کد مقاله | کد نشریه | سال انتشار | مقاله انگلیسی | نسخه تمام متن |
---|---|---|---|---|
8948437 | 1645668 | 2018 | 35 صفحه PDF | دانلود رایگان |
عنوان انگلیسی مقاله ISI
Preparation of Si3N4 porous ceramics via foam-gelcasting and microwave-nitridation method
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کلمات کلیدی
موضوعات مرتبط
مهندسی و علوم پایه
مهندسی مواد
سرامیک و کامپوزیت
پیش نمایش صفحه اول مقاله
چکیده انگلیسی
Si3N4 porous ceramics with improved mechanical strength were fabricated for the first time by a combined foam-gelcasting and microwave-nitridation method at 1273-1373â¯K. The Si3N4 porous samples prepared at 1373â¯K/20â¯min with the porosity of 68.9% had respectively flexural and compressive strength as high as 8.1 and 20.8â¯MPa, which values were comparable or even superior to those of Si3N4 porous ceramics prepared previously by the conventional heating technique at a much higher temperature of 1773-1973â¯K, indicating that present preparation strategy is feasible to prepare high quality Si3N4 porous ceramic at a much milder condition. Moreover, the thermal conductivity of as-prepared Si3N4 porous ceramics at 1073â¯K was as low as 1.697â¯W/(mâ¯K), suggesting it could be a potentially good heat insulating material for aluminum electrolyte cells.
ناشر
Database: Elsevier - ScienceDirect (ساینس دایرکت)
Journal: Ceramics International - Volume 44, Issue 15, 15 October 2018, Pages 17675-17680
Journal: Ceramics International - Volume 44, Issue 15, 15 October 2018, Pages 17675-17680
نویسندگان
Lei Han, Faliang Li, Liang Huang, Haijun Zhang, Yuantao Pei, Longhao Dong, Jialian Zhang, Shaowei Zhang,