slowly add ammonia water dropwise until the solution pH=9.0 to generate a mixed sol of zirconium hydroxide and yttrium hydroxide;

[0033] Repeat the operation of the second step to the fifth step in the example 1;

[0034] Step 6: Grind the powder obtained in the fifth step through a 100-mesh sieve...

Embodiment 3

[0040] The first step: according to 98mol% ZrO 2 +2mol%Y 2 o 3 Proportioning, weigh 75.63g ZrOCl 2 ·8H 2 O and 2.91 g YCl 3 ·6H 2 O, add glycerol 1.5g as dispersant according to 1.0% of the final product ZTA powder gross mass simultaneously, three kinds of reagents are dissolved in 200ml distilled water;

[0041] The second step: according to the ZrOCl added in step one 2 ·8H 2 O, YCl 3 ·6H 2 The total mass of O and three kinds of chemical reagents of glycerin Dilute the above solution with distilled water again to a solution with a concentration of 70g / L, stir vigorously (rotating speed is 320r / min) for 2h, then use a peristaltic pump to it while vigorously stirring Slowly add ammonia water dropwise until the solution pH=9.7 to generate a mixed sol of zirconium hydroxide and yttrium hydroxide;

[0042] Repeat the third step to the fifth step in the example 1;

[0043] Step 6: Grind the powder obtained in Step 5 through a 100-mesh sieve, put it into a corundum cruci...

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Abstract

The invention discloses a method for preparing press tool by using ZTA material. The method of the invention has the following procedures: a coprecipitation method is adopted to prepare zirconium hydroxide and yttrium hydroxide collosol; yttrium stable zirconia collosol and nano-alumina powder are mixed evenly according to the mixture ratio of 75 to 95 percent weight content of A12O3 in ZTA powder materials, and calcined at the temperature of 500 to 900 DEG C to obtain the ZTA powder in which zirconia is evenly distributed; then zirconia-toughened alumina ceramics is formed by baking at the temperature of 1500 to 1600 DEG C after the isostatic pressing at the pressure of 150MPa to 250MPa. The ZTA material prepared by the method has the advantages of high strength, high fracture toughness property, high hardness, high temperature resistance, corrosion resistance and anti-abrasive property, etc. By using ZTA ceramics materials to prepare alkaline cells and tablet press tool used in pharmaceuticals industry, the abrasive resistance property of the tool is greatly increased and the life service is prolonged.

Description

technical field [0001] The invention relates to a method for using ZTA material to prepare a stamping die. The stamping die is a battery die and a tablet stamping die for the pharmaceutical industry, and belongs to the field of material technology. technical background [0002] Since Australian scholar Garvie first proposed the use of ZrO in 1975 2 Since the concept of phase change toughened ceramics, zirconia toughened alumina (ZTA) ceramics have been proved to have a better toughening effect. In recent years, with the development of nano-composite ceramics technology, the research of ZTA nano-composite ceramics has become a hot spot in the field of ceramic materials. ZTA ceramics not only show the advantages of high toughness and high strength of zirconia ceramics, but also retain the advantages of oxidation Aluminum ceramics are characterized by high modulus of elasticity and excellent wear resistance. The patent name is "ZrO 2 -Al 2 o 3 Composite materials”, the Chi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/622C04B35/10B28C1/04B28C7/04
Inventor 饶平根王娟吴建青吕明
Owner SOUTH CHINA UNIV OF TECH
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