Unlock instant, AI-driven research and patent intelligence for your innovation.

Medium-entropy MAX phase material, medium-entropy two-dimensional material and preparation method and application thereof

A technology of two-dimensional materials and raw materials, applied in chemical instruments and methods, inorganic chemistry, nanotechnology, etc.

Active Publication Date: 2022-07-15
BEIHANG UNIV
View PDF5 Cites 0 Cited by
  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

[0006] The present invention aims at the technical problem that it is difficult to synthesize medium-entropy materials with a single phase structure. The first aspect provides a medium-entropy MAX phase material. The chemical general formula of the medium-entropy MAX-phase material is M n+1 AX n , consisting of M element, A element and X element, wherein, M element is selected from three or four elements in transition metal elements and lanthanide elements, and M element contains at least two elements capable of forming a solid solution; wherein, A The element is selected from at least one of the elements of group VIIB, VIII, IB, IIB, IIIA, IVA, VA and VIA; the element X is at least one of carbon, nitrogen, boron or oxygen; n is 1, 2, 3, 4, 5 or 6

Method used

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View more

Image

Smart Image Click on the blue labels to locate them in the text.
Viewing Examples
Smart Image
  • Medium-entropy MAX phase material, medium-entropy two-dimensional material and preparation method and application thereof
  • Medium-entropy MAX phase material, medium-entropy two-dimensional material and preparation method and application thereof
  • Medium-entropy MAX phase material, medium-entropy two-dimensional material and preparation method and application thereof

Examples

Experimental program
Comparison scheme
Effect test

preparation example Construction

[0055] The present invention also provides a method for preparing a medium-entropy MAX phase material, comprising the steps of:

[0056] Batching step: determine the required amount of raw materials containing the element according to the stoichiometric ratio of each element in the general chemical formula of the MAX phase material;

[0057] Sintering step: sintering the raw material at a predetermined temperature under a protective atmosphere or a vacuum environment to obtain a medium-entropy MAX phase material; wherein,

[0058] The general chemical formula of the MAX phase material is M n+1 AX n , M element is selected from three or four transition metal elements and lanthanide elements, M element contains at least two transition metal elements and lanthanide elements that can form solid solutions; A element is selected from VIIB, VIII, IB, IIB, IIIA , at least one of Group IVA, VA and VIA elements; X element is at least one of carbon, nitrogen, boron and oxygen elements,...

Embodiment 1-1

[0075] This embodiment provides a medium-entropy MAX phase material, the general chemical formula of which is M n+1 AX n , M element is selected from three or four transition metal elements and lanthanide elements, wherein, M element contains at least two transition metal elements or lanthanide elements that can form a solid solution; A is selected from VIIB, VIII, IB, IIB , at least one of group IIIA, IVA, VA and VIA elements; X is at least one of carbon, nitrogen, boron or oxygen, and n is 1, 2, 3, 4, 5 or 6, corresponding to "211" respectively Configuration, "312" configuration, "413" configuration, "514" configuration, "615" configuration and "716" configuration MAX phase.

[0076] Wherein, M transition metal elements are selected from IIIB, IVB, VB, VIB, VIIB, VIII, IB, IIB group elements, generally, M elements include but are not limited to: scandium (Sc), yttrium (Y), titanium (Ti) ), zirconium (Zr), hafnium (Hf), vanadium (V), niobium (Nb), tantalum (Ta), chromium (C...

Embodiment 1-2

[0084] The present embodiment provides a method for preparing a medium-entropy MAX phase material, comprising the steps of:

[0085] Batching step: determine the required amount of raw materials containing the element according to the stoichiometric ratio of each element in the general chemical formula of the MAX phase material;

[0086] Sintering step: sintering the weighed raw materials at a predetermined temperature under a protective atmosphere or a vacuum environment to obtain a medium-entropy MAX phase material; wherein, the M element in the MAX phase material is three or four transition metal elements and lanthanide elements , wherein the M element contains at least two transition metal elements or lanthanide elements that can form a solid solution; the A element is at least one selected from the group VIIB, VIII, IB, IIB, IIIA, IVA, VA and VIA elements; The X element is at least one of carbon, nitrogen, boron or oxygen, and n is 1, 2, 3, 4, 5 or 6.

[0087] Under the ...

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

PUM

PropertyMeasurementUnit
thicknessaaaaaaaaaa
particle diameteraaaaaaaaaa
particle diameteraaaaaaaaaa
Login to View More

Abstract

The invention discloses a medium-entropy MAX phase material and a medium-entropy two-dimensional material as well as a preparation method and application thereof, the chemical general formula of the medium-entropy MAX phase material is Mn + 1AXn, and the medium-entropy MAX phase material is characterized in that the element M is selected from three or four of transition metal elements and lanthanide elements, and the element A is selected from at least one of VIIB, VIII, IB, IIB, IIIA, IVA, VA and VIA family elements; x is at least one of carbon, nitrogen, boron or oxygen, and n is 1, 2, 3, 4, 5 or 6. The medium-entropy two-dimensional material can be obtained after the component A in the medium-entropy MAX phase material is etched, and the medium-entropy MAX phase material and the medium-entropy two-dimensional material which can stably exist in a single phase are prepared by introducing the multi-component transition metal capable of achieving solid solution, inducing the structure to generate lattice distortion and optimizing the electronic structure.

Description

[0001] This application requires that the application number is 202110023870.0 and the name of the invention is "medium-entropy MAX phase material, medium-entropy two-dimensional material and its preparation method" submitted to the China Patent Office on January 8, 2021. The content of this application is incorporated herein by reference invention. technical field [0002] The invention relates to the field of new materials, in particular to a medium-entropy MAX phase material and a medium-entropy two-dimensional material and a preparation method and application thereof. Background technique [0003] The MXene two-dimensional material is obtained by selectively etching the A component from the MAX phase. The earliest reported method of etching the MAX phase to obtain MXene is hydrofluoric acid. Hydrofluoric acid is used to etch Ti. 3 AlC 2 Etched MXene Ti 3 C 2 . Due to the high toxicity, corrosiveness and environmental hazards of hydrofluoric acid, the researchers deve...

Claims

the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More

Application Information

Patent Timeline
no application Login to View More
Patent Type & Authority Applications(China)
IPC IPC(8): C04B35/56C04B35/622C01B32/90B82Y40/00
CPCC04B35/5607C04B35/622C01B32/90B82Y40/00C04B2235/425C04B2235/402C04B2235/404C04B2235/405C04B2235/656C04B2235/6567C01P2004/64C01P2004/24Y02E60/10
Inventor 杨树斌杜志国
Owner BEIHANG UNIV