Journal
JOURNAL OF ELECTRONIC MATERIALS
Volume 43, Issue 6, Pages 1726-1732Publisher
SPRINGER
DOI: 10.1007/s11664-013-2851-1
Keywords
Mechanical deformation; annealing effect; (Bi,Sb)(2)Te-3; thermoelectric properties
Categories
Funding
- Converging Research Center Program through the Ministry of Education, Science, and Technology [2013K000168]
- National Research Foundation of Korea [2010-50172] Funding Source: Korea Institute of Science & Technology Information (KISTI), National Science & Technology Information Service (NTIS)
Ask authors/readers for more resources
The effects of mechanical deformation and subsequent annealing on the thermoelectric properties and microstructure have been investigated for p-type (Bi0.25Sb0.75)(2)Te-3 alloys prepared by melting followed by quenching. The mechanically deformed pellets were prepared by repetition of cold-pressing of quenched samples at room temperature. Cold-pressed pellets were then annealed at 300A degrees C in vacuum, and the thermoelectric properties and microstructure were traced through the course of the heat treatment. For the heavily deformed samples, the Seebeck coefficient rapidly increased at the very early stage of annealing and did not change as the annealing time increased, due to recrystallization of a new delta-phase which equilibrated at the annealing temperature of 300A degrees C (delta(300)-phase). At the initial stage of annealing (recovery stage), the electrical resistivity sharply increased, probably due to the interaction of antistructural defects with vacancies produced during the cold-pressing treatment. However, for the lightly deformed samples, recrystallization occurred only at some portion of the grain boundaries, and the newly generated delta(300)-phase slowly replaced the original, as-solidified delta(ingot)-phase.
Authors
I am an author on this paper
Click your name to claim this paper and add it to your profile.
Reviews
Recommended
No Data Available