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High purity and high density ytterbiu-stabilized zirconia ceramic and preparation method thereof

A technology of yttrium-stabilized zirconia and ceramics, applied in the field of high-purity and high-density yttrium-stabilized zirconia ceramics and its preparation, can solve problems such as low strength and coarse grains of products, and achieve high density, uniform degassing, and low gas impurity content low effect

Inactive Publication Date: 2017-07-11
南京金鲤新材料有限公司
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0007] At present, the existing technologies are all produced by conventional sintering methods. The grains of the products are coarse and the strength is low, so it is difficult to be used in the high-demand precision ceramic industry.

Method used

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Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0072] (1) Select raw materials, the purity of yttrium-stabilized zirconia powder is 99.99%, the molar percentage of yttrium oxide is 3%, and the primary particle size is 17 nanometers, and then the powder is put into a centrifugal atomization granulator to produce D50 is 121 microns.

[0073] (2) Put the granulated raw material powder into a rubber sleeve for cold isostatic pressing. The pressure of cold isostatic pressing is 360MPa, and the holding time is 10 minutes.

[0074] (3) Put the pressed billet into the ladle cover, and reserve 16 air holes in the ladle cover.

[0075] (4) Degas the ladle for one stage. The temperature is 200°C, the degassing time is 12 hours, and the pressure inside the ladle is 1.0×10 -2 Pa; the second-stage degreasing temperature is 600°C, the degreasing time is 24 hours, and the pressure in the bag is 1.0×10 -2 Pa; the three-stage degassing temperature is 200°C, the degassing time is 12 hours, and the pressure in the envelope is 1.0×10 -3 Pa,...

Embodiment 2

[0080] (1) Select raw materials, the purity of yttrium-stabilized zirconia powder is 99.995%, the molar percentage of yttrium oxide is 5%, and the primary particle size is 35 nanometers, and then the powder is put into a centrifugal atomization granulator to produce D50 is 142 microns.

[0081] (2) Put the granulated raw material powder into a rubber sleeve for cold isostatic pressing. The pressure of cold isostatic pressing is 380MPa, and the holding time is 12 minutes.

[0082] (3) Put the pressed billet into the ladle sleeve, and reserve 24 air holes in the ladle sleeve.

[0083] (4) Degas the ladle for one stage. The temperature is 240°C, the degassing time is 18 hours, and the pressure inside the ladle is 1.0×10 -2 Pa; the second-stage degreasing temperature is 650°C, the degreasing time is 28 hours, and the pressure in the bag is 1.0×10 -2 Pa; the three-stage degassing temperature is 220°C, the degassing time is 16 hours, and the pressure in the envelope is 1.0×10 -3 ...

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Abstract

The present invention provides a new high purity and high density ytterbiu-stabilized zirconia ceramic and a preparation method thereof, the new high purity and high density ytterbiu-stabilized zirconia ceramic is prepared by granulation of high purity nano ytterbiu stabilized zirconia powder by centrifugal spray granulation method, molding by cold isostatic pressing, and final sintering by hot isostatic pressing method, the new high purity and high density ytterbiu-stabilized zirconia ceramic has the advantages of high purity and high density, the method has the advantages of simple process and equipment, low cost, high yield, low energy consumption and high production efficiency, and is suitable for industrialized production, and the ytterbiu-stabilized zirconia ceramic with stable quality and fine controllable grains can be obtained, and the preparation method is a new preparation method of the high purity and high density ytterbiu-stabilized zirconia ceramic with low cost and stable quality, and the process has no environmental pollution.

Description

technical field [0001] The invention belongs to the technical field of material preparation, and in particular relates to a high-purity and high-density yttrium-stabilized zirconia ceramic and a preparation method thereof. Background technique [0002] Zirconia is one of the most widely used ceramic materials. It has three phases with different structures, namely monoclinic phase, tetragonal phase and cubic phase. Different phase content can have a greater impact on the performance of zirconia ceramic materials. . At present, most common materials are yttrium-stabilized zirconia materials. Among them, 3Y-TZP (Teragonal zirconia polycrystalsstabilized, 3 mole fraction Y2O3) material has the best mechanical properties. It is also the most commonly used type of zirconia ceramic material. It has broad application prospects in different industries, such as chemical industry, machinery, etc. . [0003] Chinese patent 201110450949.8 provides a flexible yttrium-stabilized zirconi...

Claims

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Application Information

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IPC IPC(8): C04B35/488C04B35/626C04B35/645
CPCC04B35/488C04B35/62695C04B35/6455C04B2235/60C04B2235/77C04B2235/785C04B2235/786C04B2235/96
Inventor 不公告发明人
Owner 南京金鲤新材料有限公司