Preparation method of Cu1.8+xS binary thermoelectric material
A thermoelectric material, cu1.8 technology, applied in copper sulfide, nanotechnology and other directions, can solve problems such as unreported thermoelectric performance, and achieve the effects of less time-consuming, energy saving, and short preparation process
Inactive Publication Date: 2012-02-29
UNIV OF SCI & TECH BEIJING
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But about Cu 1.8 The thermoelectric performance of the S material system has not been reported so far
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[0008] Cu was first prepared by mechanical alloying method 1.8+x S (-0.1≤x≤0.1) binary nano-powder, the method is that Cu powder (mass percentage is greater than 99.9%) and S powder (mass percentage is greater than 99.5%) according to the general chemical formula Cu 1.8+x After S (-0.1≤x≤0.1) is proportioned, it is mixed and placed in a planetary ball mill, and mechanically alloyed under the protection of inert gas argon to obtain Cu 1.8+x S alloy powder. The powder is subjected to spark plasma sintering to obtain a bulk thermoelectric material.
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A preparation method of a Cu1.8+xS binary thermoelectric material belongs to the technical field of energy materials, and is characterized by comprising the following steps of: using an elemental copper powder (its mass fraction is greater than 99.9%) and an elemental sulfur powder (its mass fraction is greater than 99.8%) as raw materials, preparing a compound powder by a mechanical alloying method according to the ratio of Cu1.8+xS (x is less than or equal to 0.1 and greater than or equal to minus 0.1), and preparing the Cu1.8+xS bulk thermoelectric material which has a rhombohedral structure at room temperature by the adoption of a spark plasma sintering technology. The thermoelectric material has high conductivity and good mechanical properties. The raw materials required by the preparation method are cheap and easily available. The preparation method has advantages of no pollution and short technological process, and is convenient and fast.
Description
technical field [0001] The invention belongs to the technical field of energy materials, in particular to a Cu 1.8+x The preparation method of S binary thermoelectric material involves mechanical alloying and discharge plasma sintering technology. Background technique [0002] Thermoelectric materials are energy materials that can directly realize the mutual conversion of heat energy and electric energy, and have broad application prospects in improving the comprehensive utilization of energy. At present, high-performance thermoelectric materials mainly include Bi 2 Te 3 base, PbTe base and CoSb 3 These materials have high thermoelectric performance but involve expensive, toxic or environmentally polluting elements or materials. Cu 1.8 The S compound has a rhombohedral structure, in which the S atoms in the face-centered cubic sublattice occupy the face-centered positions, and the Cu atoms occupy the lattice apex positions, and the S atoms in the face-centered cubic sub...
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Inventor 张波萍葛振华于昭新刘勇
Owner UNIV OF SCI & TECH BEIJING
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