| dc.description.abstract | Due to the increase in greenhouse gases in recent years, the problem of global warming has become increasingly serious, and experts from all over the world are actively searching for alternative new energy sources and expanding research on energy recycling and reuse. One of the most popular research areas is thermoelectric power generation. Thermoelectric power generation is the use of temperature difference to generate electricity, according to the Seebeck effect, when there is a temperature difference between the two sides, that is, the potential difference, which generates electric current, realizing the result of the conversion of thermal energy into electrical energy.
Currently, the conversion efficiency of thermoelectric materials is still facing challenges, but the use of recycled waste heat and the generation of temperature difference in power generation still has considerable potential for development. Scientists are constantly striving to develop new thermoelectric materials by synthesizing and designing different structures to improve their energy conversion efficiency. In this paper, we focus on P-type Mg2SnAg0.02+25 at% Mg+4% Mg2Si thermoelectric material and try to form a thermoelectric element with N-type Mg2 (SiSn) by metal diffusion bonding, conductive Ag paste bonding, and soldering test, and then we measure and analyze the bonding strength and output characteristics of the element.
In the test results, we compared the best way to connect the thermoelectric elements, the selected bridge metal is 100um Ni sheet, and use the cold-pressing method to stack the contact metal 30um Al /30um Ag /20um Sn foil on the surface of P, N specimen respectively, and sintering for 1 hour to make the metal diffusion bonded to the PNPN module. Finally, the conductive Ag paste is coated on the surface of the specimen at the front and back of the PNPN module, and soldered with WU-4 solder to form a large-scale thermoelectric module. The PNPN module with optimal parameters is subsequently measured and analyzed for bond strength and output characteristics. | en_US |