High-entropy carbide ceramic nano-powder as well as preparation method and application thereof

A nano-powder and carbide technology, applied in the field of high-entropy powder materials, can solve the problems of high oxygen impurity content, large powder particle size, uneven element distribution, etc., and achieve low oxygen impurity content, low equipment requirements, The effect of uniform distribution of metal elements

Active Publication Date: 2021-11-09
SOUTH CHINA UNIV OF TECH
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  • Summary
  • Abstract
  • Description
  • Claims
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Problems solved by technology

However, the existing high-entropy carbide ceramics generally have defects such as large particle size, unev

Method used

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  • High-entropy carbide ceramic nano-powder as well as preparation method and application thereof
  • High-entropy carbide ceramic nano-powder as well as preparation method and application thereof

Examples

Experimental program
Comparison scheme
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Example Embodiment

[0036] Example 1:

[0037] A high entropy carbon chemical ceramic nanofin, the preparation method thereof includes the following steps:

[0038] 1) 5.93 g of Cr 2 O 3 Powder, 6.16g Tio 2 Powder, 17.23g TA 2 O 5 Powder, 10.37 g of NB 2 O 5 Powder, 3.94 g of toner powder and 24.98 g of magnesium powder were added to the agate mortar, handmade for 60 min, then add 26.20 g of NAF, hand-grinding 60 min, and prechapsed under pressure at 40 MPa to obtain a mixed powder. Tablets;

[0039] 2) When the mixed powder table is placed in the tube furnace, the tube furnace is pulled out to make the vacuum pressure gauge value to -0.05MPa, and the vacuum table indicates whether the vacuum table indicates whether it is changed. The change shows that the system is complete. This process repeats six times, and argon is transferred to normal pressure. The flow rate of argon during the entire process is maintained at 100 Sccm, and then the resulting product was washed with deionized water at 70 ° C, f...

Example Embodiment

[0041] Example 2:

[0042] A high entropy carbon chemical ceramic nanofin, the preparation method thereof includes the following steps:

[0043] 1) Take 9.61g Zro 2 Powder, 6.16g Tio 2 Powder, 17.23g TA 2 O 5 Powder, 10.37 g of NB 2 O 5 Powder, 3.94 g of toner powder and 27.30 g of magnesium powder were added to the agate mortar, handmade for 45min, then add 35.37 g of NAF, hand-grinding 45min, pre-pressing it at 30 MPa pressure, resulting in a mixed powder Tablets;

[0044]2) When the mixed powder table is placed in the tube furnace, the tube furnace is pulled out to make the vacuum pressure gauge value to -0.05MPa, and the vacuum table indicates whether the vacuum table indicates whether it is changed. The change indicates that the system is complete. This process is repeated six times, and argon is transferred to normal pressure. The flow rate of argon during the entire process was maintained at 200 sccm, and then the resulting product was washed with deionized water at 80 ° C ...

Example Embodiment

[0048] Example 3:

[0049] A high entropy carbon chemical ceramic nanofin, the preparation method thereof includes the following steps:

[0050] 1) Take 9.61g Zro 2 Powder, 5.93 g of Cr 2 O 3 Powder, 17.23g TA 2 O 5 Powder, 10.37 g of NB 2 O 5 Powder, 3.94 g of toner and 26.59 g of magnesium powder were added to the agate mortar, hand-made 30 min, then add 44.54 g of NAF, hand-grinding 30 min, and prechapsed at 20 MPa pressure, resulting in a mixed powder Tablets;

[0051] 2) When the mixed powder table is placed in the tube furnace, the tube furnace is pulled out to make the vacuum pressure gauge value to -0.05MPa, and the vacuum table indicates whether the vacuum table indicates whether it is changed. The change indicates that the system is complete. This process repeats six times, and then argon to normal pressure, and then temperature rises from the chamber from the room to 1050 ° C, heat insulation for 6 min, and then naturally cooled to room temperature The flow rate of argo...

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Abstract

The invention discloses high-entropy carbide ceramic nano-powder as well as a preparation method and application thereof. The high-entropy carbide ceramic nano-powder is prepared by pre-pressing metal oxide powder, carbon powder, magnesium powder and NaF into sheets, sintering, washing with water and pickling, wherein the metal oxide powder is prepared from at least four of ZrO2, TiO2, Ta2O5, Nb2O5 and Cr2O3 according to an equal molar ratio. The high-entropy carbide ceramic nano-powder is small in particle size, uniform in metal element distribution and low in oxygen impurity content, and the preparation method of the high-entropy carbide ceramic nano-powder has the advantages of being easy to operate, low in operation temperature, short in reaction time, low in equipment requirement and the like, and is suitable for large-scale industrial production.

Description

technical field [0001] The invention relates to the technical field of high-entropy powder materials, in particular to a high-entropy carbide ceramic nano-powder and its preparation method and application. Background technique [0002] The concept of high-entropy alloys was first proposed by Professor Ye Junwei in 2004. With the development of later research, high-entropy alloys are defined as composed of no less than four main elements and the mass percentage of each component element is 5%~ New alloys in the range of 35%. Inspired by the concept of high-entropy alloys, the concept of high-entropy has also been extended to the field of ceramic materials. High-entropy ceramic materials have attracted much attention in recent years due to their unique properties and huge space for regulating elemental composition. [0003] At present, the reported high-entropy ceramic materials mainly include high-entropy oxides, high-entropy borides, high-entropy carbides, and high-entropy...

Claims

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Application Information

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IPC IPC(8): C04B35/56C04B35/622C04B35/65
CPCC04B35/5607C04B35/622C04B35/65C04B2235/6562C04B2235/6567C04B2235/95
Inventor 褚衍辉韩杨洁刘红华
Owner SOUTH CHINA UNIV OF TECH
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