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Effects of Bi 2 Se 3 Amount in Thermoelectric Performance of Bi 2 (TeSe) 3 Materials Fabricated by High‐Energy Ball Milling
Author(s) -
Rimal Pradip,
Han Seung Tek,
Hong SoonJik,
Kim HyoSeob,
Cho Kuk Young,
Lee Ilsueuk
Publication year - 2016
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.12534
Subject(s) - materials science , spark plasma sintering , thermoelectric effect , ball mill , thermoelectric materials , fabrication , sintering , metallurgy , figure of merit , composite material , optoelectronics , thermal conductivity , thermodynamics , medicine , physics , alternative medicine , pathology
Amount of Bi 2 Se 3 has significant role in controlling thermoelectric properties of n‐type Bi 2 (TeSe) 3 material. In this study, effects of Se alloying amount in Bi 2 (TeSe) 3 thermoelectric materials fabricated by high‐energy ball milling and spark plasma sintering were studied and compared with other fabrication methods. Amount of Bi 2 Se 3 (5%, 10%, 15%, and 20%) did not have any significant effect over fabricated powder size, grains of consolidated bulks, and mechanical properties; however, electrical properties and thermoelectric efficiency were noticeably influenced. Both carrier concentration and carrier mobility decreased with increase in Se amount. In total, 20% Se alloying was effective in improving thermoelectric figure of merit ZT value by almost 40% compared with only 5% Se alloying.