کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
7887166 | 1509787 | 2018 | 17 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Enhanced thermoelectric properties in Ge-doped and single-filled skutterudites prepared by unique melt-spinning method
ترجمه فارسی عنوان
خواص ترموالکتریک پیشرفته در اسپیتراتیت های تک و تک ژل تهیه شده با روش منحنی ذوب
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
چکیده انگلیسی
In this paper, we determined an effective substitution of Ge at Sb sites in Nd-filled p-type skutterudites, a series of Nd.9Fe2Co2Sb12-xGex compounds with compositions of xâ¯=â¯0, 0.1, 0.2, 0.3 and 0.4 were synthesized by home-made induction melting, assembled inside the glove box and followed by spark plasma sintering process (SPS). The thermoelectric properties are investigated as a function of Ge doping content with fixed Nd-filler at 0.9 and the formation of skutterudite phase is characterized by X-ray diffraction. All samples possess positive Seebeck coefficients, representing effective p-type doping. It is observed that the electrical conductivity decreases with decreasing Ge doping concentrations while increased with temperature due to bipolar effect. The lightly doped samples (xâ¯=â¯0.1 and 0.2) have lower lattice thermal conductivity over the entire temperature range, in which xâ¯=â¯0.2 sample shows the highest ZT value of 0.82 at 700â¯K, which is 30% higher than that of the Ge-free sample. The improvement in ZT can be attributed to the optimized carrier concentration and reduced thermal conductivity. The enhancement of ZT through Ge doping, coupled with drastically reduced processing time, shows that these compounds may have great potential in application as p-type segments of the thermoelectric devices.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 11, 1 August 2018, Pages 12610-12614
Journal: Ceramics International - Volume 44, Issue 11, 1 August 2018, Pages 12610-12614
نویسندگان
Nusrat Shaheen, Muhammad Sufyan Javed, Hidayat Ullah Shah, Shahid Hussain, Muhammad Ashfaq Ahmad, Rizwan Raza, Muhammad Saleem, Xiaoyuan Zhou,