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Method for preparing CuCrS2 nano powder

A nano-powder and ball-milling tank technology, applied in the field of nano-materials, can solve problems such as high temperature and atmosphere protection, harsh reaction conditions, and long preparation cycle, and achieve the effects of easy operation, simple preparation process, and short cycle

Inactive Publication Date: 2010-06-02
UNIV OF SCI & TECH BEIJING
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Problems solved by technology

[0004] The object of the present invention is to provide a kind of CuCrS 2 The preparation method of nano-powder overcomes the original solid-phase reaction method to prepare single-phase CuCrS 2 Powder needs high temperature and atmosphere protection, harsh reaction conditions, long preparation cycle, large energy consumption and other defects

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  • Method for preparing CuCrS2 nano powder
  • Method for preparing CuCrS2 nano powder
  • Method for preparing CuCrS2 nano powder

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Embodiment Construction

[0016] Preparation of CuCrS by Mechanical Alloying 2 Nano powder, the method is to Cu powder (mass percentage ≥ 99.9%), Cr powder (mass percentage ≥ 99.9%) and S powder (mass percentage ≥ 99.5%) according to the chemical formula CuCrS 2 Proportioning, mixing and putting into planetary ball mill, mechanical alloying under the protection of inert gas, dry grinding to synthesize compound, then wet grinding, and drying to obtain CuCrS 2 Nano powder. Table 1 has provided the present invention (CuCrS 2 ) of several preferred embodiments:

[0017]

[0018] In summary, the present invention synthesizes CuCrS by mechanical alloying 2 Nano-powder, the particle size of the powder can be controlled by adjusting the ball milling time and rotating speed, which is suitable for large-scale production.

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Abstract

The invention discloses a method for preparing CuCrS2 nano powder and belongs to the technical field of nano materials. In the method, Cu powder (more than or equal to 99.9 mass percent), Cr(more than or equal to 99.9 mass percent) and S powder (more than or equal to 99.9 mass percent), serving as raw materials, are mixed according to a stoichiometric molar ratio of Cu to Cr to S of 1:1:2 of the final product and then put in a planetary ball mill to be milled at a certain rotation speed to form compound powder, then a certain amount of absolute ethanol is added into the compound powder for wet milling, and drying a resulting product to obtain the CuCrS2 nano powder which has a uniform particle size of 5 to 990 nano meters. The preparation method has the advantages that: the raw materials are cheap and readily available; the preparation process is simple, quick and easy in operation; and the requirements on equipment and preparation environment are low; and the particle size of the powder is uniform and controllable.

Description

technical field [0001] The invention belongs to the technical field of nanomaterials, in particular to a CuCrS 2 The preparation method of the nanopowder involves a mechanical alloying (Mechanical Alloying, MA) process. Background technique [0002] CuCrS 2 It is a layered structure semiconductor material belonging to the transition metal sulfide YCrX of chromium 2 (Y=Ag, Cu, K, Na, X=S, Se), this material system has the characteristics of mixed conductance and unique magnetic properties. Le Negrad et al [Le Nagard N., Collin G., Materials Research Bulletin, 14(1979) 1411.] first studied CuCrS 2 electrical properties, the experimental results show that CuCrS 2 It is a typical semiconductor material with an intrinsic activation energy of 4meV between 60K and 300K. Abramova et al [AbramovaG.M., Vorotynov A.M., Physics of the Solid State, 46(2004) 2245.] found that CuCrS 2 At the same time, it has both ionic conductivity and electronic conductivity, that is, it has the ch...

Claims

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Application Information

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Patent Type & Authority Applications(China)
IPC IPC(8): C01G37/00B82B3/00
Inventor 张波萍陈跃星葛振华尚鹏鹏于一强陈晨
Owner UNIV OF SCI & TECH BEIJING
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