Experimental investigation of phase relations in Bi-Te-RE (Yb,La, Ce) ternary systems |
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| Affiliation: | 1. Baku State University, General and Inorganic Chemistry Department, Baku, Azerbaijan;2. Institute of Radiation Problems, Azerbaijan National Academy of Science, Baku, Azerbaijan;3. Institute of Catalysis and Inorganic Chemistry, Azerbaijan National Academy of Science, Baku, Azerbaijan;4. Institute of Physics, Azerbaijan National Academy of Science, Baku, Azerbaijan;5. Ganja State University, Chemistry Department, Ganja, Azerbaijan;1. School of Materials Science and Engineering, University of Science and Technology Beijing, Beijing 100083, China;2. State Key Laboratory for Advanced Metals and Materials, University of Science and Technology Beijing, Beijing 100083, China;3. Shenzhen Key Laboratory of Special Functional Materials, Shenzhen University, Shenzhen 518060, China;1. Équipe Verres et Céramiques (V&C), ISCR CNRS UMR 6226, Université de Rennes 1, Rennes, 35042, France;2. School of Engineering and Materials Science, Queen Mary University of London, London, E1 4NS, United Kingdom;3. Institut de Physique de Rennes, CNRS UMR 6251, Université de Rennes 1, Rennes, 35042, France;1. State Key Laboratory of Powder Metallurgy, Central South University, Changsha, Hunan, 410083, China;2. School of Materials Science and Engineering, Anhui University of Science and Technology, Huainan, Anhui, 232001, China;3. School of Materials Science and Engineering, Central South University, Changsha, Hunan, 410083, China;4. SINTEF Materials and Chemistry, Trondheim, Norway;1. School of Science, Shenyang University of Technology, Shenyang, 110870, China;2. School of Materials Science and Engineering, Shenyang University of Technology, Shenyang, 110870, China |
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| Abstract: | Rare earth (RE) elements especially Yb, La and Ce have been frequently doped to Bi-Te alloys to improve thermoelectric performance. Three isothermal sections: Bi-Te-Yb at 573 K, Bi-Te-La and Bi-Te-Ce at 673 K were partly established by means of electron probe micro-analysis (EPMA) and powder X-ray diffractometry (XRD). The determined maximum solubilities of RE elements in Bi-Te alloys are very small and that of Yb reached the maximum about 0.3 at% at 573 K. Both LaTe2 and CeTe2 can dissolve a large amount of Bi, about 10 and 13 at% at 673 K, respectively. No ternary compound has been confirmed. |
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| Keywords: | Phase diagram Bi-Te-RE Thermoelectric |
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