Eutectic high-entropy oxide powder material and preparation method thereof

A technology of oxide powder and bulk material is applied in the field of dual-phase Mnx1-xO high-entropy oxide material and its preparation, and eutectic high-entropy oxide powder material, which can solve the problem of not finding eutectic high-entropy oxide and so on. , to achieve uniform product composition and microstructure, controllable grain size, and controllable specific surface area.

Active Publication Date: 2019-12-03
ANHUI UNIVERSITY OF TECHNOLOGY
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  • Abstract
  • Description
  • Claims
  • Application Information

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Problems solved by technology

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  • Eutectic high-entropy oxide powder material and preparation method thereof
  • Eutectic high-entropy oxide powder material and preparation method thereof
  • Eutectic high-entropy oxide powder material and preparation method thereof

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Embodiment 1

[0025] A kind of eutectic high-entropy oxide powder of the present invention is prepared by solution combustion method, and its chemical composition is [Mn 0.5 (CoMgNiZn) 0.5 ] O: take by weighing the corresponding metal nitrate according to the stoichiometric ratio of the molecular formula, specifically: 2.870g of Mn(NO 3 ) 2 ·6H 2 O, 2.910g of Co(NO 3 ) 2 ·6H 2 O, 2.564g of Mg(NO 3 ) 2 ·6H 2 O, 2.908g of Ni(NO 3 ) 2 ·6H 2 O and 2.975g of Zn(NO 3 ) 2 ·6H 2 O, dissolved in 10mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing five metal cations; then weighed 7.507g glycine and added to the mixed solution, stirred evenly to obtain a transparent sol; then put the above transparent sol Dry in an oven at 850°C to obtain a viscous gel after evaporating water; finally put the above gel in a muffle furnace and keep it at 900°C for 1 hour to obtain a crystal structure of 37.1% rock-salt phase and spinel Eutectic oxide [Mn 0.5 (C...

Embodiment 2

[0027] A kind of eutectic high-entropy oxide powder of the present invention is prepared by solution combustion method, and its chemical composition is [Mn 0.1 (CoMgNiZn) 0.9 ] O: take by weighing the corresponding metal nitrate according to the stoichiometric ratio of the molecular formula, specifically: 0.287g of Mn(NO 3 ) 2 ·6H 2 O, 2.619g of Co(NO 3 ) 2 ·6H 2 O, 2.308g of Mg(NO 3 ) 2 ·6H 2 O, 2.617g of Ni(NO 3 ) 2 ·6H 2 O and 2.678g of Zn(NO 3 ) 2 ·6H 2 O, dissolved in 4.5mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing five metal cations; then weighed 6.666g of glucose and added to the mixed solution, stirred evenly to obtain a transparent sol; then the above transparent sol Put it in an oven at 100°C to dry, and get a viscous gel after evaporating water; finally, put the above gel in a muffle furnace and keep it at 550°C for 1 hour to obtain a crystal structure of 91.4% rock-salt phase, spinel Eutectic oxide with...

Embodiment 3

[0029] A kind of eutectic high-entropy oxide powder of the present invention is prepared by solution combustion method, and its chemical composition is [Mn 0.7 (CoMgNiZn) 0.3 ]O: Take by weighing the corresponding metal nitrate according to the stoichiometric ratio of the molecular formula, specifically 2.009g of Mn(NO 3 ) 2 ·6H 2 O, 0.873g of Co(NO 3 ) 2 ·6H 2 O, 0.769g of Mg(NO 3 ) 2 ·6H 2 O, 0.872g of Ni(NO 3 ) 2 ·6H 2 O and 0.893g of Zn(NO 3 ) 2 ·6H 2O, dissolved in 2mL distilled water, stirred evenly at room temperature to obtain a mixed solution containing five metal cations; then weighed 1.825g of citric acid and added to the mixed solution, stirred evenly to obtain a transparent sol; then the above transparent sol Put it in an oven at 100°C to dry, and get a viscous gel after evaporating water; finally, put the above gel in a muffle furnace and keep it at 950°C for 1 hour to obtain a crystal structure of 5.9% rock salt phase, spinel Eutectic oxide with 9...

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Abstract

The invention provides an eutectic high-entropy oxide powder material and a preparation method thereof, and belongs to the technical field of high-entropy oxide powder materials. The molecular formulaof the eutectic high-entropy oxide is Mn<x>(CoMgNiZn)<1-x>O (the value of x is 0.1-0.7). The proportion of a rock salt phase and a spinel phase in the eutectic high-entropy oxide is adjusted by changing the proportion of metal cations, so that certain physical and chemical properties are customized, and certain special use requirements are met. Meanwhile, the eutectic high-entropy alloy powder material is prepared by adopting a solution combustion synthesis method with simple reaction process, and liquid-phase material blending is adopted in the preparation process, so that the raw materialsare uniformly mixed at a molecular level, the uniformity of final product composition and microstructures is ensured, and the specific surface area and grain size of the prepared eutectic high-entropyoxide powder material are controllable.

Description

technical field [0001] The invention relates to the technical field of high-entropy oxide powder materials, in particular to a eutectic high-entropy oxide powder material, specifically a dual-phase Mn with rock salt and spinel structures x (CoMgNiZn) 1-x O high entropy oxide materials and methods for their preparation. Background technique [0002] In recent years, material researchers at home and abroad have extended the design concept of high-entropy alloys to the field of high-entropy ceramic materials, and developed a series of high-entropy carbides, high-entropy nitrides, high-entropy borides, high-entropy sulfides and high-entropy Silicide and other new ceramic materials. In 2015, a new material called high-entropy oxides (HEOs) has extremely high stability due to the disordered distribution of atoms. Since its inception, because of its unique properties, Such as extremely high thermal stability, unique magnetic properties, efficient lithium ion storage performance,...

Claims

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Application Information

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IPC IPC(8): C04B35/453C04B35/626
CPCC04B35/453C04B35/62605C04B2235/3206C04B2235/3262C04B2235/3275C04B2235/3279C04B2235/443C04B2235/781
Inventor 冒爱琴谢鸿翔项厚政俞海云郑翠红林娜
Owner ANHUI UNIVERSITY OF TECHNOLOGY
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