کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
10623984 | 989582 | 2016 | 8 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Microstructure and electrical transport properties of Ca3Co4âxMnxO9+δ ceramics fabricated under two-step external magnetic field
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
A series of Ca3Co4âxMnxO9+δ (x=0, 0.25 and 0.5) samples were prepared under two-step external magnetic field during both processes of sol-gel and pre-pressing. The effects of Mn doping and external magnetic field on the microstructure and electrical transport properties of the samples have been studied systematically. The investigated results show that Mn-doping can improve the electrical transport properties slightly. After using external magnetic field, the textured structures of all the samples are enhanced dramatically, which results in the obvious decrease of the electrical resistivity and increase of Seebeck coefficient. The difference of Ï between the x=0.5 samples without and with external magnetic field is about 24.73 mΩ cm at room temperature. All the samples with magnetic field show higher power factors (PF), for example, the PF at x=0.5 with magnetic field can reach the maximum value of 0.29 mW/m K2 at 1073 K.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 42, Issue 5, April 2016, Pages 6107-6114
Journal: Ceramics International - Volume 42, Issue 5, April 2016, Pages 6107-6114
نویسندگان
Yanyan Xu, Xiurong Qu, Shuchen Lü, Yu Qian, Jianmin Hu, Qingyu Meng,