کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8948550 | 1645669 | 2018 | 19 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Thermal conductivity and stability of Al-doped ZnO nanostructured ceramics
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
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چکیده انگلیسی
Pure and Al-doped ZnO powders have been sintered by Spark Plasma Sintering. Al doping allows the ceramics to reach a relative density greater than 90% at a sintering temperature of 500â°C. The morphology of powder nanoparticles impacts the final grain size of the sintered bulk compounds. A ceramic sintered from isotropic nanoparticles of 30ânm in diameter can reach an average grain size of 110ânm, whereas a ceramic sintered from platelets and isotropic nanoparticles exhibits an average grain size in the submicrometric range. The influence of ceramic grain size on the thermal conductivity has been investigated. It shows that substantial decrease of the grain size from several microns down to 100ânm reduces the thermal conductivity from 29.5 to 7.8âW/mâK at 100â°C. The stability of nanostructured ceramic has also been checked. After SPS, an annealing at 500â°C in air also leads to grain growth.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Journal of the European Ceramic Society - Volume 38, Issue 15, December 2018, Pages 5015-5020
Journal: Journal of the European Ceramic Society - Volume 38, Issue 15, December 2018, Pages 5015-5020
نویسندگان
Fabien Giovannelli, Cong Chen, Pablo DÃaz-Chao, Emmanuel Guilmeau, Fabian Delorme,