期刊
JOURNAL OF ELECTRONIC MATERIALS
卷 40, 期 5, 页码 1095-1099出版社
SPRINGER
DOI: 10.1007/s11664-011-1549-5
关键词
Bismuth antimony telluride; thermoelectric performance; hot forging
资金
- Natural Science Foundation of China [50731006]
- National 973'' Program of China [2007CB607502]
- National 863'' Hi- tech Program of China [2007 AA03Z234]
- Zhejiang Provincial Natural Science Foundation of China [Z4090204]
The thermoelectric (TE) performance of Bi0.5Sb1.5Te3 polycrystalline alloys has been improved by a simple hot-forging process. No obvious texture was observed in the x-ray diffraction (XRD) patterns of the hot-forged samples. Transport property measurements indicated that the hot-forged samples possessed extremely low thermal conductivities. A maximum ZT value of similar to 1.1 at room temperature was obtained for the sample forged under 30 MPa pressure, being almost 50% more than that of the initial unforged alloy. High-resolution transmission electron microscopy (HRTEM) observations suggested that the high density of lattice defects of the hot-forged samples could be responsible for the extremely low thermal conductivities.
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