Zirconium oxide composite ceramic and preparation method thereof

A technology of composite ceramics and zirconia, which is applied in the fields of high hardness zirconia composite ceramics and its preparation, 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. , Excellent strength and toughness

Active Publication Date: 2015-01-07
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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  • Zirconium oxide composite ceramic and preparation method thereof
  • Zirconium oxide composite ceramic and preparation method thereof

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0054] According to mass ratio, nano TiO 2 Powder: Nano B 2 o 3 Powder = 1.20:1, with nano-TiO 2 Powder (TiO 2 The particle size is 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 the total powder mass to the 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 TiO 2 powder, B 2 o 3 Powder and sucrose powder were ground and mixed, heated to 200°C under an argon atmosphere, kept for 3 hours, and carbon-coated pretreatment was performed to obtain carbon-coated modified (TiO 2 +B 2 o 3 ) mixed powder. 75.0wt.% ZrO with 50nm nanometer particle size 2 With 25wt.% modification (TiO 2 +B 2 o 3 ) The mixed powder is weighed and mixed according to the mass ratio, put into a zirconia ball mill jar, and use absolute ethanol as a solvent, and ball mill for 12 hours...

Embodiment 2

[0059] According to mass ratio, nano TiO 2 Powder: Nano B 2 o 3 Powder = 1.30:1, with nano-TiO 2 Powder (TiO 2 The particle size is 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 the total powder mass to the carbohydrate mass is 1:9 to prepare sucrose powder (the particle size of sucrose powder is 500nm);

[0061] Then the TiO 2 powder, B 2 o 3 Powder and sucrose powder were ground and mixed, heated to 350°C under an argon atmosphere, kept for 4 hours, and carbon-coated pretreatment was carried out to obtain carbon-coated modified (TiO 2 +B 2 o 3 ) mixed powder. 80.0wt.% ZrO with 100nm nanometer particle size 2 With 20.0wt.% modification (TiO 2 +B 2 o 3 ) The mixed powder is weighed and mixed according to the mass ratio, put into a zirconia ball mill jar, and use absolute ethanol as a solvent, and ball mill for 24 hours. Dry the slurry obtained by ball milling, pa...

Embodiment 3

[0064] According to mass ratio, nano TiO 2 Powder: Nano B 2 o 3 Powder = 1.30:1, with nano-TiO 2 Powder (TiO 2 The particle size is 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 the total powder mass to the carbohydrate mass is 1:10 to prepare glucose powder (the particle size of glucose powder is 700nm);

[0066] Then the TiO 2 powder, B 2 o 3 Powder and glucose powder were ground and mixed, heated to 500°C under an argon atmosphere, kept for 5 hours, and carbon-coated pretreatment was performed to obtain carbon-coated modified (TiO 2 +B 2 o 3 ) mixed powder. 90.0wt.% ZrO with a particle size of 300nm2 With 10.0wt.% modification (TiO 2 +B 2 o 3 ) The mixed powder is weighed and mixed according to the mass ratio, put into a zirconia ball mill jar, and use absolute ethanol as a solvent, and ball mill for 24 hours. Dry the slurry obtained by ball milling, pass throu...

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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, high-hardness zirconia composite ceramic and a preparation method thereof; belonging to the technical field of composite ceramics. Background technique [0002] As a new type of high-tech ceramics, zirconia ceramics have properties such as high strength, high fracture toughness, high hardness, excellent heat insulation performance and high temperature resistance, and are widely used in the fields of structural ceramics and functional ceramics. In addition, zirconia is non-magnetic, non-conductive, non-rusting, and wear-resistant. 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. In addition to the above applications, TZP ...

Claims

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Application Information

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Patent Type & Authority Applications(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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