Push type dynamic continuous preparation method of copper tellurium intermetallic compound powder

Abstract

The invention discloses a push type dynamic continuous preparation method of copper tellurium intermetallic compound powder, and the process steps are as follows: (1) Cu powder and Te powder are used as raw materials, and the mass percentage of each raw material is calculated for proportioning in accordance with the chemical formula of a copper tellurium intermetallic compound; (2) the raw materials are mixed and dried; (3) a push type dynamic continuous sintering device is used for solid state reaction synthesis, a mixed powder material obtained by the step (2) is filled into a plurality of reaction boats, a cooling chamber, a reaction chamber and a preheating chamber are filled with an inert gas by a gas inlet of the cooling chamber in the gas flow rate of 0.1-3L / min, the temperature of the preheating chamber is heated to preheating temperature, the temperature of the reaction chamber is heated to reaction temperature 300 to 700 DEG C, the cooling chamber is in a working condition, and the reaction boats loaded with the mixed powder material are successively put into a feeding chamber in certain time intervals. The method can realize continuous batch preparation of stoichiometric compounds and non stoichiometric compounds.

Description

technical field [0001] The invention belongs to the field of preparation of transition group metal tellurides, in particular to a dynamic continuous batch preparation method of copper-tellurium intermetallic compound powder. Background technique [0002] Waste heat energy is a clean and green secondary energy source with a wide range of sources, no fossil fuels, almost zero cost. A large amount of heat is generated all over the world every day and is directly discharged into the atmosphere in the form of waste heat without utilization. According to relevant data from the U.S. Department of Energy, as much as 50% of the fuel in the United States is discharged into the atmosphere in the form of waste heat after burning without utilization. electricity and reduce greenhouse gas emissions by 20%. However, such a huge amount of waste heat cannot be directly used for traditional thermal power generation due to its relatively low temperature (tens to hundreds of degrees Celsius),...

AI Technical Summary

Problems solved by technology

The high energy ball milling method has a long production cycle, high energy consumption, and the grinding balls need to be replaced periodically during the production process due to wear, all of which increase the production cost of the high energy ball milling method

And in the long-term ball milling process, it is easy to generate a small amount of impurities that deviate from the stoichiometric ratio of the prepared product, and even impurities from the grinding balls are mixed into the product, so it is difficult to achieve the controllable preparation of stoichiometric compounds

Chemical methods can basically achieve the controllable preparation of stoichiometric compounds, but the chemicals used in the preparation process (such as alkaline solution, liquid ammonia, hydrazine hydrate, ethylenediamine, acetone, cetyltrimethylammonium bromide, etc. ), the large reactors required in the industrial production process, the reaction waste liquid discharge pool, the sewage treatment system, etc. make the production cost higher and the environment is not friendly

Therefore, none of the existing preparation methods of Cu-Te series compounds can achieve low-cost, easy-to-operate and controllable preparation and industrial production of a series of Cu-Te compounds including stoichiometric compounds and non-stoichiometric compounds.

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