کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10624441 | 989594 | 2016 | 5 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhancement of thermoelectric performance of Sr0.7Ba0.3Nb2O6âδ ceramics by lanthanum doping
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Thermoelectric properties of La doped Sr0.7Ba0.3Nb2O6-δ ceramics were investigated in the temperature range from 323 K to 1073 K. The electrical resistivity decreases due to the subsitution of La for Sr, leading to the enhancement of thermoelectric power factor in the heavily doped sample Sr0.50La0.20Ba0.30Nb2O6âδ. Slight La-doping promotes the growth of Sr0.7Ba0.3Nb2O6âδ grains, but it will be impeded in the heavily La doped samples. Thus, La heavily doped sample Sr0.50La0.20Ba0.30Nb2O6âδ shows low thermal conductivity because of the phonon scattering caused by grain boundaries. The highest thermoelectric performance was observed in the sample Sr0.50La0.20Ba0.30Nb2O6âδ, and the thermoelectric figure of merit reaches the maximum value ~0.22 at 1073 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 42, Issue 1, Part B, January 2016, Pages 1128-1132
Journal: Ceramics International - Volume 42, Issue 1, Part B, January 2016, Pages 1128-1132
نویسندگان
Yi Li, Jian Liu, Yacui Zhang, Yucheng Zhou, Jichao Li, Wenbin Su, Jinze Zhai, Hongchao Wang, Chunlei Wang,