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Method for preparing high-entropy oxide material (MAlFeCuMg)3O4 by hydrothermal method

An oxide and hydrothermal technology, applied in the field of ceramic materials and infrared heating, can solve the problem that high-entropy oxide materials have not been retrieved, and achieve the effects of low cost, mild reaction conditions and high infrared emissivity

Active Publication Date: 2021-10-01
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI +1
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

At present, there are no relevant reports on the preparation of high-entropy oxide materials by one-step hydrothermal method combined with crystallization treatment technology

Method used

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  • Method for preparing high-entropy oxide material (MAlFeCuMg)3O4 by hydrothermal method
  • Method for preparing high-entropy oxide material (MAlFeCuMg)3O4 by hydrothermal method
  • Method for preparing high-entropy oxide material (MAlFeCuMg)3O4 by hydrothermal method

Examples

Experimental program
Comparison scheme
Effect test

Embodiment 1

[0026] Embodiment 1, (CoAlFeCuMg) 3 o 4 Preparation and properties of high-entropy oxides

[0027] Weigh Co(NO 3 ) 2 ·6H 2 O 1.7484 g (0.006 mol), Al(NO 3 ) 3 9H 2 O 2.2588 g (0.006mol), Fe(NO 3 ) 3 9H 2 O 2.4283 g (0.006 mol), Cu(NO 3 ) 2 ·6H 2 O 1.4513 g (0.006 mol) and Mg(NO 3 ) 2 ·6H 2 O 1.5465 g (0.006 mol), were dissolved in 12 mL of ultrapure water and stirred evenly, and the five metal salt solutions were mixed and kept stirring until completely mixed to obtain a mixed solution of metal nitrate; then weighed 8.0701 g (0.024 mol ) of disodium edetate into the above mixed solution and stirred evenly; then the mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor and placed in a blast oven at 120°C for 1 h, then cooled to room temperature Finally, the reaction solution was filtered under reduced pressure and washed three times with ultrapure water, the precipitate was separated by suction filtration, and dried to obtain ...

Embodiment 2

[0028] Embodiment 2, (CoAlFeCuMg) 3 o 4 Preparation and properties of high-entropy oxides

[0029] Weigh Co(NO 3 ) 2 ·6H 2 O 1.7484 g (0.006 mol), Al(NO 3 ) 3 9H 2 O 2.2588g (0.006mol), Fe(NO 3 ) 3 · 9H 2 O 2.4283g (0.006 mol), Cu(NO 3 ) 2 ·6H 2 O 1.4513 g (0.006 mol) and Mg(NO 3 ) 2 ·6H 2 O 1.5465 g (0.006 mol), respectively dissolved in 30 mL of ultrapure water and stirred evenly, and the five metal salt solutions were mixed and kept stirring until completely mixed to obtain a mixed solution of metal nitrate; then weighed 6.0517 g (0.018mol ) of disodium edetate) into the above mixed solution and stirred evenly; then the above mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor and placed in a blast oven at 120 °C for 1 h, cooled to After room temperature, the reaction solution was filtered under reduced pressure and washed three times with ultrapure water, the precipitate was separated by suction filtration, and dried to...

Embodiment 3

[0030] Embodiment 3, (CoAlFeCuMg) 3 o 4 Preparation and properties of high-entropy oxides

[0031] Weigh Co(NO 3 ) 2 ·6H 2 O 1.7484 g (0.006 mol), Al(NO 3 ) 3 9H 2 O 2.2588 g (0.006mol), Fe(NO 3 ) 3 · 9H 2 O 2.4283 g (0.006 mol), Cu(NO 3 ) 2 ·6H 2 O 1.4513 g (0.006 mol) and Mg(NO 3 ) 2 ·6H 2 O 1.5465 g (0.006 mol), respectively dissolved in 10 mL of ultrapure water and stirred evenly, and the five metal salt solutions were mixed and kept stirring until completely mixed to obtain a mixed solution of metal nitrate; then weighed 10.0862 g (0.030 mol ) of disodium edetate into the above mixed solution and stirred evenly; then the mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor and placed in a blast oven at 120°C for 1 h, then cooled to room temperature Finally, the reaction solution was filtered under reduced pressure and washed 7 times with ultrapure water, the precipitate was separated by suction filtration, and dried to ...

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Abstract

The invention provides a method for preparing a high-entropy oxide material (MAlFeCuMg)3O4 by a hydrothermal method, which comprises the following steps of: respectively dissolving cobalt nitrate / chromic nitrate, aluminum nitrate, copper nitrate, ferric nitrate and magnesium nitrate in ultrapure water according to equal moles, and fully and uniformly stirring to obtain a mixed solution of metal salt; adding a precipitant into the mixed solution of metal salts, uniformly stirring, transferring into a stainless steel high-pressure reaction kettle with a polytetrafluoroethylene lining, carrying out a hydrothermal reaction, cooling to room temperature after the reaction is finished, carrying out reduced pressure filtration, ultrapure water washing, suction filtration, separation, precipitation and drying on the reaction liquid, and crystallizing the obtained solid powder to obtain the high-entropy oxide (MAlFeCuMg)3O4, wherein M is Co or Cr. The high-entropy oxide is of a spinel structure, has high infrared emissivity at the wave band of 3-12 microns, and can be suitable for infrared heating. The metal salt is used as a raw material and is wide in source and low in cost; a hydrothermal method is adopted, it can be ensured that several metal elements are fully and evenly mixed, and the reaction conditions are mild and environmentally friendly.

Description

technical field [0001] The present invention relates to a high entropy oxide material (MAlFeCuMg) 3 o 4 method, especially a hydrothermal synthesis of high-entropy oxide materials (MAlFeCuMg) 3 o 4 The method belongs to the field of ceramic materials and is applied to fields such as infrared heating. Background technique [0002] In recent years, high-entropy materials, especially high-entropy alloys and high-entropy oxides, have attracted extensive attention from researchers due to their unique structural features and related functional tunable properties. A high-entropy material is an advanced material with a stable phase structure driven by configuration entropy composed of five or more metal elements, and the elements contained are almost equimolar and uniformly distributed to ensure the maximum configuration entropy of the system . In highly disordered multi-component systems, high entropy produces very attractive phenomena, such as lattice distortion effects on st...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/626
CPCC04B35/2625C04B35/2666C04B35/626C04B2235/3275C04B2235/3281C04B2235/3241C04B2235/763
Inventor 高祥虎金鹏霞高峰刘福国刘刚何成玉
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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