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The method for preparing high-entropy oxide ceramic material is simple and low in consumption

A technology of oxide ceramics and ceramic raw materials, which is applied in the field of simple and low-consumption preparation of high-entropy oxide ceramic materials, which can solve the problems of coarse ceramic grains, high sintering temperature, and long sintering time, so as to increase the diffusion rate and reduce the sintering rate. The effect of short temperature and sintering time

Active Publication Date: 2021-04-30
TAIYUAN UNIV OF TECH
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

[0006] The purpose of the present invention is to provide a simple and low-consumption method for preparing high-entropy oxide ceramic materials, so as to solve the problems of high sintering temperature, long sintering time, coarse ceramic grains and low density in the existing high-entropy ceramic preparation methods The problem

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  • The method for preparing high-entropy oxide ceramic material is simple and low in consumption
  • The method for preparing high-entropy oxide ceramic material is simple and low in consumption
  • The method for preparing high-entropy oxide ceramic material is simple and low in consumption

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Embodiment 1

[0041] Embodiment 1: spinel structure (chemical general formula M 3 o 4 , M is a metal element) the preparation method of high-entropy oxide ceramic material comprises the steps:

[0042] (1) Weigh raw materials: Weigh the following various oxide powders of equal metal atoms (0.03mol): cobalt tetroxide, 2.4080g; dichromium oxide, 2.2798g; ferric oxide, 2.3154g; manganese oxide, 2.1281g ; Nickel oxide, 2.2408g, 11.3721g in total;

[0043] (2) Particle refinement: Add 11.3721g of raw material powder and 95g of deionized water into the ball mill tank of the planetary ball mill. The mixed slurry is dried in a blast drying oven, followed by grinding to obtain a fine powder;

[0044] (3) Discharge plasma treatment: under vacuum conditions, take 3g of fine powder and add it to the ball milling tank of the discharge plasma ball mill, and turn on the discharge plasma ball mill to perform discharge plasma activation pretreatment on the ball milling beads and the inner wall of the bal...

Embodiment 2

[0050] Embodiment 2: perovskite structure (chemical general formula: ABO 3 , wherein, the A site is lanthanum, and the B site is composed of metal element doping contained in the other five oxides of this embodiment. What is prepared in this embodiment is La(Co 0.2 Cr 0.2 Fe 0.2 mn 0.2 Ni 0.2 )O 3 ) A method for preparing high-entropy oxide ceramics, comprising the steps of:

[0051] (1) Weigh raw materials: Weigh various oxide powders of B-site doping elements such as metal atoms, cobalt oxide, 1.1240g; dichromium oxide, 1.1399g; ferric oxide, 1.1977g; manganese dioxide , 1.3041g; nickel oxide, 1.1204g; then weigh lanthanum hydroxide, the raw material of the A-site element, 14.2429g; a total of 20.1290g;

[0052] (2) Particle refinement: Add 20.1290g of the original powder and 109g of raw ethanol into the ball mill tank of the planetary ball mill, the ball-to-material ratio is 8:1, the speed is 300r / min, the ball milling time is 6 hours, and it is prepared by planetary ...

Embodiment 3

[0059] Embodiment 3: the preparation method of sodium chloride structure (chemical general formula is MO, wherein M is metal element) high-entropy oxide ceramic material, comprises the steps:

[0060] (1) Weigh raw materials: Weigh the following various oxide powders such as metal atoms: magnesium oxide, 1.0077g; cobalt oxide, 1.8733g; nickel oxide, 1.8673g; copper oxide, 1.9887g; 8.7715g;

[0061] (2) Particle refinement: Add 8.7715g of raw material powder and 88g of deionized water into the ball mill tank, the ball-to-material ratio is 3:1, the speed is 350r / min, the ball milling time is 8h, and a uniformly mixed slurry is prepared by planetary ball milling , drying the above slurry in a blast drying oven, followed by grinding to obtain a fine powder;

[0062] (3) Discharge plasma treatment: get 3.5g of refined powder and add it to the ball milling tank of the discharge plasma ball mill, turn on the discharge plasma ball mill to carry out discharge plasma activation pretrea...

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Abstract

The invention relates to the technical field of high-entropy ceramic preparation, and discloses a simple and low-consumption method for preparing a high-entropy oxide ceramic material, which comprises the following steps: S1, weighing raw materials: weighing the raw materials required for preparation according to a set ratio; s2, performing particle refinement: adding the raw materials weighed in the step S1 and a dispersing agent into a ball milling tank of a planetary ball mill together for particle refinement grinding to prepare uniformly mixed slurry, then drying the slurry, and grinding again to obtain refined powder; s3, performing spark plasma treatment: performing spark plasma activation on the refined powder obtained in the step S2 to obtain a ceramic raw material; and S4, performing microwave sintering: carrying out microwave sintering on the ceramic raw material obtained in the step S3 to obtain the high-entropy oxide ceramic material.

Description

technical field [0001] The invention relates to the technical field of preparation of high-entropy ceramic materials, in particular to a method for preparing high-entropy oxide ceramic materials with simple and low consumption. Background technique [0002] High-entropy ceramics usually refer to single-phase solid solutions formed by five or more elements, and have aroused the interest of many researchers because of their unique "high-entropy" effect. Among them, high-entropy oxides are rich in crystal structures, including sodium chloride structure, spinel structure, perovskite structure and fluorite structure, etc. They have different properties and have excellent properties higher than single-phase components. Research hotspots. The preparation methods of high-entropy oxide ceramics are various, mainly divided into two categories: solid-phase method and liquid-phase method. [0003] In the liquid phase method, the nitrates (or other salts) of the five elements are usual...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/01C04B35/622C04B35/626C04B35/64C04B35/50C04B35/453
CPCC04B35/01C04B35/622C04B35/62615C04B35/64C04B35/50C04B35/453C04B2235/3206C04B2235/3275C04B2235/3277C04B2235/3279C04B2235/3281C04B2235/3284C04B2235/3241C04B2235/3272C04B2235/3262C04B2235/3267C04B2235/3227C04B2235/3244C04B2235/3229C04B2235/3232C04B2235/3293C04B2235/3215C04B2235/3213C04B2235/3203C04B2235/667C04B2235/77
Inventor 苗洋张丰年成楚飞程富豪高峰
Owner TAIYUAN UNIV OF TECH
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