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High-entropy zirconate ceramics and production method thereof

A zirconate and ceramic technology, applied in the field of ceramic materials and their preparation, can solve the problems of low density of high-entropy ceramic sintered samples, no high-entropy zirconate ceramics, difficult application of high-entropy ceramics, etc., and achieve great application potential , Excellent material properties, the effect of filling the research gap

Active Publication Date: 2020-01-10
ZHENGZHOU UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0004] At present, the main problems of high-entropy ceramics are the low density of sintered samples, the existence of a second phase, and the inability to prepare bulk materials with pure phases and close to the theoretical density, which makes the performance test deviate, because it cannot truly reflect the intrinsic properties of high-entropy ceramics. , which brings difficulties to the application of high-entropy ceramics
Moreover, there is no relevant report on the preparation of high-entropy zirconate ceramics, which is also a problem that those skilled in the art need to solve urgently

Method used

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  • High-entropy zirconate ceramics and production method thereof
  • High-entropy zirconate ceramics and production method thereof
  • High-entropy zirconate ceramics and production method thereof

Examples

Experimental program
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Effect test

Embodiment 1

[0030] A high-entropy zirconate ceramic with the chemical formula (CaSrBa)ZrO 3 , high-entropy zirconate ceramics (CaSrBa)ZrO 3 Has a single phase structure.

[0031] Preparation of High Entropy Zirconate Ceramics (CaSrBa)ZrO 3 method, including the following steps:

[0032] (1) Three kinds of zirconates CaZrO 3 , SrZrO 3 and BaZrO 3 Powder, according to molar ratio CaZrO 3 : SrZrO 3 : BaZrO 3 =1:1:1 into mixed powder;

[0033] (2) Put the mixed powder mentioned in step (1) into a polytetrafluoroethylene tank, add absolute ethanol and zirconia grinding balls, the mass ratio of balls to materials is 1:1; use a planetary ball mill to mix the materials by wet method , with a rotation speed of 300 r / min and a ball milling time of 4 h to obtain a uniformly mixed suspension;

[0034] (3) Transfer the suspension in step (2) into an eggplant-shaped bottle and fully dry the evenly mixed suspension with a rotary evaporator at a drying temperature of 40-60 o C, the drying time...

Embodiment 2

[0037] A high-entropy zirconate ceramic with the chemical formula (CaSrBa)ZrO 3 , high-entropy zirconate ceramics (CaSrBa)ZrO 3 Has a single phase structure.

[0038] Preparation of High Entropy Zirconate Ceramics (CaSrBa)ZrO 3 method, including the following steps:

[0039] (1) Three kinds of zirconates CaZrO 3 , SrZrO 3 and BaZrO 3 Powder, according to molar ratio CaZrO 3 : SrZrO 3 : BaZrO 3 =1:1:1 into mixed powder;

[0040] (2) Put the mixed powder mentioned in step (1) into a polytetrafluoroethylene tank, add absolute ethanol and zirconia grinding balls, the mass ratio of balls to materials is 1:1; use a planetary ball mill to mix the materials by wet method , with a rotation speed of 300 r / min and a ball milling time of 4 h to obtain a uniformly mixed suspension;

[0041] (3) Transfer the suspension in step (2) into an eggplant-shaped bottle and fully dry the evenly mixed suspension with a rotary evaporator at a drying temperature of 40-60 o C, the drying time...

Embodiment 3

[0044] A high-entropy zirconate ceramic with the chemical formula (CaSrBa)ZrO 3 , high-entropy zirconate ceramics (CaSrBa)ZrO 3 Has a single phase structure.

[0045] Preparation of High Entropy Zirconate Ceramics (CaSrBa)ZrO 3 method, including the following steps:

[0046] (1) Three kinds of zirconates CaZrO 3 , SrZrO 3 and BaZrO 3 Powder, according to molar ratio CaZrO 3 : SrZrO 3 : BaZrO 3 =1:1:1 into mixed powder;

[0047] (2) Put the mixed powder mentioned in step (1) into a polytetrafluoroethylene tank, add absolute ethanol and zirconia grinding balls, the mass ratio of balls to materials is 1:1; use a planetary ball mill to mix the materials by wet method , with a rotation speed of 300 r / min and a ball milling time of 4 h to obtain a uniformly mixed suspension;

[0048] (3) Transfer the suspension in step (2) into an eggplant-shaped bottle and fully dry the uniformly mixed suspension with a rotary evaporator at a drying temperature of 50 o C, drying time 1.5...

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Abstract

The invention relates to high-entropy zirconate ceramics and a production method thereof. The high-entropy zirconate ceramics are of a single-phase structure, and a chemical formula of the high-entropy zirconate ceramics is (CaSrBa)ZrO3. According to the production method of the high-entropy zirconate ceramics, firstly, through planetary ball milling, powder of CaZrO3, SrZrO3 and BaZrO3 is subjected to wet milling and mixing, then an evenly-mixed raw material is fully dried in a rotary evaporator, and finally, the evenly-mixed raw material is sintered respectively to achieve production of high-entropy ceramic blocks. According to the high-entropy zirconate ceramics and the production method thereof, the high-entropy zirconate ceramics (CaSrBa)ZrO3 are synthesized successfully for the firsttime, and it is characterized by multiple technologies that the synthesized high-entropy zirconate ceramics (CaSrBa)ZrO3 have high density and hardness and heat conductivity, which is lower than those of the three raw materials.

Description

technical field [0001] The invention belongs to the technical field of ceramic materials and preparation thereof, and in particular relates to a high-entropy zirconate ceramic and a preparation method thereof. Background technique [0002] In 2004, Yeh et al. broke through the shackles of the traditional alloy system for the first time and proposed the concept of high-entropy alloys, which are multi-principal alloys composed of five or more principal elements in equiatomic ratios or close to equiatomic ratios. The atomic percentage of elements is between 5% and 35%. High-entropy alloys have thermodynamic high-entropy effects, structural lattice distortion effects, dynamic slow diffusion effects, and performance "cocktail" effects. These effects make high-entropy alloys exhibit excellent wear resistance, high Strength, good thermal stability at high temperature, good fracture resistance and so on. [0003] The strategy of designing new alloys has achieved unprecedented succ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/48C04B35/622C04B35/645
CPCC04B35/48C04B35/622C04B35/645C04B2235/602C04B2235/656C04B2235/6562C04B2235/6567C04B2235/77C04B2235/96C04B2235/9607
Inventor 李明亮王海龙张锐周延春邵刚邱帅航朱锦鹏刘雯范冰冰卢红霞许红亮
Owner ZHENGZHOU UNIV
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