A method to effectively improve the thermoelectric performance of pbte based on ga element doping
A technology of thermoelectric performance and element doping, which is applied in the manufacture/processing of thermoelectric devices, materials for junction leads of thermoelectric devices, etc., can solve the problems of staying in basic research, low thermoelectric performance of PbTe matrix, and hindering commercial applications, etc. Achieve the effects of less impurities, high density and high crystallinity
Active Publication Date: 2019-08-02
SICHUAN UNIV
View PDF5 Cites 0 Cited by
- Summary
- Abstract
- Description
- Claims
- Application Information
AI Technical Summary
Problems solved by technology
However, the low thermoelectric performance of the PbTe matrix seriously hinders its commercial application, and the current domestic reports on such compounds are still in the basic research stage.
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 Construction
[0032] The specific implementation of the present invention will be described in conjunction with the examples.
[0033] (1) Weigh Pb powder, Te powder and Ga block according to the element ratio of 1:x:1-x, where the value of x is 0.01, 0.02, 0.03 respectively; then put Pb powder and Te powder in an agate mortar Mix and grind for 30 minutes to make the powder mix evenly;
[0034] (2) Transfer the ground powder into a steel mold with Φ=10mm, and use a pressure of 5MPa for 5min;
[0035] (3) Move the pressed sheet sample and Ga block into a cleaned Φ=20mm quartz tube; use a hydrogen-oxygen generator to seal the tube; first use a mechanical pump to pre-vacuum, and then use a molecular pump to evacuate to 1.5× 10 -3 Pa, sealed tube;
[0036] (4) Finally, the quartz tube with the sample is placed in a box furnace for sintering;
[0037] (5) The first sintering: After 420 minutes, the temperature was raised from room temperature to 750°C, and the temperature was kept for 720 mi...
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 |
|---|---|---|
| thermoelectric figure of merit | aaaaa | aaaaa |
Login to View More
Abstract
The invention belongs to the field of materials, and relates to a method for effectively improving the thermoelectric performance of PbTe based on Ga element doping. Pb powder, Te powder and Ga blocks are weighed respectively according to the element ratio of 1:x:1-x, wherein the value of x is respectively taken as 0.01 ~0.05, grind, mix and press into a sheet, put it into a quartz tube, vacuumize and seal the tube, sinter and discharge plasma sinter in sequence to obtain a Ga-doped PbTe compound thermoelectric material. The method for improving the thermoelectric figure of merit of PbTe by Ga element doping provided by the invention can be used for the preparation of PbTe doped samples and the improvement of performance, the process operation is simple, and the repeatability is high. The method controls the degree of phase formation, density, and microstructure of the PbTe compound by adjusting the process parameters such as heating and cooling rate, phase formation temperature, and holding time, and has strong controllability; the prepared PbTe Ga-doped compound has high crystallinity and less impurities , high density, low thermal conductivity and high thermoelectric properties.
Description
technical field [0001] The invention belongs to the field of thermoelectric materials, and relates to a method for effectively improving the thermoelectric performance of PbTe based on Ga element doping. Background technique [0002] Since the oil crisis, energy shortages have continuously caused various social and economic problems. People have gradually realized that relying solely on fossil fuels and oil resources is not enough to support the development of human society. In addition, the ecological crisis that has continued to erupt in recent years has exacerbated the concerns of people around the world about traditional fuels, forcing countries to continuously invest a large amount of capital to open up green, sustainable, and environmentally friendly energy sources. [0003] Thermoelectric materials can directly realize mutual conversion of heat energy and electric energy by using temperature difference. Their reliable performance, long service life, and environmental ...
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): H01L35/34H01L35/16H10N10/01H10N10/852
Inventor 昂然王正上陈志禹唐军
Owner SICHUAN UNIV