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Method for synthesizing spinel type high-entropy oxide material (MCoFeCrMn)3O4 by hydrothermal method

A spinel-type, hydrothermal technology, applied in the field of infrared heating and solar energy absorption, can solve the problem that high-entropy oxide materials have not been retrieved, and achieve the effects of alleviating the energy crisis, mild reaction conditions and low cost

Active Publication Date: 2021-10-15
LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

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 annealing treatment technology

Method used

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  • Method for synthesizing spinel type high-entropy oxide material (MCoFeCrMn)3O4 by hydrothermal method
  • Method for synthesizing spinel type high-entropy oxide material (MCoFeCrMn)3O4 by hydrothermal method
  • Method for synthesizing spinel type high-entropy oxide material (MCoFeCrMn)3O4 by hydrothermal method

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Experimental program
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Effect test

Embodiment 1

[0027] Embodiment 1, (NiCoFeCrMn) 3 o 4 Preparation and properties of high-entropy oxides

[0028]Weigh 1.7563 g (0.006 mol) of nickel nitrate, 1.7457 g (0.006 mol) of cobalt nitrate, 2.4243 g (0.006 mol) of iron nitrate, 2.4539 g (0.006 mol) of chromium nitrate and 2.1653 g (0.006 mol) of manganese nitrate, and dissolve them in Stir evenly in 12mL ultrapure water, mix the five metal salt solutions and continue to stir until completely mixed to obtain a mixed solution of metal nitrate; then weigh 2.5438g (0.024 mol) of sodium carbonate, add it to the above mixed solution and stir evenly; Then the mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor, placed in a blast oven at 150 °C for 4 h, and then cooled to room temperature; the reaction solution was filtered under reduced pressure and washed 5 times with ultrapure water, The precipitate was separated by suction filtration and dried to obtain a solid powder; finally, the obtained solid ...

Embodiment 2

[0030] Embodiment 2, (NiCoFeCrMn) 3 o 4 Preparation and properties of high-entropy oxides

[0031] Weigh 1.7563 g (0.006 mol) of nickel nitrate, 1.7457 g (0.006 mol) of cobalt nitrate, 2.4243 g (0.006 mol) of ferric nitrate, 2.4539 g (0.006 mol) of chromium nitrate and 2.1653 g (0.006 mol) of manganese nitrate were dissolved in 60mL Stir evenly in ultrapure water, mix the five metal salt solutions and continue to stir until completely mixed to obtain a mixed solution of metal nitrate; then weigh 1.2719 g of sodium carbonate (0.012 mol) and add it to the above mixed solution and stir evenly; then The above mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel reaction kettle and placed in a blast oven at 120°C for heat preservation for 1 h; after cooling to room temperature, the reaction solution was filtered under reduced pressure and washed with ultrapure water for 3 times, and then separated by suction filtration. Precipitate and dry to obtain s...

Embodiment 3

[0033] Embodiment 3, (NiCoFeCrMn) 3 o 4 Preparation and properties of high-entropy oxides

[0034] Weigh 1.7563 g (0.006 mol) of nickel nitrate, 1.7457 g (0.006 mol) of cobalt nitrate, 2.4243 g (0.006 mol) of iron nitrate, 2.4539 g (0.006 mol) of chromium nitrate and 2.1653 g (0.006 mol) of manganese nitrate were dissolved in 10mL Stir evenly in ultrapure water, mix the five metal salt solutions and continue to stir until completely mixed to obtain a mixed solution of metal nitrate; then weigh 3.8156 g (0.036 mol) of sodium carbonate and add it to the above mixed solution and stir evenly; then The above mixed solution was transferred to a polytetrafluoroethylene-lined stainless steel reactor and placed in a blast oven at 180 °C for heat preservation for 7 hours. After cooling to room temperature, the reaction solution was filtered under reduced pressure and washed 7 times with ultrapure water, and separated by suction filtration. Precipitate and dry to obtain a solid powder;...

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Abstract

The invention provides a method for synthesizing a spinel type high-entropy oxide material (MCoFeCrMn)3O4 by a hydrothermal method. The method comprises the steps: fully dissolving nickel nitrate or / and copper nitrate, cobalt nitrate, ferric nitrate, chromic nitrate and manganous nitrate in ultrapure water in an equimolar manner to obtain a mixed solution of metal salts; and adding a precipitant into the mixed solution, 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 on a reaction solution, washing with ultrapure water, carrying out suction filtration, separating, precipitating and drying, and carrying out crystallization treatment on obtained solid powder to obtain the high-entropy oxide (MCoFeCrMn)3O4, wherein M is Ni or / and Cu. The high-entropy oxide is of a spinel structure, has high infrared emissivity at the wave band of 3-12 microns, can be suitable for infrared heating, has high light absorptivity at the wave band of 0.3-2.5 microns, and can be suitable for solar energy absorption.

Description

Technical field [0001] The invention relates to a spinel-type high-entropy oxide material (MCoFeCrMn) with infrared radiation and light absorption properties. 3 O 4 method, particularly involving a hydrothermal method for preparing spinel-type high-entropy oxide materials (MCoFeCrMn) 3 O 4 (where M=Ni or / and Cu) method, which belongs to ceramic materials and is used in fields such as infrared heating and solar energy absorption. Background technique [0002] High-entropy oxide materials are a new type of ceramic material developed on the basis of high-entropy alloys. They have attracted widespread attention from researchers due to their unique structural characteristics and functionally controllable properties. High-entropy alloy is an advanced material with a stable phase structure driven by configurational entropy (FCC, BCC, etc.) composed of five or more metal elements. It has thermodynamic high-entropy effect and structural lattice distortion. effect, slow diffusion ...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/26C04B35/626
CPCC04B35/265C04B35/626C04B2235/3275C04B2235/3241C04B2235/3262C04B2235/3279C04B2235/3281C04B2235/763
Inventor 高祥虎金鹏霞刘刚何成玉刘宝华
Owner LANZHOU INST OF CHEM PHYSICS CHINESE ACAD OF SCI
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