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Updated: Aug 7, 2025
Thermochemical Studies of NiII and ZnII Ternary Complexes Using Ion Mobility-Mass Spectrometry
Published on: June 8, 2022
High-ZT Due to the Influence of Copper in Ti(Ni1-Cu)Sn
Yatir Sadia1,2, Dan Lumbroso1, Yaniv Gelbstein1
1The Department of Materials Engineering, Ben-Gurion University of the Negev, Beer-Sheva 8400711, Israel.
Abstract:
Most high-performance thermoelectric materials require either expensive, rare, or toxic elements. By doping TiNiSn, a low-cost, abundant thermoelectric compound, with copper as an n-type donor, some optimization can be performed for such materials. Ti(Ni1-Cu)Sn was synthesized by arc melting followed by heat treatment and hot pressing. The resulting material was analyzed for its phases using XRD and SEM and its transport properties. Cu undoped and 0.05/0.1% doped samples showed no additional phases in addition to the matrix half-Heusler phase, while the 1% copper doping initiated some Ti6Sn5 and Ti5Sn3 precipitation. The transport properties showed that copper acts as an n-type donor while also lowing the lattice thermal conductivity of the materials. the sample containing 0.1% copper showed the best figure of merit, ZT, with a maximal value of 0.75 and an average value of 0.5 through 325-750 K showing a 125% improvement over the undoped sample of TiNiSn.
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