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Method for rapidly constructing multi-scale nano composite modified material
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A technology of nanocomposite and modified materials, applied in the fields of nanotechnology, nanotechnology, nanotechnology for materials and surface science, etc., can solve the problems of far-flung material systems, incomplete chemical reactions, etc.
Active Publication Date: 2020-12-11
WUHAN UNIV OF TECH
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[0005] In the process of in situ synthesis of composite materials, because the reaction starting material is blocked by other non-participating reaction materials, the combination reaction is often incomplete, resulting in the actual composite material is far from the original design material system
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Embodiment 1
[0030] A method for rapid construction of multiscale nanocomposite modified materials, with Bi 2 SeO 2 Cu 2 The Se matrix material is compounded and modified, and the specific steps are as follows:
[0031] 1) With Cu powder, Se powder and Bi 2 SeO 2 Flour is used as raw material, weighed according to the molar ratio of 2:1:0.01x (x=0,0.05,0.15,0.25,0.5), there are 5 groups in total, each group is 5g, numbered as a, b, c, d , e;
[0032] 2) Place each group of raw materials weighed in an agate mortar and grind for 20 minutes to obtain a uniform mixed powder (mixed raw materials a, b, c, d, e);
[0033] 3) Put the obtained mixed powders (a, b, c, d, e) into Φ16mm graphite molds for compaction, and then put the graphite molds into plasma activated sintering (PAS) equipment for activation for 30s (plasma In the activation stage, the pulse current is 60A, the pulse voltage is 2V, the ON / OFF pulse time is 30ms, the axial pressure is 50MPa, and the vacuum condition) to prepare...
Embodiment 2
[0038] A method for rapid construction of multiscale nanocomposite modified materials, using Ag 2 S is the addition of raw materials to CoSb 3 The matrix material is compounded and modified, and the specific steps are as follows:
[0039] 1) Co powder, Sb powder and Ag 2 S powder is used as raw material, weighed according to the molar ratio of 1:3:0.01x (x=0.5, 1.0, 2.5) respectively, a total of 3 groups, 5g in each group, numbered a, b, c respectively;
[0040] 2) Place each group of raw materials weighed in an agate mortar and grind for 20 minutes to obtain a uniform mixed powder (mixed raw material), then put the mixed powder into a steel mold, and use a 6MPa Press and hold for 5 minutes to make a Φ12mm ingot;
[0041] 3) Vacuum-seal the obtained ingots in quartz glass tubes respectively, then move the bottom end of the glass tubes to the gas flame for ignition, remove the flame immediately after the ignition reaction, the self-propagating combustion process (SHS) is com...
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Abstract
The invention provides a method for rapidly constructing a multi-scale nano composite modified material for the first time. The method is characterized in that a raw material for synthesizing a main phase material is mixed with an externally doped raw material, and then a chemical synthesis reaction of the main phase material and a decomposition reaction of the externally doped raw material are synchronously initiated under specific excitation conditions to achieve in-situ compounding of a composite phase obtained by decomposition of the externally-doped raw material in the main phase material. The related material design and preparation technology is simple, controllable and practical, and a brand-new thought can be provided for preparation and functional improvement of the nano compositematerial.
Description
technical field [0001] The invention belongs to the technical field of preparation of functional materials, and in particular relates to a method for quickly constructing multi-scale nanocomposite modified materials. Background technique [0002] Functional materials are a large class of new materials with special electrical, magnetic, optical, acoustic, thermal, mechanical, chemical and biological functions. They are important basic materials for high-tech fields such as information technology, biotechnology, energy technology and national defense construction. There are various types of functional materials and a wide range of uses, and a large-scale high-tech industrial group is being formed, which has very broad market prospects and extremely important strategic significance. Functional materials can be divided into microelectronic materials, optoelectronic materials, sensor materials, information materials, biomedical materials, ecological environment materials, energy ...
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