Nano-Porous Powder Production via De-Alloying and M-ization
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing methods are limited in preparing nano-porous oxide, nitride, and hydride particles, and there is a need for a feasible and easily-operated method to produce nano-porous powder materials with broad applications.
Innovation Solution
A method involving ultrasonically-assisted de-alloying, M-ization treatment, and jet mill processing to produce nano-porous powders, including steps of preparing a precursor alloy, removing element A, performing M-ization reactions, and secondary crushing with a jet mill to achieve nano-porous T-M fine powders.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If conventional de-alloying method is used to prepare nano-porous materials, then bulk nano-porous metal materials can be obtained, but the method is limited to metal particles with particle size of 0.1 μm to 10 μm and cannot prepare brittle nano-porous oxide, nitride, or hydride particles
Solution Approach 1:
The invention changes the chemical composition parameters by introducing reactive elements (O, N, H) into the de-alloying process. By controlling the presence of these elements during ultrasonically-assisted de-alloying, the method can produce not only metallic nano-porous particles but also oxide, nitride, and hydride particles with the same nano-porous structure, thereby expanding material versatility while maintaining ease of manufacture through a single unified process
Solution Approach 2:
The invention creates composite nano-porous structures by combining metal particles with oxide, nitride, or hydride phases. The resulting particles have a composite composition (metal + compound) with controlled nano-porous morphology, enabling preparation of diverse material types including brittle oxides, nitrides, and hydrides that were previously inaccessible through conventional de-alloying methods
2Manufacturing precision
If jet mill is used for crushing nano-porous T-M coarse powder, then nano-porous T-M fine powder with micron or sub-micron size can be produced, but the process requires additional M-ization treatment step
Solution Approach 1:
The M-ization treatment is performed as a preliminary action before jet mill crushing. By introducing reactive elements (O, N, H) into the nano-porous structure beforehand, the material undergoes phase transformation that enhances its suitability for subsequent jet mill processing, enabling precise particle size control at micron or sub-micron levels while maintaining a systematic multi-step process
Solution Approach 2:
The process maintains continuity by seamlessly connecting the M-ization treatment with the jet mill crushing operation. The reactive element incorporation creates a transitional state in the material that bridges the chemical treatment phase and the mechanical粉碎 phase, ensuring continuous useful action throughout the manufacturing process without interruption or loss of nano-porous structure
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
The method enables low-cost mass production of nano-porous powders with micron or sub-micron sizes and high specific surface area, suitable for applications in catalysis, new energy, powder metallurgy, and ceramics.
Implementation Method 1
by using an ultrasonically-assisted de-alloying method, removing an element A in the alloy AxTy to obtain a primarily-ultrasonicated nano-porous T coarse powder
Implementation Method 2
by using an ultrasonically-assisted de-alloying method, removing an element A in the alloy AxTy
Implementation Method 3
the M-ization reaction includes but is not limited to at least one of oxidation reaction
Implementation Method 4
the M-ization reaction includes but is not limited to at least one of oxidation reaction, nitrogenation reaction
Implementation Method 5
the M-ization reaction includes but is not limited to at least one of oxidation reaction, nitrogenation reaction, and hydrogenation reaction
Implementation Method 6
passing the nano-porous T-M coarse powder through a jet mill to undergo secondary crushing
Data Source
AI summary
The present disclosure relates to a method of preparing a nano-porous powder material. The method includes: firstly removing A in the alloy AxTy by using an ultrasonically-assisted de-alloying method to prepare a nano-porous T coarse powder, and then, allowing the nano-porous T coarse powder to perform M-ization reaction with a gas reactant containing M to obtain a nano-porous T-M coarse powder, and finally, further crushing the nano-porous T-M coarse powder using a jet mill to obtain a nano-porous T-M fine powder. The method can achieve low-cost mass production of the nano-porous T-M fine powder, bringing broad application prospects.