naa a22 4500 510803040 CHVBK 20180411083404.0 cr unu---uuuuu 180411e20130701xx s 000 0 eng 10.1007/s11664-012-2316-y doi (NATIONALLICENCE)springer-10.1007/s11664-012-2316-y A Comparison Between the Mechanical and Thermoelectric Properties of Three Highly Efficient p -Type GeTe-Rich Compositions: TAGS-80, TAGS-85, and 3% Bi2Te3-Doped Ge0.87Pb0.13Te [Elektronische Daten] [Joseph Davidow, Yaniv Gelbstein] Since the 1960s, the TAGS system, namely (GeTe) x (AgSbTe2)1−x , with two specific compositions x=0.8 and 0.85, known as TAGS-80 and TAGS-85, respectively, was identified as containing highly efficient p-type thermoelectric materials. Recently, another highly efficient p-type GeTe-rich composition, namely 3% Bi2Te3-doped Ge0.87Pb0.13Te, achieving thermoelectric properties comparable to TAGS-based solid solutions, was also reported. Since all of these compositions were obtained by different manufacturing approaches, a comparison between the transport and mechanical properties of these alloys, prepared by the same manufacturing techniques, is required to identify the advantages and disadvantages of these compositions for practical thermoelectric applications. In the current research, the thermoelectric and mechanical properties of three highly efficient GeTe-rich alloys, TAGS-80, TAGS-85, and 3% Bi2Te3-doped Ge0.87Pb0.13Te, following hot pressing, were investigated and compared. Maximal ZT values of ∼1.75, ∼1.4, and ∼1.6 at 500°C were found for these compositions, respectively. Improvement of the mechanical properties was observed by increasing the GeTe content. The influence of the GeTe relative amount on the transport and mechanical properties was interpreted by means of the phase-transition temperatures from the low-temperature rhombohedral to the high-temperature cubic phases. TMS, 2012 TAGS nationallicence thermoelectrics nationallicence phase transition nationallicence lead germanium telluride nationallicence efficiency nationallicence figure of merit nationallicence Davidow Joseph The Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut Gelbstein Yaniv The Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/7(2013-07-01), 1542-1549 0361-5235 42:7<1542 2013 42 11664 https://doi.org/10.1007/s11664-012-2316-y text/html Onlinezugriff via DOI 1 research-article jats NATIONALLICENCE 856 40 https://doi.org/10.1007/s11664-012-2316-y text/html Onlinezugriff via DOI NATIONALLICENCE 700 1- Davidow Joseph The Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut NATIONALLICENCE 700 1- Gelbstein Yaniv The Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva, Israel aut NATIONALLICENCE 773 0- Journal of Electronic Materials Springer US; http://www.springer-ny.com 42/7(2013-07-01), 1542-1549 0361-5235 42:7<1542 2013 42 11664 Metadata rights reserved Springer special CC-BY-NC licence nationallicence BK010053 XK010053 XK010000 NATIONALLICENCE NATIONALLICENCE NL-springer