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A kind of zirconia composite ceramics and preparation method thereof

A technology of composite ceramics and zirconia, which is applied in the field of zirconia composite ceramics and its preparation, high hardness zirconia composite ceramics and its preparation, and high strength and toughness. It can solve the problems of high toughness and high strength that are difficult to match, and reduce microscopic defects. , The preparation process is simple, and the effect of solving the reduction of the overall performance of ceramics

Active Publication Date: 2015-11-25
CENT SOUTH UNIV +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] The present invention aims at the deficiency that it is difficult to match the high toughness and high strength of existing zirconia composite ceramics, and provides a zirconia composite ceramic with both high toughness and high strength and a preparation method thereof

Method used

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  • A kind of zirconia composite ceramics and preparation method thereof
  • A kind of zirconia composite ceramics and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] By mass ratio, nano-TiO 2 Powder: Nano B 2 O 3 Powder = 1.20:1, with nano-TiO 2 Powder (TiO 2 particle size of 50nm) and nano-B 2 O 3 powder (B 2 O 3 The particle size is 50nm);

[0055] Then press the assigned B 2 O 3 Powder and TiO 2 The ratio of total powder mass to carbohydrate mass is 1:8 to prepare sucrose powder (the particle size of sucrose powder is 200nm, and the mass percentage of C element is about 42.1%);

[0056] Then the prepared TiO 2 powder, B 2 O 3 The powder and sucrose powder were ground and mixed, and the temperature was raised to 200 °C under an argon atmosphere, and the temperature was maintained for 3 h. The carbon coating pretreatment was carried out to obtain a carbon coating modified (TiO 2 +B 2 O 3 ) mixed powder. 75.0wt.% ZrO with 50nm nanoparticle size 2 Modified with 25wt.% (TiO 2 +B 2 O 3 ) The mixed powder was weighed and mixed according to the mass ratio, placed in a zirconia ball milling tank, and ball-milled for 1...

Embodiment 2

[0059] By mass ratio, nano-TiO 2 Powder: Nano B 2 O 3 Powder = 1.30:1, with nano-TiO 2 Powder (TiO 2 particle size of 300nm) and nano-B 2 O 3 powder (B 2 O 3 The particle size is 300nm);

[0060] Then press the assigned B 2 O 3 Powder and TiO 2 The ratio of total powder mass to carbohydrate mass is 1:9 to prepare sucrose powder (the particle size of sucrose powder is 500nm);

[0061] Then the prepared TiO 2 powder, B 2 O 3 The powder and sucrose powder were ground and mixed uniformly, and the temperature was raised to 350 °C in an argon atmosphere, kept for 4 h, and carbon-coated pretreatment was performed to obtain a carbon-coated modified (TiO 2 +B 2 O 3 ) mixed powder. 80.0wt.% ZrO with 100nm nanoparticle size 2 Modified with 20.0 wt.% (TiO 2 +B 2 O 3 ) The mixed powder is weighed and mixed according to the mass ratio, placed in a zirconia ball milling tank, and ball-milled for 24 hours with anhydrous ethanol as a solvent. Dry the slurry obtained by ba...

Embodiment 3

[0064] By mass ratio, nano-TiO 2 Powder: Nano B 2 O 3 Powder = 1.30:1, with nano-TiO 2 Powder (TiO 2 particle size of 500nm) and nano-B 2 O 3 powder (B 2 O 3 The particle size is 500nm);

[0065] Then press the assigned B 2 O 3 Powder and TiO 2 The ratio of total powder mass to carbohydrate mass is 1:10 to prepare glucose powder (the particle size of glucose powder is 700nm);

[0066] Then the prepared TiO 2 powder, B 2 O 3 The powder and glucose powder were ground and mixed, and the temperature was raised to 500 °C in an argon atmosphere, kept for 5 h, and carbon-coated pretreatment was performed to obtain a carbon-coated modified (TiO 2 +B 2 O 3 ) mixed powder. 90.0wt.% ZrO with 300nm nanoparticle size2 Modified with 10.0wt.% (TiO 2 +B 2 O 3 ) The mixed powder is weighed and mixed according to the mass ratio, placed in a zirconia ball milling tank, and ball-milled for 24 hours with anhydrous ethanol as a solvent. Dry the slurry obtained by ball milling, ...

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Abstract

The invention relates to zirconium oxide composite ceramic and a preparation method thereof, particularly relates to high-toughness and high-hardness composite ceramic and a preparation method thereof and belongs to the technical field of composite ceramic. The zirconium oxide composite ceramic comprises the following components in percentage by mass: 90.0-96.5% of ZrO2, 3.0-9.5% of TiB2 and less than or equal to 1% of other unavoidable impurities. By virtue of the method in which coating the surfaces of nano-TiO2 powder and nano-B2O3 powder with a layer of carbon and in situ synthesizing TiB2, the zirconium oxide composite ceramic with high toughness and high hardness is obtained. The preparation process is simple and the obtained high-hardness zirconium oxide composite ceramic can be used in partial application field of hard alloys and has broad application development prospects.

Description

technical field [0001] The invention relates to a zirconia composite ceramic and a preparation method thereof, in particular to a high-strength, tough, high-hardness zirconia composite ceramic and a preparation method thereof; it belongs to the technical field of composite ceramics. Background technique [0002] As a new type of high-tech ceramics, zirconia ceramics have the properties of high strength, high fracture toughness, high hardness, excellent thermal insulation performance and high temperature resistance, and are widely used in the field of structural ceramics and functional ceramics. In addition, zirconia is non-magnetic, non-conductive, non-rusting and wear-resistant, and it is also widely used in the field of biomedical equipment, props and tools. Recently, partially stabilized zirconia (TZP) can be used to prepare magnetically shielded watch cases, corrosion-resistant watch parts and other instrument parts by powder metallurgy methods. In addition to the above...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): C04B35/48C04B35/622
CPCC04B35/48C04B35/622C04B2235/3244
Inventor 周宏明姜桂贾洋夏庆路
Owner CENT SOUTH UNIV
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