High-entropy ceramic with high hardness and high conductivity as well as preparation method and application of high-entropy ceramic

A technology with high conductivity and high hardness, applied in the field of ceramic materials, can solve problems such as insufficient conductivity, and achieve the effects of low cost, wide application range and great application potential

Active Publication Date: 2021-05-11
DONGHUA UNIV +2
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0003] The technical problem to be solved by the present invention is to provide a high-entropy ceramic with high hardness and high conductivity and its preparation method and application, so as to overcome the shortcomings of insufficient electrical conductivity of traditional ceramics and existing boride high-entropy ceramics

Method used

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  • High-entropy ceramic with high hardness and high conductivity as well as preparation method and application of high-entropy ceramic
  • High-entropy ceramic with high hardness and high conductivity as well as preparation method and application of high-entropy ceramic
  • High-entropy ceramic with high hardness and high conductivity as well as preparation method and application of high-entropy ceramic

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0027] The preparation composition is (Dy, Ho, Er, Tm, Lu) B 12 According to the molar mass percentage of the high-entropy ceramics, Dy, Ho, Er, Tm, and Lu each account for 20%, and the balance is B and unavoidable impurities, and the impurity content is less than 0.05%. The preparation of high-entropy ceramics proceeds as follows:

[0028] (1) Dosing is carried out according to the molar mass of the high-entropy ceramic, and the amorphous boron powder is added according to the theoretically calculated 110%.

[0029] (2) the rare earth oxide (Dy 2 o 3 Powder, Ho 2 o 3 Powder, Er 2 o 3 Powder, Tm 2 o 3 Powder, Lu 2 o 3 powder) and the raw materials of amorphous boron powder are placed in the ball mill tank, and ZrO 2 The balls are grinding beads, which are mixed on a ball tank mill at a speed of 120 rpm for 24 hours to obtain a uniform mixed powder; the mass ratio of raw materials to ball milling beads is 1:0.2.

[0030] (3) Place the powder obtained in step (2) in ...

Embodiment 2

[0034] The preparation composition is (Dy, Ho, Er, Tm, Lu) B 12 The high-entropy ceramics, Dy, Ho, Er, Tm, and Lu each account for 20% according to the molar mass percentage, and the balance is B and unavoidable impurities, and the impurity content is less than 0.05. The preparation of high-entropy ceramics proceeds as follows:

[0035] (1) Dosing is carried out according to the molar mass of the high-entropy ceramic, and the amorphous boron powder is added according to the theoretically calculated 110%.

[0036] (2) the rare earth oxide (Dy 2 o 3 Powder, Ho 2 o 3 Powder, Er 2 o 3 Powder, Tm 2 o 3 Powder, Lu 2 o 3 powder) and the raw materials of amorphous boron powder are placed in the ball mill tank, and ZrO 2 The balls are grinding beads, which are mixed on a ball tank mill at a speed of 120 rpm for 24 hours to obtain a uniform mixed powder; the mass ratio of raw materials to ball milling beads is 1:0.2.

[0037] (3) Place the powder obtained in step (2) in a grap...

Embodiment 3

[0041] The preparation composition is (Dy, Ho, Er, Tm, Lu) B 12 The high-entropy ceramics, according to the molar mass percentage a=30%, b=30%, c=20%, d=10% and e=10%, the balance is B and unavoidable impurities, and the impurity content is less than 0.05. The preparation of high-entropy ceramics proceeds as follows:

[0042] (1) Dosing is carried out according to the molar mass of the high-entropy ceramic, and the amorphous boron powder is added according to the theoretically calculated 110%.

[0043] (2) Rare earth oxides (Dy 2 o 3 Powder, Ho 2 o 3 Powder, Er 2 o 3 Powder, Tm 2 o 3 Powder, Lu 2 o 3 powder) and the raw materials of amorphous boron powder are placed in the ball mill tank, and ZrO 2 The balls are grinding beads, which are mixed on a ball tank mill at a speed of 120 rpm for 24 hours to obtain a uniform mixed powder; the mass ratio of raw materials to ball milling beads is 1:0.2.

[0044] (3) Place the powder obtained in step (2) in a graphite mold, a...

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Abstract

The invention relates to high-entropy ceramic with high hardness and high conductivity as well as a preparation method and application of the high-entropy ceramic. The chemical formula of the high-entropy ceramic is (AaBbCcDdEe)B12. The dodecaboride high-entropy ceramic provided by the invention has high hardness and high conductivity, enriches a boride high-entropy ceramic material system, has the advantages of low cost, simplicity, feasibility, wide application range and the like, and has great application potential in the field of electrical equipment bearing high stress and high conductivity.

Description

technical field [0001] The invention belongs to the field of ceramic materials, in particular to a high-entropy ceramic with high hardness and high electrical conductivity, a preparation method and application thereof. Background technique [0002] The currently studied high-entropy ceramics mainly include high-entropy oxides, carbides, nitrides, and borides. Among them, high-entropy boride ceramics have broad development potential in the fields of ultra-high temperature, biomedicine, aerospace and energy due to their high hardness and melting point, good corrosion resistance, biocompatibility, and electrochemical performance. Has been successfully developed (V 0.2 Cr 0.2 Nb 0.2 Ta 0.2 W 0.2 ) B-boride high-entropy ceramics (Mingde Qin, et al.Scripta Materiala 189 (2020) 101-105), (Hf 0.2 Mo 0.2 Nb 0.2 Ta 0.2 Ti 0.2 )B 2 Diboride high-entropy ceramics (Giovanna Tallarita, et al. Scripta Materiala 189 (2020) 100-104), (Hf 0.2 Mo 0.2 Nb 0.2 Ta 0.2 Ti 0.2 )B 6 ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/50C04B35/58
CPCC04B35/50C04B35/5805C04B2235/666C04B2235/6562C04B2235/6567C04B2235/96
Inventor 郑兴伟崔建梁拥成张国军刘吉轩韩志林蔡小芝杜小琪
Owner DONGHUA UNIV
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