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http://dx.doi.org/10.3740/MRSK.2005.15.7.435

Low-Temperature Thermoelectric Properties of Zn4Sb3 Prepared by Hot Pressing  

Park Jong-Bum (Department of Materials Science and Engineering/ReSEM, Chungju National University)
Ur Soon-Chul (Department of Materials Science and Engineering/ReSEM, Chungju National University)
Kim Il-Ho (Department of Materials Science and Engineering/ReSEM, Chungju National University)
Publication Information
Korean Journal of Materials Research / v.15, no.7, 2005 , pp. 435-438 More about this Journal
Abstract
Single phase $Zn_4Sb_3$ with $98.5\%$ of theoretical density was successfully produced by direct hot pressing of elemental powders containing $1.2 at\%$ excess Zn for compensating the evaporation during the process. Temperature dependences of thermoelectric properties were investigated from 4 K to 300 K. Seebeck coefficient, electrical conductivity, thermal conductivity as well as thermoelectric figure of merit showed the discontinuity in variation at 242K, indicating the $\alpha-\beta$, phase transformation. Interestingly, it was found that lattice thermal conductivity by phonons is dominant in total thermal conductivity of $\alpha-\beta$. Therefore, it is expected that thermoelectric properties can be improved by reduction of lattice thermal conductivity inducing lattice scattering centers by doping and solid solution.
Keywords
thermoelectric; hot pressing.;
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