Herein, we reported a synthesis technique based on the up-scaled solid state reaction for Al and Bi co-doped Mg2Si polycrystalline bulks and investigated their thermoelectric transport properties. The powders (~ 1 kg/batch) were synthesized for mass production by using the solid state reaction, and the polycrystalline bulks were consolidated with a diameter of 25 mm and thickness of 3 mm using hot pressing and spark plasma sintering techniques. Both the hot pressed and the spark plasma sintered bulks showed good reproducibility and positional uniformity of the thermoelectric properties and the highest ZT value of 0.98 was obtained at 873 K.
Bibliographical noteFunding Information:
This work was supported by Hyundai Motor Company ( 2015-11-0146 ), the National Research Foundation of Korea (NRF) Grant funded by the Korea government (MSIP) ( 2014R1A2A1A10053869 ), the Priority Research Centers Program ( 2009-0093823 ), and the Industrial Fundamental Technology Development Program ( 10052977 ) funded by the Ministry of Trade, Industry and Energy (MOTIE) of Korea.
All Science Journal Classification (ASJC) codes
- Materials Science(all)
- Condensed Matter Physics
- Mechanics of Materials
- Mechanical Engineering
- Metals and Alloys