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Effect of Sintering Temperature on Thermoelectric Properties of p‐Bi 2 Te 3 Alloys Produced by Gas Atomization
Author(s) -
Madavali Babu,
Kim HyoSeob,
Choi MinGyu,
Park GiChan,
Koo JarMyung,
Son HyeonTaek,
Hong SoonJik
Publication year - 2015
Publication title -
international journal of applied ceramic technology
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 0.4
H-Index - 57
eISSN - 1744-7402
pISSN - 1546-542X
DOI - 10.1111/ijac.12468
Subject(s) - materials science , sintering , seebeck coefficient , thermoelectric effect , hot pressing , alloy , metallurgy , grain size , electrical resistivity and conductivity , thermoelectric materials , relative density , thermal conductivity , analytical chemistry (journal) , composite material , thermodynamics , physics , electrical engineering , engineering , chemistry , chromatography
In this research, p‐type Bi 2 Te 3 –75% Sb 2 Te 3 thermoelectric alloy powders were produced by gas atomization and subsequently sintered by hot pressing at different temperatures. The grain growth of the hot‐pressed samples was observed with increasing sintering temperature from 380°C to 460°C. The compressive strength increased with increasing hot‐pressing temperature due to the high relative density of bulk samples obtained at high temperatures. The effect of sintering temperature on thermoelectric (TE) properties was studied. The maximum power factor 3.48 mW/mK 2 was obtained for the sample hot pressed at 420°C due to the resulting high electrical conductivity and enhanced Seebeck coefficient values.