کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
1612231 | 1516305 | 2014 | 6 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced thermoelectric performance of highly dense and fine-grained (Sr1âxGdx)TiO3âδ ceramics synthesized by sol-gel process and spark plasma sintering
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
فلزات و آلیاژها
پیش نمایش صفحه اول مقاله
![عکس صفحه اول مقاله: Enhanced thermoelectric performance of highly dense and fine-grained (Sr1âxGdx)TiO3âδ ceramics synthesized by sol-gel process and spark plasma sintering Enhanced thermoelectric performance of highly dense and fine-grained (Sr1âxGdx)TiO3âδ ceramics synthesized by sol-gel process and spark plasma sintering](/preview/png/1612231.png)
چکیده انگلیسی
Highly dense and fine-grained (Sr1âxGdx)TiO3âδ ceramics (x = 0.05-0.12) were fabricated by a sol-gel process plus spark plasma sintering, and their thermoelectric properties were investigated from â¼300 K to 1100 K. The results show that the electrical resistivity of the (Sr1âxGdx)TiO3âδ ceramics decreases greatly while maintaining large absolute value of the Seebeck coefficient |S| upon Gd doping. As a result, a large power factor (PF) greater than 10 μW cmâ1 Kâ2 is obtained in (Sr0.9Gd0.1)TiO3âδ in the temperature range from 400 K to 1000 K, and peak PF reaches 16 μW cmâ1 Kâ2 at â¼570 K. Simultaneously, the lattice thermal conductivity κL reduces remarkably (e.g. κL decreases from 2.7 to 2.13 W mâ1 Kâ1 at â¼1000 K). Owing to the large PF and low κL, a record value of figure of merit ZT = 0.37 is achieved at 1006 K for (Sr0.9Gd0.1)TiO3âδ, indicating that appropriate combinations of fine-grained microstructure with both high densities and proper doping as well as oxygen deficiency are essential to the effective enhancement of thermoelectric performance of STO-based ceramics.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of Alloys and Compounds - Volume 588, 5 March 2014, Pages 562-567
Journal: Journal of Alloys and Compounds - Volume 588, 5 March 2014, Pages 562-567
نویسندگان
Liangliang Li, Yongfei Liu, Xiaoying Qin, Di Li, Jian Zhang, Chunjun Song, Ling Wang,