کد مقاله کد نشریه سال انتشار مقاله انگلیسی نسخه تمام متن
10640124 995872 2005 5 صفحه PDF دانلود رایگان
عنوان انگلیسی مقاله ISI
Fabrication and thermoelectric performance of textured n-type Bi2(Te,Se)3 by spark plasma sintering
موضوعات مرتبط
مهندسی و علوم پایه مهندسی مواد مواد الکترونیکی، نوری و مغناطیسی
پیش نمایش صفحه اول مقاله
Fabrication and thermoelectric performance of textured n-type Bi2(Te,Se)3 by spark plasma sintering
چکیده انگلیسی
The n-type Bi2(Te,Se)3 thermoelectric materials with preferred grain orientation have been fabricated through the spark plasma sintering (SPS) technique. The c-axis of the grains in the sintered samples were preferentially oriented parallel to the pressing direction, the orientation factor of the (0 0 l) planes changed from 0.4 to 0.85 with the sintering conditions. The anisotropy was investigated by measuring the electrical conductivities in the two directions perpendicular and parallel to the pressing direction. The optimal figure of merit ZT (ZT = α2σT/κ) of the sintered materials in the direction perpendicular to the pressing direction was comparative to that of the zone-melted materials in the same crystallographic direction, while the bending strength reached about 80 MPa, which is 7-8 times of that of the zone-melted materials.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Materials Science and Engineering: B - Volume 117, Issue 3, 25 March 2005, Pages 334-338
نویسندگان
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