A kind of synthesis method of bicuseo thermoelectric material
A synthesis method and technology of thermoelectric materials, applied in chemical instruments and methods, selenium/tellurium compounds, inorganic chemistry, etc., can solve the problems of not getting the target product, incomplete reaction, and extinguishing halfway, so as to reduce the risk of incomplete reaction The effect of risk, low raw material cost and low equipment requirement
Active Publication Date: 2019-01-11
WUHAN UNIV OF TECH
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
In large-scale production, once the ignition conditions are not properly controlled, it is easy to cause an accident of extinguishing midway, making the reaction incomplete and unable to obtain a pure target product.
Method used
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
View moreImage
Smart Image Click on the blue labels to locate them in the text.
Smart ImageViewing Examples
Examples
Experimental program
Comparison scheme
Effect test
Embodiment 1
[0045] A kind of synthetic method of BiCuSeO thermoelectric material, it comprises the following steps:
[0046] 1) Weigh CuO, Bi, Se powder as raw material according to the stoichiometric ratio of 1:1:1, the total amount is 10g, mix them evenly in an agate mortar, and use the obtained mixed powder as a reactant, put the reactant into steel In grinding tool making, adopt the pressure of 6MPa on the tablet press and hold pressure 5min to make diameter be the 10mm ingot body (reactant);
[0047] 2) Vacuum-seal the ingot obtained in step 1) in a quartz glass tube, then move the bottom end of the glass tube to a gas flame to ignite, trigger a self-propagating combustion reaction, and cool or quench after the reaction is completed to obtain a BiCuSeO compound;
[0048] 3) Grind the BiCuSeO compound obtained in step 2) into powder, weigh 4.6g of the powder and put it into a Φ15mm graphite mold for compaction, and then place the graphite mold in a spark plasma sintering (SPS) equipme...
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More PUM
| Property | Measurement | Unit |
|---|---|---|
| diameter | aaaaa | aaaaa |
| diameter | aaaaa | aaaaa |
| thermoelectric figure of merit | aaaaa | aaaaa |
Login to View More
Abstract
The invention provides a synthetic method of a BiCuSeO thermoelectric material. The method concretely comprises the following steps: 1, weighing CuO, Bi and Se powder adopted as raw materials according to a stoichiometric ratio of 1:1:1, and uniformly mixing the raw materials to obtain a reactant; 2, initiating a self-propagating combustion reaction of the reactant, and cooling or quenching the above obtained reaction product to obtain a BiCuSeO compound; and 3, grinding the BiCuSeO compound to form powder, and carrying out discharge plasma sintering to obtain the block compact BiCuSeO thermoelectric material. CuO / Bi / Se are adopted as the raw materials to effectively avoid the process of an O atom occupying the 6c site of the Se atom in BiCuSeO in the SHS reaction of Bi2O3 / Bi / Se / Cu adopted as the raw materials, so the combustion wave propagating speed is improved by about 36%; and the optimal thermoelectric performance value ZT of the prepared thermoelectric material at 873 K reaches 0.66, and the cost of the raw materials is low, so great foundation is laid for large-scale commercial application of the thermoelectric material.
Description
technical field [0001] The invention belongs to the technical field of new energy material preparation-combustion synthesis, and specifically relates to a synthesis method of a BiCuSeO thermoelectric material. Background technique [0002] In the past ten years, with the rapid population expansion and rapid industrial development, energy and environmental issues have gradually become prominent, and the energy crisis and environmental crisis have attracted increasing attention. At present, about 70% of the energy consumed in the world every year is wasted in the form of waste heat. If the waste heat can be effectively recycled, the problem of energy shortage will be greatly alleviated. Thermoelectric materials can directly convert thermal energy into electrical energy. They have the advantages of no transmission parts, small size, no noise, no pollution, and good reliability. They have great application prospects in the recycling of automobile waste heat and industrial waste ...
Claims
the structure of the environmentally friendly knitted fabric provided by the present invention; figure 2 Flow chart of the yarn wrapping machine for environmentally friendly knitted fabrics and storage devices; image 3 Is the parameter map of the yarn covering machine
Login to View More Application Information
Patent Timeline
Login to View More Patent Type & Authority Patents(China)
IPC IPC(8): C01B19/00
Inventor 唐新峰杨东旺杜慧真苏贤礼鄢永高
Owner WUHAN UNIV OF TECH