Nanometer porous silver alloy material and preparation method thereof

A technology of nanoporous silver and alloy materials, applied in the field of nanoporous silver alloy materials and their preparation, to achieve the effect of uniform size distribution and uniform structure

Inactive Publication Date: 2015-06-03
BEIHANG UNIV
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  • Summary
  • Abstract
  • Description
  • Claims
  • Application Information

AI Technical Summary

Problems solved by technology

At present, the precursors of porous silver are mainly single-phase solid solution materials such as Ag-Al, Ag-Mg and Ag-Zn alloys. The dealloying process requires electrochemical methods to corrode for a long time (more than 1 hour). is the main factor limiting its application

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  • Nanometer porous silver alloy material and preparation method thereof
  • Nanometer porous silver alloy material and preparation method thereof
  • Nanometer porous silver alloy material and preparation method thereof

Examples

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Effect test

Embodiment 1

[0040] Embodiment 1: with Ag 38.75 Cu 38.75 Si22.5 Preparation of Nanoporous Silver Using Amorphous Alloy as Precursor

[0041] In this embodiment, the selected amorphous alloy precursor composition is Ag 38.75 Cu 38.75 Si 22.5 , the preparation method of nanoporous material is as follows:

[0042] Step 1: Weigh each element

[0043] Calculate the weight of each element related to it according to the number of atoms required, and weigh it according to the atomic amount of each element converted into mass during the actual preparation process;

[0044] Step 2: Refining master alloy

[0045] Put the required raw materials weighed in step 1 into the vacuum arc melting furnace and adjust the vacuum degree to 5×10 -3 Pa, filled with argon protective gas, the argon pressure is 0.05MPa; adjust the current to 50A, the melting temperature is 1000K; after repeated melting for 3-4 times, cool with the furnace, and take out the master alloy;

[0046] Step 3: Copper Wheel Swing Bel...

Embodiment 2

[0050] Embodiment 2: with (Ag 38.75 Cu 38.75 Si 22.5 ) 0.99 Pt 1 Preparation of Nanoporous Ag-Pt Alloys Using Bulk Amorphous Alloy as Precursor

[0051] In this embodiment, the selected amorphous alloy precursor composition is (Ag 38.75 Cu 38.75 Si 22.5 ) 0.99 Pt 1 , the preparation method of nanoporous material is as follows:

[0052] Step 1: Weigh each element

[0053] Calculate the weight of each element related to it according to the required number of atoms. In the actual preparation process, convert the atomic amount of each element into mass weighing, which is a common knowledge in the field;

[0054] Step 2: Refining master alloy

[0055] Put the required raw materials weighed in step 1 into the vacuum arc melting furnace and adjust the vacuum degree to 5×10 -3 Pa, filled with argon protective gas, the argon pressure is 0.05MPa; adjust the current to 150A, the melting temperature is 2000K; after repeated melting for 3-4 times, cool with the furnace, and tak...

Embodiment 3

[0061] With (Ag 50 Cu 30 Si 20 ) 0.99 PD 1 Preparation of Nanoporous Ag-Pt Alloys Using Bulk Amorphous Alloy as Precursor

[0062] In this embodiment, the selected amorphous alloy precursor composition is (Ag 50 Cu 30 Si 20 ) 0.99 PD 1 , the preparation method of nanoporous material is as follows:

[0063] Step 1: Weigh each element

[0064] Calculate the weight of each element related to it according to the required number of atoms. In the actual preparation process, convert the atomic amount of each element into mass weighing, which is a common knowledge in the field;

[0065] Step 2: Refining master alloy

[0066] Put the required raw materials weighed in step 1 into the vacuum arc melting furnace and adjust the vacuum degree to 5×10 -3 Pa, filled with argon protective gas, the argon pressure is 0.05MPa; adjust the current to 150A, the melting temperature is 2000K; after repeated melting for 3-4 times, cool with the furnace, and take out the master alloy;

[00...

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Abstract

The invention discloses a nanometer porous silver alloy material and a preparation method thereof. Specifically, amorphous alloy is taken as a precursor; elements, excluding noble metals such as Ag, Pt, Pd,Au, Ru, Rh, Os and Ir in the alloy, are corroded by a dealloying method to form a nanometer porous structure; a lace is elemental silver or silver alloy (a solid solution, the solute atom is noble metals such as Pt, Pd, Au, Ru, Rh, Os and Ir); the feature size of both the pores and the lace is smaller than 50 nanometers. The nanometer porous silver alloy material prepared by the method disclosed by the invention has self-sustaining property and structural controllability and can maintain the structural integrity and self-sustaining property after 70% of mass is lost. The preparation method and a detection method are simple; the obtained material can be widely applied to various catalytic reactions.

Description

technical field [0001] The invention relates to a nanoporous silver alloy material and a preparation method thereof. Background technique [0002] The preparation of nanoporous metals by dealloying method is to selectively remove one or more active components in the alloy by electrochemical methods by using the difference in chemical properties between different components in the alloy, and the remaining metal components form a three-dimensional porous structure. The dealloying method can obtain a three-dimensional network porous structure with a high specific surface area. The ligaments and pore channels are continuous with each other, and the porous structure can be dynamically adjusted. It has the advantages of simple operation, low cost and suitable for large-scale production. Dealloying is an effective method to obtain porous metal materials with nanometer-sized pores more conveniently and quickly, and has achieved a breakthrough in the pore size of porous metal materi...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C22C1/08C22C5/06
Inventor 张敏张涛逄淑杰李明仆
Owner BEIHANG UNIV
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