Properties of thermoelectric Zn–Sb type material directly synthesized by spark plasma sintering
| Autor: | Marcin Lis, M. Staszewski, A. Wrona, J. Mazur, K. Bilewska |
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| Rok vydání: | 2014 |
| Předmět: |
Materials science
Mechanical Engineering Metallurgy Metals and Alloys Spark plasma sintering Sintering chemistry.chemical_element Zinc Thermoelectric materials chemistry Chemical engineering Mechanics of Materials Phase (matter) Powder metallurgy Thermoelectric effect Materials Chemistry Stoichiometry |
| Zdroj: | Journal of Alloys and Compounds. 616:350-355 |
| ISSN: | 0925-8388 |
| DOI: | 10.1016/j.jallcom.2014.07.120 |
| Popis: | The aim of the work was to investigate a possibility of a direct synthesis of Zn 4 Sb 3 compound by spark plasma sintering and evaluate the influence of the synthesis parameters on the materials properties. Materials with various initial compositions are sintered to multiphase samples composed of a Zn 4 Sb 3 matrix in which ZnSb, Zn and Sb inclusions are found. For each initial stoichiometry, the temperature and sintering duration are limited in a different manner by decomposition of desired β -Zn 4 Sb 3 phase. High concentration of inclusions is evidenced to degrade thermoelectric properties of Zn–Sb type materials. A high Power Factor of 1200 μW/(m K 2 ) was found in the material of stoichiometric starting composition at 580 K. An interesting correlation between improvement of thermoelectric properties and zinc depletion of the β -Zn 4 Sb 3 phase was discovered. |
| Databáze: | OpenAIRE |
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